diff options
Diffstat (limited to 'storage/xtradb/handler/i_s.cc')
| -rw-r--r-- | storage/xtradb/handler/i_s.cc | 1836 |
1 files changed, 1834 insertions, 2 deletions
diff --git a/storage/xtradb/handler/i_s.cc b/storage/xtradb/handler/i_s.cc index 57a091ea80d..29a80594344 100644 --- a/storage/xtradb/handler/i_s.cc +++ b/storage/xtradb/handler/i_s.cc @@ -64,8 +64,93 @@ extern "C" { #include "buf0lru.h" /* for XTRA_LRU_[DUMP/RESTORE] */ #include "btr0btr.h" /* for btr_page_get_index_id */ #include "log0online.h" +#include "btr0btr.h" +#include "page0zip.h" +#include "log0log.h" } +/** structure associates a name string with a file page type and/or buffer +page state. */ +struct buffer_page_desc_str_struct{ + const char* type_str; /*!< String explain the page + type/state */ + ulint type_value; /*!< Page type or page state */ +}; + +typedef struct buffer_page_desc_str_struct buf_page_desc_str_t; + +/** Any states greater than FIL_PAGE_TYPE_LAST would be treated as unknown. */ +#define I_S_PAGE_TYPE_UNKNOWN (FIL_PAGE_TYPE_LAST + 1) + +/** We also define I_S_PAGE_TYPE_INDEX as the Index Page's position +in i_s_page_type[] array */ +#define I_S_PAGE_TYPE_INDEX 1 + +/** Name string for File Page Types */ +static buf_page_desc_str_t i_s_page_type[] = { + {"ALLOCATED", FIL_PAGE_TYPE_ALLOCATED}, + {"INDEX", FIL_PAGE_INDEX}, + {"UNDO_LOG", FIL_PAGE_UNDO_LOG}, + {"INODE", FIL_PAGE_INODE}, + {"IBUF_FREE_LIST", FIL_PAGE_IBUF_FREE_LIST}, + {"IBUF_BITMAP", FIL_PAGE_IBUF_BITMAP}, + {"SYSTEM", FIL_PAGE_TYPE_SYS}, + {"TRX_SYSTEM", FIL_PAGE_TYPE_TRX_SYS}, + {"FILE_SPACE_HEADER", FIL_PAGE_TYPE_FSP_HDR}, + {"EXTENT_DESCRIPTOR", FIL_PAGE_TYPE_XDES}, + {"BLOB", FIL_PAGE_TYPE_BLOB}, + {"COMPRESSED_BLOB", FIL_PAGE_TYPE_ZBLOB}, + {"COMPRESSED_BLOB2", FIL_PAGE_TYPE_ZBLOB2}, + {"UNKNOWN", I_S_PAGE_TYPE_UNKNOWN} +}; + +/* Check if we can hold all page type in a 4 bit value */ +#if I_S_PAGE_TYPE_UNKNOWN > 1<<4 +# error "i_s_page_type[] is too large" +#endif + +/** This structure defines information we will fetch from pages +currently cached in the buffer pool. It will be used to populate +table INFORMATION_SCHEMA.INNODB_BUFFER_PAGE */ +struct buffer_page_info_struct{ + ulint block_id; /*!< Buffer Pool block ID */ + unsigned space_id:32; /*!< Tablespace ID */ + unsigned page_num:32; /*!< Page number/offset */ + unsigned access_time:32; /*!< Time of first access */ + unsigned pool_id:MAX_BUFFER_POOLS_BITS; + /*!< Buffer Pool ID. Must be less than + MAX_BUFFER_POOLS */ + unsigned flush_type:2; /*!< Flush type */ + unsigned io_fix:2; /*!< type of pending I/O operation */ + unsigned fix_count:19; /*!< Count of how manyfold this block + is bufferfixed */ + unsigned hashed:1; /*!< Whether hash index has been + built on this page */ + unsigned is_old:1; /*!< TRUE if the block is in the old + blocks in buf_pool->LRU_old */ + unsigned freed_page_clock:31; /*!< the value of + buf_pool->freed_page_clock */ + unsigned zip_ssize:PAGE_ZIP_SSIZE_BITS; + /*!< Compressed page size */ + unsigned page_state:BUF_PAGE_STATE_BITS; /*!< Page state */ + unsigned page_type:4; /*!< Page type */ + unsigned num_recs; + /*!< Number of records on Page */ + unsigned data_size; + /*!< Sum of the sizes of the records */ + lsn_t newest_mod; /*!< Log sequence number of + the youngest modification */ + lsn_t oldest_mod; /*!< Log sequence number of + the oldest modification */ + index_id_t index_id; /*!< Index ID if a index page */ +}; + +typedef struct buffer_page_info_struct buf_page_info_t; + +/** maximum number of buffer page info we would cache. */ +#define MAX_BUF_INFO_CACHED 10000 + + #define OK(expr) \ if ((expr) != 0) { \ DBUG_RETURN(1); \ @@ -1570,7 +1655,6 @@ i_s_cmpmem_fill_low( buf_pool = buf_pool_from_array(i); - //buf_pool_mutex_enter(buf_pool); mutex_enter(&buf_pool->zip_free_mutex); for (uint x = 0; x <= BUF_BUDDY_SIZES; x++) { @@ -1601,7 +1685,6 @@ i_s_cmpmem_fill_low( } } - //buf_pool_mutex_exit(buf_pool); mutex_exit(&buf_pool->zip_free_mutex); if (status) { @@ -1771,6 +1854,1755 @@ UNIV_INTERN struct st_maria_plugin i_s_innodb_cmpmem_reset = INNODB_VERSION_STR, MariaDB_PLUGIN_MATURITY_STABLE }; +/* Fields of the dynamic table INNODB_BUFFER_POOL_STATS. */ +static ST_FIELD_INFO i_s_innodb_buffer_stats_fields_info[] = +{ +#define IDX_BUF_STATS_POOL_ID 0 + {STRUCT_FLD(field_name, "POOL_ID"), + STRUCT_FLD(field_length, MY_INT64_NUM_DECIMAL_DIGITS), + STRUCT_FLD(field_type, MYSQL_TYPE_LONGLONG), + STRUCT_FLD(value, 0), + STRUCT_FLD(field_flags, MY_I_S_UNSIGNED), + STRUCT_FLD(old_name, ""), + STRUCT_FLD(open_method, SKIP_OPEN_TABLE)}, + +#define IDX_BUF_STATS_POOL_SIZE 1 + {STRUCT_FLD(field_name, "POOL_SIZE"), + STRUCT_FLD(field_length, MY_INT64_NUM_DECIMAL_DIGITS), + STRUCT_FLD(field_type, MYSQL_TYPE_LONGLONG), + STRUCT_FLD(value, 0), + STRUCT_FLD(field_flags, MY_I_S_UNSIGNED), + STRUCT_FLD(old_name, ""), + STRUCT_FLD(open_method, SKIP_OPEN_TABLE)}, + +#define IDX_BUF_STATS_FREE_BUFFERS 2 + {STRUCT_FLD(field_name, "FREE_BUFFERS"), + STRUCT_FLD(field_length, MY_INT64_NUM_DECIMAL_DIGITS), + STRUCT_FLD(field_type, MYSQL_TYPE_LONGLONG), + STRUCT_FLD(value, 0), + STRUCT_FLD(field_flags, MY_I_S_UNSIGNED), + STRUCT_FLD(old_name, ""), + STRUCT_FLD(open_method, SKIP_OPEN_TABLE)}, + +#define IDX_BUF_STATS_LRU_LEN 3 + {STRUCT_FLD(field_name, "DATABASE_PAGES"), + STRUCT_FLD(field_length, MY_INT64_NUM_DECIMAL_DIGITS), + STRUCT_FLD(field_type, MYSQL_TYPE_LONGLONG), + STRUCT_FLD(value, 0), + STRUCT_FLD(field_flags, MY_I_S_UNSIGNED), + STRUCT_FLD(old_name, ""), + STRUCT_FLD(open_method, SKIP_OPEN_TABLE)}, + +#define IDX_BUF_STATS_OLD_LRU_LEN 4 + {STRUCT_FLD(field_name, "OLD_DATABASE_PAGES"), + STRUCT_FLD(field_length, MY_INT64_NUM_DECIMAL_DIGITS), + STRUCT_FLD(field_type, MYSQL_TYPE_LONGLONG), + STRUCT_FLD(value, 0), + STRUCT_FLD(field_flags, MY_I_S_UNSIGNED), + STRUCT_FLD(old_name, ""), + STRUCT_FLD(open_method, SKIP_OPEN_TABLE)}, + +#define IDX_BUF_STATS_FLUSH_LIST_LEN 5 + {STRUCT_FLD(field_name, "MODIFIED_DATABASE_PAGES"), + STRUCT_FLD(field_length, MY_INT64_NUM_DECIMAL_DIGITS), + STRUCT_FLD(field_type, MYSQL_TYPE_LONGLONG), + STRUCT_FLD(value, 0), + STRUCT_FLD(field_flags, MY_I_S_UNSIGNED), + STRUCT_FLD(old_name, ""), + STRUCT_FLD(open_method, SKIP_OPEN_TABLE)}, + +#define IDX_BUF_STATS_PENDING_ZIP 6 + {STRUCT_FLD(field_name, "PENDING_DECOMPRESS"), + STRUCT_FLD(field_length, MY_INT64_NUM_DECIMAL_DIGITS), + STRUCT_FLD(field_type, MYSQL_TYPE_LONGLONG), + STRUCT_FLD(value, 0), + STRUCT_FLD(field_flags, MY_I_S_UNSIGNED), + STRUCT_FLD(old_name, ""), + STRUCT_FLD(open_method, SKIP_OPEN_TABLE)}, + +#define IDX_BUF_STATS_PENDING_READ 7 + {STRUCT_FLD(field_name, "PENDING_READS"), + STRUCT_FLD(field_length, MY_INT64_NUM_DECIMAL_DIGITS), + STRUCT_FLD(field_type, MYSQL_TYPE_LONGLONG), + STRUCT_FLD(value, 0), + STRUCT_FLD(field_flags, MY_I_S_UNSIGNED), + STRUCT_FLD(old_name, ""), + STRUCT_FLD(open_method, SKIP_OPEN_TABLE)}, + +#define IDX_BUF_STATS_FLUSH_LRU 8 + {STRUCT_FLD(field_name, "PENDING_FLUSH_LRU"), + STRUCT_FLD(field_length, MY_INT64_NUM_DECIMAL_DIGITS), + STRUCT_FLD(field_type, MYSQL_TYPE_LONGLONG), + STRUCT_FLD(value, 0), + STRUCT_FLD(field_flags, MY_I_S_UNSIGNED), + STRUCT_FLD(old_name, ""), + STRUCT_FLD(open_method, SKIP_OPEN_TABLE)}, + +#define IDX_BUF_STATS_FLUSH_LIST 9 + {STRUCT_FLD(field_name, "PENDING_FLUSH_LIST"), + STRUCT_FLD(field_length, MY_INT64_NUM_DECIMAL_DIGITS), + STRUCT_FLD(field_type, MYSQL_TYPE_LONGLONG), + STRUCT_FLD(value, 0), + STRUCT_FLD(field_flags, MY_I_S_UNSIGNED), + STRUCT_FLD(old_name, ""), + STRUCT_FLD(open_method, SKIP_OPEN_TABLE)}, + +#define IDX_BUF_STATS_PAGE_YOUNG 10 + {STRUCT_FLD(field_name, "PAGES_MADE_YOUNG"), + STRUCT_FLD(field_length, MY_INT64_NUM_DECIMAL_DIGITS), + STRUCT_FLD(field_type, MYSQL_TYPE_LONGLONG), + STRUCT_FLD(value, 0), + STRUCT_FLD(field_flags, MY_I_S_UNSIGNED), + STRUCT_FLD(old_name, ""), + STRUCT_FLD(open_method, SKIP_OPEN_TABLE)}, + +#define IDX_BUF_STATS_PAGE_NOT_YOUNG 11 + {STRUCT_FLD(field_name, "PAGES_NOT_MADE_YOUNG"), + STRUCT_FLD(field_length, MY_INT64_NUM_DECIMAL_DIGITS), + STRUCT_FLD(field_type, MYSQL_TYPE_LONGLONG), + STRUCT_FLD(value, 0), + STRUCT_FLD(field_flags, MY_I_S_UNSIGNED), + STRUCT_FLD(old_name, ""), + STRUCT_FLD(open_method, SKIP_OPEN_TABLE)}, + +#define IDX_BUF_STATS_PAGE_YOUNG_RATE 12 + {STRUCT_FLD(field_name, "PAGES_MADE_YOUNG_RATE"), + STRUCT_FLD(field_length, MAX_FLOAT_STR_LENGTH), + STRUCT_FLD(field_type, MYSQL_TYPE_FLOAT), + STRUCT_FLD(value, 0), + STRUCT_FLD(field_flags, 0), + STRUCT_FLD(old_name, ""), + STRUCT_FLD(open_method, SKIP_OPEN_TABLE)}, + +#define IDX_BUF_STATS_PAGE_NOT_YOUNG_RATE 13 + {STRUCT_FLD(field_name, "PAGES_MADE_NOT_YOUNG_RATE"), + STRUCT_FLD(field_length, MAX_FLOAT_STR_LENGTH), + STRUCT_FLD(field_type, MYSQL_TYPE_FLOAT), + STRUCT_FLD(value, 0), + STRUCT_FLD(field_flags, 0), + STRUCT_FLD(old_name, ""), + STRUCT_FLD(open_method, SKIP_OPEN_TABLE)}, + +#define IDX_BUF_STATS_PAGE_READ 14 + {STRUCT_FLD(field_name, "NUMBER_PAGES_READ"), + STRUCT_FLD(field_length, MY_INT64_NUM_DECIMAL_DIGITS), + STRUCT_FLD(field_type, MYSQL_TYPE_LONGLONG), + STRUCT_FLD(value, 0), + STRUCT_FLD(field_flags, MY_I_S_UNSIGNED), + STRUCT_FLD(old_name, ""), + STRUCT_FLD(open_method, SKIP_OPEN_TABLE)}, + +#define IDX_BUF_STATS_PAGE_CREATED 15 + {STRUCT_FLD(field_name, "NUMBER_PAGES_CREATED"), + STRUCT_FLD(field_length, MY_INT64_NUM_DECIMAL_DIGITS), + STRUCT_FLD(field_type, MYSQL_TYPE_LONGLONG), + STRUCT_FLD(value, 0), + STRUCT_FLD(field_flags, MY_I_S_UNSIGNED), + STRUCT_FLD(old_name, ""), + STRUCT_FLD(open_method, SKIP_OPEN_TABLE)}, + +#define IDX_BUF_STATS_PAGE_WRITTEN 16 + {STRUCT_FLD(field_name, "NUMBER_PAGES_WRITTEN"), + STRUCT_FLD(field_length, MY_INT64_NUM_DECIMAL_DIGITS), + STRUCT_FLD(field_type, MYSQL_TYPE_LONGLONG), + STRUCT_FLD(value, 0), + STRUCT_FLD(field_flags, MY_I_S_UNSIGNED), + STRUCT_FLD(old_name, ""), + STRUCT_FLD(open_method, SKIP_OPEN_TABLE)}, + +#define IDX_BUF_STATS_PAGE_READ_RATE 17 + {STRUCT_FLD(field_name, "PAGES_READ_RATE"), + STRUCT_FLD(field_length, MAX_FLOAT_STR_LENGTH), + STRUCT_FLD(field_type, MYSQL_TYPE_FLOAT), + STRUCT_FLD(value, 0), + STRUCT_FLD(field_flags, 0), + STRUCT_FLD(old_name, ""), + STRUCT_FLD(open_method, SKIP_OPEN_TABLE)}, + +#define IDX_BUF_STATS_PAGE_CREATE_RATE 18 + {STRUCT_FLD(field_name, "PAGES_CREATE_RATE"), + STRUCT_FLD(field_length, MAX_FLOAT_STR_LENGTH), + STRUCT_FLD(field_type, MYSQL_TYPE_FLOAT), + STRUCT_FLD(value, 0), + STRUCT_FLD(field_flags, 0), + STRUCT_FLD(old_name, ""), + STRUCT_FLD(open_method, SKIP_OPEN_TABLE)}, + +#define IDX_BUF_STATS_PAGE_WRITTEN_RATE 19 + {STRUCT_FLD(field_name, "PAGES_WRITTEN_RATE"), + STRUCT_FLD(field_length, MAX_FLOAT_STR_LENGTH), + STRUCT_FLD(field_type, MYSQL_TYPE_FLOAT), + STRUCT_FLD(value, 0), + STRUCT_FLD(field_flags, 0), + STRUCT_FLD(old_name, ""), + STRUCT_FLD(open_method, SKIP_OPEN_TABLE)}, + +#define IDX_BUF_STATS_GET 20 + {STRUCT_FLD(field_name, "NUMBER_PAGES_GET"), + STRUCT_FLD(field_length, MY_INT64_NUM_DECIMAL_DIGITS), + STRUCT_FLD(field_type, MYSQL_TYPE_LONGLONG), + STRUCT_FLD(value, 0), + STRUCT_FLD(field_flags, MY_I_S_UNSIGNED), + STRUCT_FLD(old_name, ""), + STRUCT_FLD(open_method, SKIP_OPEN_TABLE)}, + +#define IDX_BUF_STATS_HIT_RATE 21 + {STRUCT_FLD(field_name, "HIT_RATE"), + STRUCT_FLD(field_length, MY_INT64_NUM_DECIMAL_DIGITS), + STRUCT_FLD(field_type, MYSQL_TYPE_LONGLONG), + STRUCT_FLD(value, 0), + STRUCT_FLD(field_flags, MY_I_S_UNSIGNED), + STRUCT_FLD(old_name, ""), + STRUCT_FLD(open_method, SKIP_OPEN_TABLE)}, + +#define IDX_BUF_STATS_MADE_YOUNG_PCT 22 + {STRUCT_FLD(field_name, "YOUNG_MAKE_PER_THOUSAND_GETS"), + STRUCT_FLD(field_length, MY_INT64_NUM_DECIMAL_DIGITS), + STRUCT_FLD(field_type, MYSQL_TYPE_LONGLONG), + STRUCT_FLD(value, 0), + STRUCT_FLD(field_flags, MY_I_S_UNSIGNED), + STRUCT_FLD(old_name, ""), + STRUCT_FLD(open_method, SKIP_OPEN_TABLE)}, + +#define IDX_BUF_STATS_NOT_MADE_YOUNG_PCT 23 + {STRUCT_FLD(field_name, "NOT_YOUNG_MAKE_PER_THOUSAND_GETS"), + STRUCT_FLD(field_length, MY_INT64_NUM_DECIMAL_DIGITS), + STRUCT_FLD(field_type, MYSQL_TYPE_LONGLONG), + STRUCT_FLD(value, 0), + STRUCT_FLD(field_flags, MY_I_S_UNSIGNED), + STRUCT_FLD(old_name, ""), + STRUCT_FLD(open_method, SKIP_OPEN_TABLE)}, + +#define IDX_BUF_STATS_READ_AHREAD 24 + {STRUCT_FLD(field_name, "NUMBER_PAGES_READ_AHEAD"), + STRUCT_FLD(field_length, MY_INT64_NUM_DECIMAL_DIGITS), + STRUCT_FLD(field_type, MYSQL_TYPE_LONGLONG), + STRUCT_FLD(value, 0), + STRUCT_FLD(field_flags, MY_I_S_UNSIGNED), + STRUCT_FLD(old_name, ""), + STRUCT_FLD(open_method, SKIP_OPEN_TABLE)}, + +#define IDX_BUF_STATS_READ_AHEAD_EVICTED 25 + {STRUCT_FLD(field_name, "NUMBER_READ_AHEAD_EVICTED"), + STRUCT_FLD(field_length, MY_INT64_NUM_DECIMAL_DIGITS), + STRUCT_FLD(field_type, MYSQL_TYPE_LONGLONG), + STRUCT_FLD(value, 0), + STRUCT_FLD(field_flags, MY_I_S_UNSIGNED), + STRUCT_FLD(old_name, ""), + STRUCT_FLD(open_method, SKIP_OPEN_TABLE)}, + +#define IDX_BUF_STATS_READ_AHEAD_RATE 26 + {STRUCT_FLD(field_name, "READ_AHEAD_RATE"), + STRUCT_FLD(field_length, MAX_FLOAT_STR_LENGTH), + STRUCT_FLD(field_type, MYSQL_TYPE_FLOAT), + STRUCT_FLD(value, 0), + STRUCT_FLD(field_flags, 0), + STRUCT_FLD(old_name, ""), + STRUCT_FLD(open_method, SKIP_OPEN_TABLE)}, + +#define IDX_BUF_STATS_READ_AHEAD_EVICT_RATE 27 + {STRUCT_FLD(field_name, "READ_AHEAD_EVICTED_RATE"), + STRUCT_FLD(field_length, MAX_FLOAT_STR_LENGTH), + STRUCT_FLD(field_type, MYSQL_TYPE_FLOAT), + STRUCT_FLD(value, 0), + STRUCT_FLD(field_flags, 0), + STRUCT_FLD(old_name, ""), + STRUCT_FLD(open_method, SKIP_OPEN_TABLE)}, + +#define IDX_BUF_STATS_LRU_IO_SUM 28 + {STRUCT_FLD(field_name, "LRU_IO_TOTAL"), + STRUCT_FLD(field_length, MY_INT64_NUM_DECIMAL_DIGITS), + STRUCT_FLD(field_type, MYSQL_TYPE_LONGLONG), + STRUCT_FLD(value, 0), + STRUCT_FLD(field_flags, MY_I_S_UNSIGNED), + STRUCT_FLD(old_name, ""), + STRUCT_FLD(open_method, SKIP_OPEN_TABLE)}, + +#define IDX_BUF_STATS_LRU_IO_CUR 29 + {STRUCT_FLD(field_name, "LRU_IO_CURRENT"), + STRUCT_FLD(field_length, MY_INT64_NUM_DECIMAL_DIGITS), + STRUCT_FLD(field_type, MYSQL_TYPE_LONGLONG), + STRUCT_FLD(value, 0), + STRUCT_FLD(field_flags, MY_I_S_UNSIGNED), + STRUCT_FLD(old_name, ""), + STRUCT_FLD(open_method, SKIP_OPEN_TABLE)}, + +#define IDX_BUF_STATS_UNZIP_SUM 30 + {STRUCT_FLD(field_name, "UNCOMPRESS_TOTAL"), + STRUCT_FLD(field_length, MY_INT64_NUM_DECIMAL_DIGITS), + STRUCT_FLD(field_type, MYSQL_TYPE_LONGLONG), + STRUCT_FLD(value, 0), + STRUCT_FLD(field_flags, MY_I_S_UNSIGNED), + STRUCT_FLD(old_name, ""), + STRUCT_FLD(open_method, SKIP_OPEN_TABLE)}, + +#define IDX_BUF_STATS_UNZIP_CUR 31 + {STRUCT_FLD(field_name, "UNCOMPRESS_CURRENT"), + STRUCT_FLD(field_length, MY_INT64_NUM_DECIMAL_DIGITS), + STRUCT_FLD(field_type, MYSQL_TYPE_LONGLONG), + STRUCT_FLD(value, 0), + STRUCT_FLD(field_flags, MY_I_S_UNSIGNED), + STRUCT_FLD(old_name, ""), + STRUCT_FLD(open_method, SKIP_OPEN_TABLE)}, + + END_OF_ST_FIELD_INFO +}; + +/*******************************************************************//** +Fill Information Schema table INNODB_BUFFER_POOL_STATS for a particular +buffer pool +@return 0 on success, 1 on failure */ +static +int +i_s_innodb_stats_fill( +/*==================*/ + THD* thd, /*!< in: thread */ + TABLE_LIST* tables, /*!< in/out: tables to fill */ + const buf_pool_info_t* info) /*!< in: buffer pool + information */ +{ + TABLE* table; + Field** fields; + + DBUG_ENTER("i_s_innodb_stats_fill"); + + table = tables->table; + + fields = table->field; + + OK(fields[IDX_BUF_STATS_POOL_ID]->store(info->pool_unique_id)); + + OK(fields[IDX_BUF_STATS_POOL_SIZE]->store(info->pool_size)); + + OK(fields[IDX_BUF_STATS_LRU_LEN]->store(info->lru_len)); + + OK(fields[IDX_BUF_STATS_OLD_LRU_LEN]->store(info->old_lru_len)); + + OK(fields[IDX_BUF_STATS_FREE_BUFFERS]->store(info->free_list_len)); + + OK(fields[IDX_BUF_STATS_FLUSH_LIST_LEN]->store( + info->flush_list_len)); + + OK(fields[IDX_BUF_STATS_PENDING_ZIP]->store(info->n_pend_unzip)); + + OK(fields[IDX_BUF_STATS_PENDING_READ]->store(info->n_pend_reads)); + + OK(fields[IDX_BUF_STATS_FLUSH_LRU]->store(info->n_pending_flush_lru)); + + OK(fields[IDX_BUF_STATS_FLUSH_LIST]->store(info->n_pending_flush_list)); + + OK(fields[IDX_BUF_STATS_PAGE_YOUNG]->store(info->n_pages_made_young)); + + OK(fields[IDX_BUF_STATS_PAGE_NOT_YOUNG]->store( + info->n_pages_not_made_young)); + + OK(fields[IDX_BUF_STATS_PAGE_YOUNG_RATE]->store( + info->page_made_young_rate)); + + OK(fields[IDX_BUF_STATS_PAGE_NOT_YOUNG_RATE]->store( + info->page_not_made_young_rate)); + + OK(fields[IDX_BUF_STATS_PAGE_READ]->store(info->n_pages_read)); + + OK(fields[IDX_BUF_STATS_PAGE_CREATED]->store(info->n_pages_created)); + + OK(fields[IDX_BUF_STATS_PAGE_WRITTEN]->store(info->n_pages_written)); + + OK(fields[IDX_BUF_STATS_GET]->store(info->n_page_gets)); + + OK(fields[IDX_BUF_STATS_PAGE_READ_RATE]->store(info->pages_read_rate)); + + OK(fields[IDX_BUF_STATS_PAGE_CREATE_RATE]->store(info->pages_created_rate)); + + OK(fields[IDX_BUF_STATS_PAGE_WRITTEN_RATE]->store(info->pages_written_rate)); + + if (info->n_page_get_delta) { + OK(fields[IDX_BUF_STATS_HIT_RATE]->store( + 1000 - (1000 * info->page_read_delta + / info->n_page_get_delta))); + + OK(fields[IDX_BUF_STATS_MADE_YOUNG_PCT]->store( + 1000 * info->young_making_delta + / info->n_page_get_delta)); + + OK(fields[IDX_BUF_STATS_NOT_MADE_YOUNG_PCT]->store( + 1000 * info->not_young_making_delta + / info->n_page_get_delta)); + } else { + OK(fields[IDX_BUF_STATS_HIT_RATE]->store(0)); + OK(fields[IDX_BUF_STATS_MADE_YOUNG_PCT]->store(0)); + OK(fields[IDX_BUF_STATS_NOT_MADE_YOUNG_PCT]->store(0)); + } + + OK(fields[IDX_BUF_STATS_READ_AHREAD]->store(info->n_ra_pages_read)); + + OK(fields[IDX_BUF_STATS_READ_AHEAD_EVICTED]->store( + info->n_ra_pages_evicted)); + + OK(fields[IDX_BUF_STATS_READ_AHEAD_RATE]->store( + info->pages_readahead_rate)); + + OK(fields[IDX_BUF_STATS_READ_AHEAD_EVICT_RATE]->store( + info->pages_evicted_rate)); + + OK(fields[IDX_BUF_STATS_LRU_IO_SUM]->store(info->io_sum)); + + OK(fields[IDX_BUF_STATS_LRU_IO_CUR]->store(info->io_cur)); + + OK(fields[IDX_BUF_STATS_UNZIP_SUM]->store(info->unzip_sum)); + + OK(fields[IDX_BUF_STATS_UNZIP_CUR]->store( info->unzip_cur)); + + DBUG_RETURN(schema_table_store_record(thd, table)); +} + +/*******************************************************************//** +This is the function that loops through each buffer pool and fetch buffer +pool stats to information schema table: I_S_INNODB_BUFFER_POOL_STATS +@return 0 on success, 1 on failure */ +static +int +i_s_innodb_buffer_stats_fill_table( +/*===============================*/ + THD* thd, /*!< in: thread */ + TABLE_LIST* tables, /*!< in/out: tables to fill */ + Item* ) /*!< in: condition (ignored) */ +{ + int status = 0; + buf_pool_info_t* pool_info; + + DBUG_ENTER("i_s_innodb_buffer_fill_general"); + + /* Only allow the PROCESS privilege holder to access the stats */ + if (check_global_access(thd, PROCESS_ACL)) { + DBUG_RETURN(0); + } + + pool_info = (buf_pool_info_t*) mem_zalloc( + srv_buf_pool_instances * sizeof *pool_info); + + /* Walk through each buffer pool */ + for (ulint i = 0; i < srv_buf_pool_instances; i++) { + buf_pool_t* buf_pool; + + buf_pool = buf_pool_from_array(i); + + /* Fetch individual buffer pool info */ + buf_stats_get_pool_info(buf_pool, i, pool_info); + + status = i_s_innodb_stats_fill(thd, tables, &pool_info[i]); + + /* If something goes wrong, break and return */ + if (status) { + break; + } + } + + mem_free(pool_info); + + DBUG_RETURN(status); +} + +/*******************************************************************//** +Bind the dynamic table INFORMATION_SCHEMA.INNODB_BUFFER_POOL_STATS. +@return 0 on success, 1 on failure */ +static +int +i_s_innodb_buffer_pool_stats_init( +/*==============================*/ + void* p) /*!< in/out: table schema object */ +{ + ST_SCHEMA_TABLE* schema; + + DBUG_ENTER("i_s_innodb_buffer_pool_stats_init"); + + schema = reinterpret_cast<ST_SCHEMA_TABLE*>(p); + + schema->fields_info = i_s_innodb_buffer_stats_fields_info; + schema->fill_table = i_s_innodb_buffer_stats_fill_table; + + DBUG_RETURN(0); +} + +UNIV_INTERN struct st_maria_plugin i_s_innodb_buffer_stats = +{ + /* the plugin type (a MYSQL_XXX_PLUGIN value) */ + /* int */ + STRUCT_FLD(type, MYSQL_INFORMATION_SCHEMA_PLUGIN), + + /* pointer to type-specific plugin descriptor */ + /* void* */ + STRUCT_FLD(info, &i_s_info), + + /* plugin name */ + /* const char* */ + STRUCT_FLD(name, "INNODB_BUFFER_POOL_STATS"), + + /* plugin author (for SHOW PLUGINS) */ + /* const char* */ + STRUCT_FLD(author, plugin_author), + + /* general descriptive text (for SHOW PLUGINS) */ + /* const char* */ + STRUCT_FLD(descr, "InnoDB Buffer Pool Statistics Information "), + + /* the plugin license (PLUGIN_LICENSE_XXX) */ + /* int */ + STRUCT_FLD(license, PLUGIN_LICENSE_GPL), + + /* the function to invoke when plugin is loaded */ + /* int (*)(void*); */ + STRUCT_FLD(init, i_s_innodb_buffer_pool_stats_init), + + /* the function to invoke when plugin is unloaded */ + /* int (*)(void*); */ + STRUCT_FLD(deinit, i_s_common_deinit), + + /* plugin version (for SHOW PLUGINS) */ + /* unsigned int */ + STRUCT_FLD(version, INNODB_VERSION_SHORT), + + /* struct st_mysql_show_var* */ + STRUCT_FLD(status_vars, NULL), + + /* struct st_mysql_sys_var** */ + STRUCT_FLD(system_vars, NULL), + + INNODB_VERSION_STR, MariaDB_PLUGIN_MATURITY_STABLE +}; + +/* Fields of the dynamic table INNODB_BUFFER_POOL_PAGE. */ +static ST_FIELD_INFO i_s_innodb_buffer_page_fields_info[] = +{ +#define IDX_BUFFER_POOL_ID 0 + {STRUCT_FLD(field_name, "POOL_ID"), + STRUCT_FLD(field_length, MY_INT64_NUM_DECIMAL_DIGITS), + STRUCT_FLD(field_type, MYSQL_TYPE_LONGLONG), + STRUCT_FLD(value, 0), + STRUCT_FLD(field_flags, MY_I_S_UNSIGNED), + STRUCT_FLD(old_name, ""), + STRUCT_FLD(open_method, SKIP_OPEN_TABLE)}, + +#define IDX_BUFFER_BLOCK_ID 1 + {STRUCT_FLD(field_name, "BLOCK_ID"), + STRUCT_FLD(field_length, MY_INT64_NUM_DECIMAL_DIGITS), + STRUCT_FLD(field_type, MYSQL_TYPE_LONGLONG), + STRUCT_FLD(value, 0), + STRUCT_FLD(field_flags, MY_I_S_UNSIGNED), + STRUCT_FLD(old_name, ""), + STRUCT_FLD(open_method, SKIP_OPEN_TABLE)}, + +#define IDX_BUFFER_PAGE_SPACE 2 + {STRUCT_FLD(field_name, "SPACE"), + STRUCT_FLD(field_length, MY_INT64_NUM_DECIMAL_DIGITS), + STRUCT_FLD(field_type, MYSQL_TYPE_LONGLONG), + STRUCT_FLD(value, 0), + STRUCT_FLD(field_flags, MY_I_S_UNSIGNED), + STRUCT_FLD(old_name, ""), + STRUCT_FLD(open_method, SKIP_OPEN_TABLE)}, + +#define IDX_BUFFER_PAGE_NUM 3 + {STRUCT_FLD(field_name, "PAGE_NUMBER"), + STRUCT_FLD(field_length, MY_INT64_NUM_DECIMAL_DIGITS), + STRUCT_FLD(field_type, MYSQL_TYPE_LONGLONG), + STRUCT_FLD(value, 0), + STRUCT_FLD(field_flags, MY_I_S_UNSIGNED), + STRUCT_FLD(old_name, ""), + STRUCT_FLD(open_method, SKIP_OPEN_TABLE)}, + +#define IDX_BUFFER_PAGE_TYPE 4 + {STRUCT_FLD(field_name, "PAGE_TYPE"), + STRUCT_FLD(field_length, 64), + STRUCT_FLD(field_type, MYSQL_TYPE_STRING), + STRUCT_FLD(value, 0), + STRUCT_FLD(field_flags, MY_I_S_MAYBE_NULL), + STRUCT_FLD(old_name, ""), + STRUCT_FLD(open_method, SKIP_OPEN_TABLE)}, + +#define IDX_BUFFER_PAGE_FLUSH_TYPE 5 + {STRUCT_FLD(field_name, "FLUSH_TYPE"), + STRUCT_FLD(field_length, MY_INT64_NUM_DECIMAL_DIGITS), + STRUCT_FLD(field_type, MYSQL_TYPE_LONGLONG), + STRUCT_FLD(value, 0), + STRUCT_FLD(field_flags, MY_I_S_UNSIGNED), + STRUCT_FLD(old_name, ""), + STRUCT_FLD(open_method, SKIP_OPEN_TABLE)}, + +#define IDX_BUFFER_PAGE_FIX_COUNT 6 + {STRUCT_FLD(field_name, "FIX_COUNT"), + STRUCT_FLD(field_length, MY_INT64_NUM_DECIMAL_DIGITS), + STRUCT_FLD(field_type, MYSQL_TYPE_LONGLONG), + STRUCT_FLD(value, 0), + STRUCT_FLD(field_flags, MY_I_S_UNSIGNED), + STRUCT_FLD(old_name, ""), + STRUCT_FLD(open_method, SKIP_OPEN_TABLE)}, + +#define IDX_BUFFER_PAGE_HASHED 7 + {STRUCT_FLD(field_name, "IS_HASHED"), + STRUCT_FLD(field_length, 3), + STRUCT_FLD(field_type, MYSQL_TYPE_STRING), + STRUCT_FLD(value, 0), + STRUCT_FLD(field_flags, MY_I_S_MAYBE_NULL), + STRUCT_FLD(old_name, ""), + STRUCT_FLD(open_method, SKIP_OPEN_TABLE)}, + +#define IDX_BUFFER_PAGE_NEWEST_MOD 8 + {STRUCT_FLD(field_name, "NEWEST_MODIFICATION"), + STRUCT_FLD(field_length, MY_INT64_NUM_DECIMAL_DIGITS), + STRUCT_FLD(field_type, MYSQL_TYPE_LONGLONG), + STRUCT_FLD(value, 0), + STRUCT_FLD(field_flags, MY_I_S_UNSIGNED), + STRUCT_FLD(old_name, ""), + STRUCT_FLD(open_method, SKIP_OPEN_TABLE)}, + +#define IDX_BUFFER_PAGE_OLDEST_MOD 9 + {STRUCT_FLD(field_name, "OLDEST_MODIFICATION"), + STRUCT_FLD(field_length, MY_INT64_NUM_DECIMAL_DIGITS), + STRUCT_FLD(field_type, MYSQL_TYPE_LONGLONG), + STRUCT_FLD(value, 0), + STRUCT_FLD(field_flags, MY_I_S_UNSIGNED), + STRUCT_FLD(old_name, ""), + STRUCT_FLD(open_method, SKIP_OPEN_TABLE)}, + +#define IDX_BUFFER_PAGE_ACCESS_TIME 10 + {STRUCT_FLD(field_name, "ACCESS_TIME"), + STRUCT_FLD(field_length, MY_INT64_NUM_DECIMAL_DIGITS), + STRUCT_FLD(field_type, MYSQL_TYPE_LONGLONG), + STRUCT_FLD(value, 0), + STRUCT_FLD(field_flags, MY_I_S_UNSIGNED), + STRUCT_FLD(old_name, ""), + STRUCT_FLD(open_method, SKIP_OPEN_TABLE)}, + +#define IDX_BUFFER_PAGE_TABLE_NAME 11 + {STRUCT_FLD(field_name, "TABLE_NAME"), + STRUCT_FLD(field_length, 1024), + STRUCT_FLD(field_type, MYSQL_TYPE_STRING), + STRUCT_FLD(value, 0), + STRUCT_FLD(field_flags, MY_I_S_MAYBE_NULL), + STRUCT_FLD(old_name, ""), + STRUCT_FLD(open_method, SKIP_OPEN_TABLE)}, + +#define IDX_BUFFER_PAGE_INDEX_NAME 12 + {STRUCT_FLD(field_name, "INDEX_NAME"), + STRUCT_FLD(field_length, 1024), + STRUCT_FLD(field_type, MYSQL_TYPE_STRING), + STRUCT_FLD(value, 0), + STRUCT_FLD(field_flags, MY_I_S_MAYBE_NULL), + STRUCT_FLD(old_name, ""), + STRUCT_FLD(open_method, SKIP_OPEN_TABLE)}, + +#define IDX_BUFFER_PAGE_NUM_RECS 13 + {STRUCT_FLD(field_name, "NUMBER_RECORDS"), + STRUCT_FLD(field_length, MY_INT64_NUM_DECIMAL_DIGITS), + STRUCT_FLD(field_type, MYSQL_TYPE_LONGLONG), + STRUCT_FLD(value, 0), + STRUCT_FLD(field_flags, MY_I_S_UNSIGNED), + STRUCT_FLD(old_name, ""), + STRUCT_FLD(open_method, SKIP_OPEN_TABLE)}, + +#define IDX_BUFFER_PAGE_DATA_SIZE 14 + {STRUCT_FLD(field_name, "DATA_SIZE"), + STRUCT_FLD(field_length, MY_INT64_NUM_DECIMAL_DIGITS), + STRUCT_FLD(field_type, MYSQL_TYPE_LONGLONG), + STRUCT_FLD(value, 0), + STRUCT_FLD(field_flags, MY_I_S_UNSIGNED), + STRUCT_FLD(old_name, ""), + STRUCT_FLD(open_method, SKIP_OPEN_TABLE)}, + +#define IDX_BUFFER_PAGE_ZIP_SIZE 15 + {STRUCT_FLD(field_name, "COMPRESSED_SIZE"), + STRUCT_FLD(field_length, MY_INT64_NUM_DECIMAL_DIGITS), + STRUCT_FLD(field_type, MYSQL_TYPE_LONGLONG), + STRUCT_FLD(value, 0), + STRUCT_FLD(field_flags, MY_I_S_UNSIGNED), + STRUCT_FLD(old_name, ""), + STRUCT_FLD(open_method, SKIP_OPEN_TABLE)}, + +#define IDX_BUFFER_PAGE_STATE 16 + {STRUCT_FLD(field_name, "PAGE_STATE"), + STRUCT_FLD(field_length, 64), + STRUCT_FLD(field_type, MYSQL_TYPE_STRING), + STRUCT_FLD(value, 0), + STRUCT_FLD(field_flags, MY_I_S_MAYBE_NULL), + STRUCT_FLD(old_name, ""), + STRUCT_FLD(open_method, SKIP_OPEN_TABLE)}, + +#define IDX_BUFFER_PAGE_IO_FIX 17 + {STRUCT_FLD(field_name, "IO_FIX"), + STRUCT_FLD(field_length, 64), + STRUCT_FLD(field_type, MYSQL_TYPE_STRING), + STRUCT_FLD(value, 0), + STRUCT_FLD(field_flags, MY_I_S_MAYBE_NULL), + STRUCT_FLD(old_name, ""), + STRUCT_FLD(open_method, SKIP_OPEN_TABLE)}, + +#define IDX_BUFFER_PAGE_IS_OLD 18 + {STRUCT_FLD(field_name, "IS_OLD"), + STRUCT_FLD(field_length, 3), + STRUCT_FLD(field_type, MYSQL_TYPE_STRING), + STRUCT_FLD(value, 0), + STRUCT_FLD(field_flags, MY_I_S_MAYBE_NULL), + STRUCT_FLD(old_name, ""), + STRUCT_FLD(open_method, SKIP_OPEN_TABLE)}, + +#define IDX_BUFFER_PAGE_FREE_CLOCK 19 + {STRUCT_FLD(field_name, "FREE_PAGE_CLOCK"), + STRUCT_FLD(field_length, MY_INT64_NUM_DECIMAL_DIGITS), + STRUCT_FLD(field_type, MYSQL_TYPE_LONGLONG), + STRUCT_FLD(value, 0), + STRUCT_FLD(field_flags, MY_I_S_UNSIGNED), + STRUCT_FLD(old_name, ""), + STRUCT_FLD(open_method, SKIP_OPEN_TABLE)}, + + END_OF_ST_FIELD_INFO +}; + +/*******************************************************************//** +Fill Information Schema table INNODB_BUFFER_PAGE with information +cached in the buf_page_info_t array +@return 0 on success, 1 on failure */ +static +int +i_s_innodb_buffer_page_fill( +/*========================*/ + THD* thd, /*!< in: thread */ + TABLE_LIST* tables, /*!< in/out: tables to fill */ + const buf_page_info_t* info_array, /*!< in: array cached page + info */ + ulint num_page, /*!< in: number of page info + cached */ + mem_heap_t* heap) /*!< in: temp heap memory */ +{ + TABLE* table; + Field** fields; + + DBUG_ENTER("i_s_innodb_buffer_page_fill"); + + table = tables->table; + + fields = table->field; + + /* Iterate through the cached array and fill the I_S table rows */ + for (ulint i = 0; i < num_page; i++) { + const buf_page_info_t* page_info; + const char* table_name; + const char* index_name; + const char* state_str; + enum buf_page_state state; + + page_info = info_array + i; + + table_name = NULL; + index_name = NULL; + state_str = NULL; + + OK(fields[IDX_BUFFER_POOL_ID]->store(page_info->pool_id)); + + OK(fields[IDX_BUFFER_BLOCK_ID]->store(page_info->block_id)); + + OK(fields[IDX_BUFFER_PAGE_SPACE]->store(page_info->space_id)); + + OK(fields[IDX_BUFFER_PAGE_NUM]->store(page_info->page_num)); + + OK(field_store_string( + fields[IDX_BUFFER_PAGE_TYPE], + i_s_page_type[page_info->page_type].type_str)); + + OK(fields[IDX_BUFFER_PAGE_FLUSH_TYPE]->store( + page_info->flush_type)); + + OK(fields[IDX_BUFFER_PAGE_FIX_COUNT]->store( + page_info->fix_count)); + + if (page_info->hashed) { + OK(field_store_string( + fields[IDX_BUFFER_PAGE_HASHED], "YES")); + } else { + OK(field_store_string( + fields[IDX_BUFFER_PAGE_HASHED], "NO")); + } + + OK(fields[IDX_BUFFER_PAGE_NEWEST_MOD]->store( + (longlong) page_info->newest_mod, true)); + + OK(fields[IDX_BUFFER_PAGE_OLDEST_MOD]->store( + (longlong) page_info->oldest_mod, true)); + + OK(fields[IDX_BUFFER_PAGE_ACCESS_TIME]->store( + page_info->access_time)); + + /* If this is an index page, fetch the index name + and table name */ + if (page_info->page_type == I_S_PAGE_TYPE_INDEX) { + const dict_index_t* index; + + mutex_enter(&dict_sys->mutex); + index = dict_index_get_if_in_cache_low( + page_info->index_id); + + /* Copy the index/table name under mutex. We + do not want to hold the InnoDB mutex while + filling the IS table */ + if (index) { + const char* name_ptr = index->name; + + if (name_ptr[0] == TEMP_INDEX_PREFIX) { + name_ptr++; + } + + index_name = mem_heap_strdup(heap, name_ptr); + + table_name = mem_heap_strdup(heap, + index->table_name); + + } + + mutex_exit(&dict_sys->mutex); + } + + OK(field_store_string( + fields[IDX_BUFFER_PAGE_TABLE_NAME], table_name)); + + OK(field_store_string( + fields[IDX_BUFFER_PAGE_INDEX_NAME], index_name)); + + OK(fields[IDX_BUFFER_PAGE_NUM_RECS]->store( + page_info->num_recs)); + + OK(fields[IDX_BUFFER_PAGE_DATA_SIZE]->store( + page_info->data_size)); + + OK(fields[IDX_BUFFER_PAGE_ZIP_SIZE]->store( + page_info->zip_ssize + ? (PAGE_ZIP_MIN_SIZE >> 1) << page_info->zip_ssize + : 0)); + +#if BUF_PAGE_STATE_BITS > 3 +# error "BUF_PAGE_STATE_BITS > 3, please ensure that all 1<<BUF_PAGE_STATE_BITS values are checked for" +#endif + state = static_cast<enum buf_page_state>(page_info->page_state); + + switch (state) { + /* First three states are for compression pages and + are not states we would get as we scan pages through + buffer blocks */ + case BUF_BLOCK_ZIP_FREE: + case BUF_BLOCK_ZIP_PAGE: + case BUF_BLOCK_ZIP_DIRTY: + state_str = NULL; + break; + case BUF_BLOCK_NOT_USED: + state_str = "NOT_USED"; + break; + case BUF_BLOCK_READY_FOR_USE: + state_str = "READY_FOR_USE"; + break; + case BUF_BLOCK_FILE_PAGE: + state_str = "FILE_PAGE"; + break; + case BUF_BLOCK_MEMORY: + state_str = "MEMORY"; + break; + case BUF_BLOCK_REMOVE_HASH: + state_str = "REMOVE_HASH"; + break; + }; + + OK(field_store_string(fields[IDX_BUFFER_PAGE_STATE], + state_str)); + + switch (page_info->io_fix) { + case BUF_IO_NONE: + OK(field_store_string(fields[IDX_BUFFER_PAGE_IO_FIX], + "IO_NONE")); + break; + case BUF_IO_READ: + OK(field_store_string(fields[IDX_BUFFER_PAGE_IO_FIX], + "IO_READ")); + break; + case BUF_IO_WRITE: + OK(field_store_string(fields[IDX_BUFFER_PAGE_IO_FIX], + "IO_WRITE")); + break; + case BUF_IO_PIN: + OK(field_store_string(fields[IDX_BUFFER_PAGE_IO_FIX], + "IO_PIN")); + break; + } + + OK(field_store_string(fields[IDX_BUFFER_PAGE_IS_OLD], + (page_info->is_old) ? "YES" : "NO")); + + OK(fields[IDX_BUFFER_PAGE_FREE_CLOCK]->store( + page_info->freed_page_clock)); + + if (schema_table_store_record(thd, table)) { + DBUG_RETURN(1); + } + } + + DBUG_RETURN(0); +} + +/*******************************************************************//** +Set appropriate page type to a buf_page_info_t structure */ +static +void +i_s_innodb_set_page_type( +/*=====================*/ + buf_page_info_t*page_info, /*!< in/out: structure to fill with + scanned info */ + ulint page_type, /*!< in: page type */ + const byte* frame) /*!< in: buffer frame */ +{ + if (page_type == FIL_PAGE_INDEX) { + const page_t* page = (const page_t*) frame; + + /* FIL_PAGE_INDEX is a bit special, its value + is defined as 17855, so we cannot use FIL_PAGE_INDEX + to index into i_s_page_type[] array, its array index + in the i_s_page_type[] array is I_S_PAGE_TYPE_INDEX + (1) */ + page_info->page_type = I_S_PAGE_TYPE_INDEX; + + page_info->index_id = btr_page_get_index_id(page); + + page_info->data_size = (ulint)(page_header_get_field( + page, PAGE_HEAP_TOP) - (page_is_comp(page) + ? PAGE_NEW_SUPREMUM_END + : PAGE_OLD_SUPREMUM_END) + - page_header_get_field(page, PAGE_GARBAGE)); + + page_info->num_recs = page_get_n_recs(page); + } else if (page_type >= I_S_PAGE_TYPE_UNKNOWN) { + /* Encountered an unknown page type */ + page_info->page_type = I_S_PAGE_TYPE_UNKNOWN; + } else { + /* Make sure we get the right index into the + i_s_page_type[] array */ + ut_a(page_type == i_s_page_type[page_type].type_value); + + page_info->page_type = page_type; + } + + if (page_info->page_type == FIL_PAGE_TYPE_ZBLOB + || page_info->page_type == FIL_PAGE_TYPE_ZBLOB2) { + page_info->page_num = mach_read_from_4( + frame + FIL_PAGE_OFFSET); + page_info->space_id = mach_read_from_4( + frame + FIL_PAGE_ARCH_LOG_NO_OR_SPACE_ID); + } +} +/*******************************************************************//** +Scans pages in the buffer cache, and collect their general information +into the buf_page_info_t array which is zero-filled. So any fields +that are not initialized in the function will default to 0 */ +static +void +i_s_innodb_buffer_page_get_info( +/*============================*/ + const buf_page_t*bpage, /*!< in: buffer pool page to scan */ + ulint pool_id, /*!< in: buffer pool id */ + ulint pos, /*!< in: buffer block position in + buffer pool or in the LRU list */ + buf_page_info_t*page_info) /*!< in: zero filled info structure; + out: structure filled with scanned + info */ +{ + ut_ad(pool_id < MAX_BUFFER_POOLS); + + page_info->pool_id = pool_id; + + page_info->block_id = pos; + + page_info->page_state = buf_page_get_state(bpage); + + /* Only fetch information for buffers that map to a tablespace, + that is, buffer page with state BUF_BLOCK_ZIP_PAGE, + BUF_BLOCK_ZIP_DIRTY or BUF_BLOCK_FILE_PAGE */ + if (buf_page_in_file(bpage)) { + const byte* frame; + ulint page_type; + + page_info->space_id = buf_page_get_space(bpage); + + page_info->page_num = buf_page_get_page_no(bpage); + + page_info->flush_type = bpage->flush_type; + + page_info->fix_count = bpage->buf_fix_count; + + page_info->newest_mod = bpage->newest_modification; + + page_info->oldest_mod = bpage->oldest_modification; + + page_info->access_time = bpage->access_time; + + page_info->zip_ssize = bpage->zip.ssize; + + page_info->io_fix = bpage->io_fix; + + page_info->is_old = bpage->old; + + page_info->freed_page_clock = bpage->freed_page_clock; + + if (page_info->page_state == BUF_BLOCK_FILE_PAGE) { + const buf_block_t*block; + + block = reinterpret_cast<const buf_block_t*>(bpage); + frame = block->frame; + page_info->hashed = (block->index != NULL); + } else { + ut_ad(page_info->zip_ssize); + frame = bpage->zip.data; + } + + page_type = fil_page_get_type(frame); + + i_s_innodb_set_page_type(page_info, page_type, frame); + } else { + page_info->page_type = I_S_PAGE_TYPE_UNKNOWN; + } +} + +/*******************************************************************//** +This is the function that goes through each block of the buffer pool +and fetch information to information schema tables: INNODB_BUFFER_PAGE. +@return 0 on success, 1 on failure */ +static +int +i_s_innodb_fill_buffer_pool( +/*========================*/ + THD* thd, /*!< in: thread */ + TABLE_LIST* tables, /*!< in/out: tables to fill */ + buf_pool_t* buf_pool, /*!< in: buffer pool to scan */ + const ulint pool_id) /*!< in: buffer pool id */ +{ + int status = 0; + mem_heap_t* heap; + + DBUG_ENTER("i_s_innodb_fill_buffer_pool"); + + heap = mem_heap_create(10000); + + /* Go through each chunk of buffer pool. Currently, we only + have one single chunk for each buffer pool */ + for (ulint n = 0; n < buf_pool->n_chunks; n++) { + const buf_block_t* block; + ulint n_blocks; + buf_page_info_t* info_buffer; + ulint num_page; + ulint mem_size; + ulint chunk_size; + ulint num_to_process = 0; + ulint block_id = 0; + mutex_t* block_mutex; + + /* Get buffer block of the nth chunk */ + block = buf_get_nth_chunk_block(buf_pool, n, &chunk_size); + num_page = 0; + + while (chunk_size > 0) { + /* we cache maximum MAX_BUF_INFO_CACHED number of + buffer page info */ + num_to_process = ut_min(chunk_size, + MAX_BUF_INFO_CACHED); + + mem_size = num_to_process * sizeof(buf_page_info_t); + + /* For each chunk, we'll pre-allocate information + structures to cache the page information read from + the buffer pool. Doing so before obtain any mutex */ + info_buffer = (buf_page_info_t*) mem_heap_zalloc( + heap, mem_size); + + /* GO through each block in the chunk */ + for (n_blocks = num_to_process; n_blocks--; block++) { + block_mutex = buf_page_get_mutex_enter(&block->page); + i_s_innodb_buffer_page_get_info( + &block->page, pool_id, block_id, + info_buffer + num_page); + mutex_exit(block_mutex); + block_id++; + num_page++; + } + + + /* Fill in information schema table with information + just collected from the buffer chunk scan */ + status = i_s_innodb_buffer_page_fill( + thd, tables, info_buffer, + num_page, heap); + + /* If something goes wrong, break and return */ + if (status) { + break; + } + + mem_heap_empty(heap); + chunk_size -= num_to_process; + num_page = 0; + } + } + + mem_heap_free(heap); + + DBUG_RETURN(status); +} + +/*******************************************************************//** +Fill page information for pages in InnoDB buffer pool to the +dynamic table INFORMATION_SCHEMA.INNODB_BUFFER_PAGE +@return 0 on success, 1 on failure */ +static +int +i_s_innodb_buffer_page_fill_table( +/*==============================*/ + THD* thd, /*!< in: thread */ + TABLE_LIST* tables, /*!< in/out: tables to fill */ + Item* ) /*!< in: condition (ignored) */ +{ + int status = 0; + + DBUG_ENTER("i_s_innodb_buffer_page_fill_table"); + + /* deny access to user without PROCESS privilege */ + if (check_global_access(thd, PROCESS_ACL)) { + DBUG_RETURN(0); + } + + /* Walk through each buffer pool */ + for (ulint i = 0; i < srv_buf_pool_instances; i++) { + buf_pool_t* buf_pool; + + buf_pool = buf_pool_from_array(i); + + /* Fetch information from pages in this buffer pool, + and fill the corresponding I_S table */ + status = i_s_innodb_fill_buffer_pool(thd, tables, buf_pool, i); + + /* If something wrong, break and return */ + if (status) { + break; + } + } + + DBUG_RETURN(status); +} + +/*******************************************************************//** +Bind the dynamic table INFORMATION_SCHEMA.INNODB_BUFFER_PAGE. +@return 0 on success, 1 on failure */ +static +int +i_s_innodb_buffer_page_init( +/*========================*/ + void* p) /*!< in/out: table schema object */ +{ + ST_SCHEMA_TABLE* schema; + + DBUG_ENTER("i_s_innodb_buffer_page_init"); + + schema = reinterpret_cast<ST_SCHEMA_TABLE*>(p); + + schema->fields_info = i_s_innodb_buffer_page_fields_info; + schema->fill_table = i_s_innodb_buffer_page_fill_table; + + DBUG_RETURN(0); +} + +UNIV_INTERN struct st_maria_plugin i_s_innodb_buffer_page = +{ + /* the plugin type (a MYSQL_XXX_PLUGIN value) */ + /* int */ + STRUCT_FLD(type, MYSQL_INFORMATION_SCHEMA_PLUGIN), + + /* pointer to type-specific plugin descriptor */ + /* void* */ + STRUCT_FLD(info, &i_s_info), + + /* plugin name */ + /* const char* */ + STRUCT_FLD(name, "INNODB_BUFFER_PAGE"), + + /* plugin author (for SHOW PLUGINS) */ + /* const char* */ + STRUCT_FLD(author, plugin_author), + + /* general descriptive text (for SHOW PLUGINS) */ + /* const char* */ + STRUCT_FLD(descr, "InnoDB Buffer Page Information"), + + /* the plugin license (PLUGIN_LICENSE_XXX) */ + /* int */ + STRUCT_FLD(license, PLUGIN_LICENSE_GPL), + + /* the function to invoke when plugin is loaded */ + /* int (*)(void*); */ + STRUCT_FLD(init, i_s_innodb_buffer_page_init), + + /* the function to invoke when plugin is unloaded */ + /* int (*)(void*); */ + STRUCT_FLD(deinit, i_s_common_deinit), + + /* plugin version (for SHOW PLUGINS) */ + /* unsigned int */ + STRUCT_FLD(version, INNODB_VERSION_SHORT), + + /* struct st_mysql_show_var* */ + STRUCT_FLD(status_vars, NULL), + + /* struct st_mysql_sys_var** */ + STRUCT_FLD(system_vars, NULL), + + INNODB_VERSION_STR, MariaDB_PLUGIN_MATURITY_STABLE +}; + +static ST_FIELD_INFO i_s_innodb_buf_page_lru_fields_info[] = +{ +#define IDX_BUF_LRU_POOL_ID 0 + {STRUCT_FLD(field_name, "POOL_ID"), + STRUCT_FLD(field_length, MY_INT64_NUM_DECIMAL_DIGITS), + STRUCT_FLD(field_type, MYSQL_TYPE_LONGLONG), + STRUCT_FLD(value, 0), + STRUCT_FLD(field_flags, MY_I_S_UNSIGNED), + STRUCT_FLD(old_name, ""), + STRUCT_FLD(open_method, SKIP_OPEN_TABLE)}, + +#define IDX_BUF_LRU_POS 1 + {STRUCT_FLD(field_name, "LRU_POSITION"), + STRUCT_FLD(field_length, MY_INT64_NUM_DECIMAL_DIGITS), + STRUCT_FLD(field_type, MYSQL_TYPE_LONGLONG), + STRUCT_FLD(value, 0), + STRUCT_FLD(field_flags, MY_I_S_UNSIGNED), + STRUCT_FLD(old_name, ""), + STRUCT_FLD(open_method, SKIP_OPEN_TABLE)}, + +#define IDX_BUF_LRU_PAGE_SPACE 2 + {STRUCT_FLD(field_name, "SPACE"), + STRUCT_FLD(field_length, MY_INT64_NUM_DECIMAL_DIGITS), + STRUCT_FLD(field_type, MYSQL_TYPE_LONGLONG), + STRUCT_FLD(value, 0), + STRUCT_FLD(field_flags, MY_I_S_UNSIGNED), + STRUCT_FLD(old_name, ""), + STRUCT_FLD(open_method, SKIP_OPEN_TABLE)}, + +#define IDX_BUF_LRU_PAGE_NUM 3 + {STRUCT_FLD(field_name, "PAGE_NUMBER"), + STRUCT_FLD(field_length, MY_INT64_NUM_DECIMAL_DIGITS), + STRUCT_FLD(field_type, MYSQL_TYPE_LONGLONG), + STRUCT_FLD(value, 0), + STRUCT_FLD(field_flags, MY_I_S_UNSIGNED), + STRUCT_FLD(old_name, ""), + STRUCT_FLD(open_method, SKIP_OPEN_TABLE)}, + +#define IDX_BUF_LRU_PAGE_TYPE 4 + {STRUCT_FLD(field_name, "PAGE_TYPE"), + STRUCT_FLD(field_length, 64), + STRUCT_FLD(field_type, MYSQL_TYPE_STRING), + STRUCT_FLD(value, 0), + STRUCT_FLD(field_flags, MY_I_S_MAYBE_NULL), + STRUCT_FLD(old_name, ""), + STRUCT_FLD(open_method, SKIP_OPEN_TABLE)}, + +#define IDX_BUF_LRU_PAGE_FLUSH_TYPE 5 + {STRUCT_FLD(field_name, "FLUSH_TYPE"), + STRUCT_FLD(field_length, MY_INT64_NUM_DECIMAL_DIGITS), + STRUCT_FLD(field_type, MYSQL_TYPE_LONGLONG), + STRUCT_FLD(value, 0), + STRUCT_FLD(field_flags, MY_I_S_UNSIGNED), + STRUCT_FLD(old_name, ""), + STRUCT_FLD(open_method, SKIP_OPEN_TABLE)}, + +#define IDX_BUF_LRU_PAGE_FIX_COUNT 6 + {STRUCT_FLD(field_name, "FIX_COUNT"), + STRUCT_FLD(field_length, MY_INT64_NUM_DECIMAL_DIGITS), + STRUCT_FLD(field_type, MYSQL_TYPE_LONGLONG), + STRUCT_FLD(value, 0), + STRUCT_FLD(field_flags, MY_I_S_UNSIGNED), + STRUCT_FLD(old_name, ""), + STRUCT_FLD(open_method, SKIP_OPEN_TABLE)}, + +#define IDX_BUF_LRU_PAGE_HASHED 7 + {STRUCT_FLD(field_name, "IS_HASHED"), + STRUCT_FLD(field_length, 3), + STRUCT_FLD(field_type, MYSQL_TYPE_STRING), + STRUCT_FLD(value, 0), + STRUCT_FLD(field_flags, MY_I_S_MAYBE_NULL), + STRUCT_FLD(old_name, ""), + STRUCT_FLD(open_method, SKIP_OPEN_TABLE)}, + +#define IDX_BUF_LRU_PAGE_NEWEST_MOD 8 + {STRUCT_FLD(field_name, "NEWEST_MODIFICATION"), + STRUCT_FLD(field_length, MY_INT64_NUM_DECIMAL_DIGITS), + STRUCT_FLD(field_type, MYSQL_TYPE_LONGLONG), + STRUCT_FLD(value, 0), + STRUCT_FLD(field_flags, MY_I_S_UNSIGNED), + STRUCT_FLD(old_name, ""), + STRUCT_FLD(open_method, SKIP_OPEN_TABLE)}, + +#define IDX_BUF_LRU_PAGE_OLDEST_MOD 9 + {STRUCT_FLD(field_name, "OLDEST_MODIFICATION"), + STRUCT_FLD(field_length, MY_INT64_NUM_DECIMAL_DIGITS), + STRUCT_FLD(field_type, MYSQL_TYPE_LONGLONG), + STRUCT_FLD(value, 0), + STRUCT_FLD(field_flags, MY_I_S_UNSIGNED), + STRUCT_FLD(old_name, ""), + STRUCT_FLD(open_method, SKIP_OPEN_TABLE)}, + +#define IDX_BUF_LRU_PAGE_ACCESS_TIME 10 + {STRUCT_FLD(field_name, "ACCESS_TIME"), + STRUCT_FLD(field_length, MY_INT64_NUM_DECIMAL_DIGITS), + STRUCT_FLD(field_type, MYSQL_TYPE_LONGLONG), + STRUCT_FLD(value, 0), + STRUCT_FLD(field_flags, MY_I_S_UNSIGNED), + STRUCT_FLD(old_name, ""), + STRUCT_FLD(open_method, SKIP_OPEN_TABLE)}, + +#define IDX_BUF_LRU_PAGE_TABLE_NAME 11 + {STRUCT_FLD(field_name, "TABLE_NAME"), + STRUCT_FLD(field_length, 1024), + STRUCT_FLD(field_type, MYSQL_TYPE_STRING), + STRUCT_FLD(value, 0), + STRUCT_FLD(field_flags, MY_I_S_MAYBE_NULL), + STRUCT_FLD(old_name, ""), + STRUCT_FLD(open_method, SKIP_OPEN_TABLE)}, + +#define IDX_BUF_LRU_PAGE_INDEX_NAME 12 + {STRUCT_FLD(field_name, "INDEX_NAME"), + STRUCT_FLD(field_length, 1024), + STRUCT_FLD(field_type, MYSQL_TYPE_STRING), + STRUCT_FLD(value, 0), + STRUCT_FLD(field_flags, MY_I_S_MAYBE_NULL), + STRUCT_FLD(old_name, ""), + STRUCT_FLD(open_method, SKIP_OPEN_TABLE)}, + +#define IDX_BUF_LRU_PAGE_NUM_RECS 13 + {STRUCT_FLD(field_name, "NUMBER_RECORDS"), + STRUCT_FLD(field_length, MY_INT64_NUM_DECIMAL_DIGITS), + STRUCT_FLD(field_type, MYSQL_TYPE_LONGLONG), + STRUCT_FLD(value, 0), + STRUCT_FLD(field_flags, MY_I_S_UNSIGNED), + STRUCT_FLD(old_name, ""), + STRUCT_FLD(open_method, SKIP_OPEN_TABLE)}, + +#define IDX_BUF_LRU_PAGE_DATA_SIZE 14 + {STRUCT_FLD(field_name, "DATA_SIZE"), + STRUCT_FLD(field_length, MY_INT64_NUM_DECIMAL_DIGITS), + STRUCT_FLD(field_type, MYSQL_TYPE_LONGLONG), + STRUCT_FLD(value, 0), + STRUCT_FLD(field_flags, MY_I_S_UNSIGNED), + STRUCT_FLD(old_name, ""), + STRUCT_FLD(open_method, SKIP_OPEN_TABLE)}, + +#define IDX_BUF_LRU_PAGE_ZIP_SIZE 15 + {STRUCT_FLD(field_name, "COMPRESSED_SIZE"), + STRUCT_FLD(field_length, MY_INT64_NUM_DECIMAL_DIGITS), + STRUCT_FLD(field_type, MYSQL_TYPE_LONGLONG), + STRUCT_FLD(value, 0), + STRUCT_FLD(field_flags, MY_I_S_UNSIGNED), + STRUCT_FLD(old_name, ""), + STRUCT_FLD(open_method, SKIP_OPEN_TABLE)}, + +#define IDX_BUF_LRU_PAGE_STATE 16 + {STRUCT_FLD(field_name, "COMPRESSED"), + STRUCT_FLD(field_length, 3), + STRUCT_FLD(field_type, MYSQL_TYPE_STRING), + STRUCT_FLD(value, 0), + STRUCT_FLD(field_flags, MY_I_S_MAYBE_NULL), + STRUCT_FLD(old_name, ""), + STRUCT_FLD(open_method, SKIP_OPEN_TABLE)}, + +#define IDX_BUF_LRU_PAGE_IO_FIX 17 + {STRUCT_FLD(field_name, "IO_FIX"), + STRUCT_FLD(field_length, 64), + STRUCT_FLD(field_type, MYSQL_TYPE_STRING), + STRUCT_FLD(value, 0), + STRUCT_FLD(field_flags, MY_I_S_MAYBE_NULL), + STRUCT_FLD(old_name, ""), + STRUCT_FLD(open_method, SKIP_OPEN_TABLE)}, + +#define IDX_BUF_LRU_PAGE_IS_OLD 18 + {STRUCT_FLD(field_name, "IS_OLD"), + STRUCT_FLD(field_length, 3), + STRUCT_FLD(field_type, MYSQL_TYPE_STRING), + STRUCT_FLD(value, 0), + STRUCT_FLD(field_flags, MY_I_S_MAYBE_NULL), + STRUCT_FLD(old_name, ""), + STRUCT_FLD(open_method, SKIP_OPEN_TABLE)}, + +#define IDX_BUF_LRU_PAGE_FREE_CLOCK 19 + {STRUCT_FLD(field_name, "FREE_PAGE_CLOCK"), + STRUCT_FLD(field_length, MY_INT64_NUM_DECIMAL_DIGITS), + STRUCT_FLD(field_type, MYSQL_TYPE_LONGLONG), + STRUCT_FLD(value, 0), + STRUCT_FLD(field_flags, MY_I_S_UNSIGNED), + STRUCT_FLD(old_name, ""), + STRUCT_FLD(open_method, SKIP_OPEN_TABLE)}, + + END_OF_ST_FIELD_INFO +}; + +/*******************************************************************//** +Fill Information Schema table INNODB_BUFFER_PAGE_LRU with information +cached in the buf_page_info_t array +@return 0 on success, 1 on failure */ +static +int +i_s_innodb_buf_page_lru_fill( +/*=========================*/ + THD* thd, /*!< in: thread */ + TABLE_LIST* tables, /*!< in/out: tables to fill */ + const buf_page_info_t* info_array, /*!< in: array cached page + info */ + ulint num_page) /*!< in: number of page info + cached */ +{ + TABLE* table; + Field** fields; + mem_heap_t* heap; + + DBUG_ENTER("i_s_innodb_buf_page_lru_fill"); + + table = tables->table; + + fields = table->field; + + heap = mem_heap_create(1000); + + /* Iterate through the cached array and fill the I_S table rows */ + for (ulint i = 0; i < num_page; i++) { + const buf_page_info_t* page_info; + const char* table_name; + const char* index_name; + const char* state_str; + enum buf_page_state state; + + table_name = NULL; + index_name = NULL; + state_str = NULL; + + page_info = info_array + i; + + OK(fields[IDX_BUF_LRU_POOL_ID]->store(page_info->pool_id)); + + OK(fields[IDX_BUF_LRU_POS]->store(page_info->block_id)); + + OK(fields[IDX_BUF_LRU_PAGE_SPACE]->store(page_info->space_id)); + + OK(fields[IDX_BUF_LRU_PAGE_NUM]->store(page_info->page_num)); + + OK(field_store_string( + fields[IDX_BUF_LRU_PAGE_TYPE], + i_s_page_type[page_info->page_type].type_str)); + + OK(fields[IDX_BUF_LRU_PAGE_FLUSH_TYPE]->store( + page_info->flush_type)); + + OK(fields[IDX_BUF_LRU_PAGE_FIX_COUNT]->store( + page_info->fix_count)); + + if (page_info->hashed) { + OK(field_store_string( + fields[IDX_BUF_LRU_PAGE_HASHED], "YES")); + } else { + OK(field_store_string( + fields[IDX_BUF_LRU_PAGE_HASHED], "NO")); + } + + OK(fields[IDX_BUF_LRU_PAGE_NEWEST_MOD]->store( + page_info->newest_mod, true)); + + OK(fields[IDX_BUF_LRU_PAGE_OLDEST_MOD]->store( + page_info->oldest_mod, true)); + + OK(fields[IDX_BUF_LRU_PAGE_ACCESS_TIME]->store( + page_info->access_time)); + + /* If this is an index page, fetch the index name + and table name */ + if (page_info->page_type == I_S_PAGE_TYPE_INDEX) { + const dict_index_t* index; + + mutex_enter(&dict_sys->mutex); + index = dict_index_get_if_in_cache_low( + page_info->index_id); + + /* Copy the index/table name under mutex. We + do not want to hold the InnoDB mutex while + filling the IS table */ + if (index) { + const char* name_ptr = index->name; + + if (name_ptr[0] == TEMP_INDEX_PREFIX) { + name_ptr++; + } + + index_name = mem_heap_strdup(heap, name_ptr); + + table_name = mem_heap_strdup(heap, + index->table_name); + } + + mutex_exit(&dict_sys->mutex); + } + + OK(field_store_string( + fields[IDX_BUF_LRU_PAGE_TABLE_NAME], table_name)); + + OK(field_store_string( + fields[IDX_BUF_LRU_PAGE_INDEX_NAME], index_name)); + OK(fields[IDX_BUF_LRU_PAGE_NUM_RECS]->store( + page_info->num_recs)); + + OK(fields[IDX_BUF_LRU_PAGE_DATA_SIZE]->store( + page_info->data_size)); + + OK(fields[IDX_BUF_LRU_PAGE_ZIP_SIZE]->store( + page_info->zip_ssize ? + 512 << page_info->zip_ssize : 0)); + + state = static_cast<enum buf_page_state>(page_info->page_state); + + switch (state) { + /* Compressed page */ + case BUF_BLOCK_ZIP_PAGE: + case BUF_BLOCK_ZIP_DIRTY: + state_str = "YES"; + break; + /* Uncompressed page */ + case BUF_BLOCK_FILE_PAGE: + state_str = "NO"; + break; + /* We should not see following states */ + case BUF_BLOCK_ZIP_FREE: + case BUF_BLOCK_READY_FOR_USE: + case BUF_BLOCK_NOT_USED: + case BUF_BLOCK_MEMORY: + case BUF_BLOCK_REMOVE_HASH: + state_str = NULL; + break; + }; + + OK(field_store_string(fields[IDX_BUF_LRU_PAGE_STATE], + state_str)); + + switch (page_info->io_fix) { + case BUF_IO_NONE: + OK(field_store_string(fields[IDX_BUF_LRU_PAGE_IO_FIX], + "IO_NONE")); + break; + case BUF_IO_READ: + OK(field_store_string(fields[IDX_BUF_LRU_PAGE_IO_FIX], + "IO_READ")); + break; + case BUF_IO_WRITE: + OK(field_store_string(fields[IDX_BUF_LRU_PAGE_IO_FIX], + "IO_WRITE")); + break; + } + + OK(field_store_string(fields[IDX_BUF_LRU_PAGE_IS_OLD], + (page_info->is_old) ? "YES" : "NO")); + + OK(fields[IDX_BUF_LRU_PAGE_FREE_CLOCK]->store( + page_info->freed_page_clock)); + + if (schema_table_store_record(thd, table)) { + mem_heap_free(heap); + DBUG_RETURN(1); + } + + mem_heap_empty(heap); + } + + mem_heap_free(heap); + + DBUG_RETURN(0); +} + +/*******************************************************************//** +This is the function that goes through buffer pool's LRU list +and fetch information to INFORMATION_SCHEMA.INNODB_BUFFER_PAGE_LRU. +@return 0 on success, 1 on failure */ +static +int +i_s_innodb_fill_buffer_lru( +/*=======================*/ + THD* thd, /*!< in: thread */ + TABLE_LIST* tables, /*!< in/out: tables to fill */ + buf_pool_t* buf_pool, /*!< in: buffer pool to scan */ + const ulint pool_id) /*!< in: buffer pool id */ +{ + int status = 0; + buf_page_info_t* info_buffer; + ulint lru_pos = 0; + const buf_page_t* bpage; + ulint lru_len; + mutex_t* block_mutex; + + DBUG_ENTER("i_s_innodb_fill_buffer_lru"); + + RETURN_IF_INNODB_NOT_STARTED(tables->schema_table_name); + + /* Obtain buf_pool mutex before allocate info_buffer, since + UT_LIST_GET_LEN(buf_pool->LRU) could change */ + mutex_enter(&buf_pool->LRU_list_mutex); + + lru_len = UT_LIST_GET_LEN(buf_pool->LRU); + + /* Print error message if malloc fail */ + info_buffer = (buf_page_info_t*) my_malloc( + lru_len * sizeof *info_buffer, MYF(MY_WME)); + + if (!info_buffer) { + status = 1; + goto exit; + } + + memset(info_buffer, 0, lru_len * sizeof *info_buffer); + + /* Walk through Pool's LRU list and print the buffer page + information */ + bpage = UT_LIST_GET_LAST(buf_pool->LRU); + + while (bpage != NULL) { + block_mutex = buf_page_get_mutex_enter(bpage); + /* Use the same function that collect buffer info for + INNODB_BUFFER_PAGE to get buffer page info */ + i_s_innodb_buffer_page_get_info(bpage, pool_id, lru_pos, + (info_buffer + lru_pos)); + + bpage = UT_LIST_GET_PREV(LRU, bpage); + mutex_exit(block_mutex); + + lru_pos++; + } + + ut_ad(lru_pos == lru_len); + ut_ad(lru_pos == UT_LIST_GET_LEN(buf_pool->LRU)); + +exit: + mutex_exit(&buf_pool->LRU_list_mutex); + + if (info_buffer) { + status = i_s_innodb_buf_page_lru_fill( + thd, tables, info_buffer, lru_len); + + my_free(info_buffer); + } + + DBUG_RETURN(status); +} + +/*******************************************************************//** +Fill page information for pages in InnoDB buffer pool to the +dynamic table INFORMATION_SCHEMA.INNODB_BUFFER_PAGE_LRU +@return 0 on success, 1 on failure */ +static +int +i_s_innodb_buf_page_lru_fill_table( +/*===============================*/ + THD* thd, /*!< in: thread */ + TABLE_LIST* tables, /*!< in/out: tables to fill */ + Item* ) /*!< in: condition (ignored) */ +{ + int status = 0; + + DBUG_ENTER("i_s_innodb_buf_page_lru_fill_table"); + + /* deny access to any users that do not hold PROCESS_ACL */ + if (check_global_access(thd, PROCESS_ACL)) { + DBUG_RETURN(0); + } + + /* Walk through each buffer pool */ + for (ulint i = 0; i < srv_buf_pool_instances; i++) { + buf_pool_t* buf_pool; + + buf_pool = buf_pool_from_array(i); + + /* Fetch information from pages in this buffer pool's LRU list, + and fill the corresponding I_S table */ + status = i_s_innodb_fill_buffer_lru(thd, tables, buf_pool, i); + + /* If something wrong, break and return */ + if (status) { + break; + } + } + + DBUG_RETURN(status); +} + +/*******************************************************************//** +Bind the dynamic table INFORMATION_SCHEMA.INNODB_BUFFER_PAGE_LRU. +@return 0 on success, 1 on failure */ +static +int +i_s_innodb_buffer_page_lru_init( +/*============================*/ + void* p) /*!< in/out: table schema object */ +{ + ST_SCHEMA_TABLE* schema; + + DBUG_ENTER("i_s_innodb_buffer_page_lru_init"); + + schema = reinterpret_cast<ST_SCHEMA_TABLE*>(p); + + schema->fields_info = i_s_innodb_buf_page_lru_fields_info; + schema->fill_table = i_s_innodb_buf_page_lru_fill_table; + + DBUG_RETURN(0); +} + +UNIV_INTERN struct st_maria_plugin i_s_innodb_buffer_page_lru = +{ + /* the plugin type (a MYSQL_XXX_PLUGIN value) */ + /* int */ + STRUCT_FLD(type, MYSQL_INFORMATION_SCHEMA_PLUGIN), + + /* pointer to type-specific plugin descriptor */ + /* void* */ + STRUCT_FLD(info, &i_s_info), + + /* plugin name */ + /* const char* */ + STRUCT_FLD(name, "INNODB_BUFFER_PAGE_LRU"), + + /* plugin author (for SHOW PLUGINS) */ + /* const char* */ + STRUCT_FLD(author, plugin_author), + + /* general descriptive text (for SHOW PLUGINS) */ + /* const char* */ + STRUCT_FLD(descr, "InnoDB Buffer Page in LRU"), + + /* the plugin license (PLUGIN_LICENSE_XXX) */ + /* int */ + STRUCT_FLD(license, PLUGIN_LICENSE_GPL), + + /* the function to invoke when plugin is loaded */ + /* int (*)(void*); */ + STRUCT_FLD(init, i_s_innodb_buffer_page_lru_init), + + /* the function to invoke when plugin is unloaded */ + /* int (*)(void*); */ + STRUCT_FLD(deinit, i_s_common_deinit), + + /* plugin version (for SHOW PLUGINS) */ + /* unsigned int */ + STRUCT_FLD(version, INNODB_VERSION_SHORT), + + /* struct st_mysql_show_var* */ + STRUCT_FLD(status_vars, NULL), + + /* struct st_mysql_sys_var** */ + STRUCT_FLD(system_vars, NULL), + + INNODB_VERSION_STR, MariaDB_PLUGIN_MATURITY_STABLE +}; + /*******************************************************************//** Unbind a dynamic INFORMATION_SCHEMA table. @return 0 on success */ |