diff options
Diffstat (limited to 'storage/innobase/srv/srv0srv.c')
| -rw-r--r-- | storage/innobase/srv/srv0srv.c | 24 |
1 files changed, 19 insertions, 5 deletions
diff --git a/storage/innobase/srv/srv0srv.c b/storage/innobase/srv/srv0srv.c index 5b1184fb416..3f6f1982992 100644 --- a/storage/innobase/srv/srv0srv.c +++ b/storage/innobase/srv/srv0srv.c @@ -218,6 +218,11 @@ ulong srv_max_buf_pool_modified_pct = 90; /* variable counts amount of data read in total (in bytes) */ ulint srv_data_read = 0; +/* Internal setting for "innodb_stats_method". Decides how InnoDB treats +NULL value when collecting statistics. By default, it is set to +SRV_STATS_NULLS_EQUAL(0), ie. all NULL value are treated equal */ +ulong srv_innodb_stats_method = SRV_STATS_NULLS_EQUAL; + /* here we count the amount of data written in total (in bytes) */ ulint srv_data_written = 0; @@ -2175,9 +2180,15 @@ srv_error_monitor_thread( os_thread_create */ { /* number of successive fatal timeouts observed */ - ulint fatal_cnt = 0; - dulint old_lsn; - dulint new_lsn; + ulint fatal_cnt = 0; + dulint old_lsn; + dulint new_lsn; + /* longest waiting thread for a semaphore */ + os_thread_id_t waiter = os_thread_get_curr_id(); + os_thread_id_t old_waiter = waiter; + /* the semaphore that is being waited for */ + const void* sema = NULL; + const void* old_sema = NULL; old_lsn = srv_start_lsn; @@ -2219,10 +2230,11 @@ loop: /* In case mutex_exit is not a memory barrier, it is theoretically possible some threads are left waiting though the semaphore is already released. Wake up those threads: */ - + sync_arr_wake_threads_if_sema_free(); - if (sync_array_print_long_waits()) { + if (sync_array_print_long_waits(&waiter, &sema) + && sema == old_sema && os_thread_eq(waiter, old_waiter)) { fatal_cnt++; if (fatal_cnt > 10) { @@ -2237,6 +2249,8 @@ loop: } } else { fatal_cnt = 0; + old_waiter = waiter; + old_sema = sema; } /* Flush stderr so that a database user gets the output |