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DROP TABLE IF EXISTS t1;
select variable_value from information_schema.global_status where variable_name="handler_read_key" into @global_read_key;
show columns from information_schema.client_statistics;
Field Type Null Key Default Extra
CLIENT varchar(64) NO
TOTAL_CONNECTIONS bigint(21) NO 0
CONCURRENT_CONNECTIONS bigint(21) NO 0
CONNECTED_TIME bigint(21) NO 0
BUSY_TIME double NO 0
CPU_TIME double NO 0
BYTES_RECEIVED bigint(21) NO 0
BYTES_SENT bigint(21) NO 0
BINLOG_BYTES_WRITTEN bigint(21) NO 0
ROWS_READ bigint(21) NO 0
ROWS_SENT bigint(21) NO 0
ROWS_DELETED bigint(21) NO 0
ROWS_INSERTED bigint(21) NO 0
ROWS_UPDATED bigint(21) NO 0
SELECT_COMMANDS bigint(21) NO 0
UPDATE_COMMANDS bigint(21) NO 0
OTHER_COMMANDS bigint(21) NO 0
COMMIT_TRANSACTIONS bigint(21) NO 0
ROLLBACK_TRANSACTIONS bigint(21) NO 0
DENIED_CONNECTIONS bigint(21) NO 0
LOST_CONNECTIONS bigint(21) NO 0
ACCESS_DENIED bigint(21) NO 0
EMPTY_QUERIES bigint(21) NO 0
TOTAL_SSL_CONNECTIONS bigint(21) unsigned NO 0
MAX_STATEMENT_TIME_EXCEEDED bigint(21) NO 0
show columns from information_schema.user_statistics;
Field Type Null Key Default Extra
USER varchar(128) NO
TOTAL_CONNECTIONS int(11) NO 0
CONCURRENT_CONNECTIONS int(11) NO 0
CONNECTED_TIME int(11) NO 0
BUSY_TIME double NO 0
CPU_TIME double NO 0
BYTES_RECEIVED bigint(21) NO 0
BYTES_SENT bigint(21) NO 0
BINLOG_BYTES_WRITTEN bigint(21) NO 0
ROWS_READ bigint(21) NO 0
ROWS_SENT bigint(21) NO 0
ROWS_DELETED bigint(21) NO 0
ROWS_INSERTED bigint(21) NO 0
ROWS_UPDATED bigint(21) NO 0
SELECT_COMMANDS bigint(21) NO 0
UPDATE_COMMANDS bigint(21) NO 0
OTHER_COMMANDS bigint(21) NO 0
COMMIT_TRANSACTIONS bigint(21) NO 0
ROLLBACK_TRANSACTIONS bigint(21) NO 0
DENIED_CONNECTIONS bigint(21) NO 0
LOST_CONNECTIONS bigint(21) NO 0
ACCESS_DENIED bigint(21) NO 0
EMPTY_QUERIES bigint(21) NO 0
TOTAL_SSL_CONNECTIONS bigint(21) unsigned NO 0
MAX_STATEMENT_TIME_EXCEEDED bigint(21) NO 0
show columns from information_schema.index_statistics;
Field Type Null Key Default Extra
TABLE_SCHEMA varchar(192) NO
TABLE_NAME varchar(192) NO
INDEX_NAME varchar(192) NO
ROWS_READ bigint(21) NO 0
show columns from information_schema.table_statistics;
Field Type Null Key Default Extra
TABLE_SCHEMA varchar(192) NO
TABLE_NAME varchar(192) NO
ROWS_READ bigint(21) NO 0
ROWS_CHANGED bigint(21) NO 0
ROWS_CHANGED_X_INDEXES bigint(21) NO 0
set @save_general_log=@@global.general_log;
set @@global.general_log=0;
set @@global.userstat=1;
flush status;
create table t1 (a int, primary key (a), b int default 0) engine=innodb;
insert into t1 (a) values (1),(2),(3),(4);
update t1 set b=1;
update t1 set b=5 where a=2;
delete from t1 where a=3;
/* Empty query */
select * from t1 where a=999;
a b
drop table t1;
SELECT (VARIABLE_VALUE <> '') AS have_ssl FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME='Ssl_cipher';
have_ssl
1
create table t1 (a int, primary key (a), b int default 0) engine=innodb;
begin;
insert into t1 values(1,1);
commit;
begin;
insert into t1 values(2,2);
commit;
begin;
insert into t1 values(3,3);
rollback;
drop table t1;
select sleep(1);
sleep(1)
0
show status like "rows%";
Variable_name Value
Rows_read 6
Rows_sent 1
Rows_tmp_read 0
show status like "ha%";
Variable_name Value
Handler_commit 19
Handler_delete 1
Handler_discover 0
Handler_external_lock 0
Handler_icp_attempts 0
Handler_icp_match 0
Handler_mrr_init 0
Handler_mrr_key_refills 0
Handler_mrr_rowid_refills 0
Handler_prepare 18
Handler_read_first 0
Handler_read_key 9
Handler_read_last 0
Handler_read_next 0
Handler_read_prev 0
Handler_read_retry 0
Handler_read_rnd 0
Handler_read_rnd_deleted 0
Handler_read_rnd_next 5
Handler_rollback 2
Handler_savepoint 0
Handler_savepoint_rollback 0
Handler_tmp_update 0
Handler_tmp_write 0
Handler_update 5
Handler_write 7
select variable_value - @global_read_key as "handler_read_key" from information_schema.global_status where variable_name="handler_read_key";
handler_read_key
9
set @@global.userstat=0;
select * from information_schema.index_statistics;
TABLE_SCHEMA TABLE_NAME INDEX_NAME ROWS_READ
select * from information_schema.table_statistics;
TABLE_SCHEMA TABLE_NAME ROWS_READ ROWS_CHANGED ROWS_CHANGED_X_INDEXES
show table_statistics;
Table_schema Table_name Rows_read Rows_changed Rows_changed_x_#indexes
show index_statistics;
Table_schema Table_name Index_name Rows_read
select TOTAL_CONNECTIONS, TOTAL_SSL_CONNECTIONS, CONCURRENT_CONNECTIONS, ROWS_READ, ROWS_SENT, ROWS_DELETED, ROWS_INSERTED, ROWS_UPDATED, SELECT_COMMANDS, UPDATE_COMMANDS, OTHER_COMMANDS, COMMIT_TRANSACTIONS, ROLLBACK_TRANSACTIONS, DENIED_CONNECTIONS, LOST_CONNECTIONS, ACCESS_DENIED, EMPTY_QUERIES from information_schema.client_statistics;;
TOTAL_CONNECTIONS 2
TOTAL_SSL_CONNECTIONS 1
CONCURRENT_CONNECTIONS 0
ROWS_READ 6
ROWS_SENT 3
ROWS_DELETED 1
ROWS_INSERTED 7
ROWS_UPDATED 5
SELECT_COMMANDS 4
UPDATE_COMMANDS 11
OTHER_COMMANDS 7
COMMIT_TRANSACTIONS 19
ROLLBACK_TRANSACTIONS 2
DENIED_CONNECTIONS 0
LOST_CONNECTIONS 0
ACCESS_DENIED 0
EMPTY_QUERIES 1
select TOTAL_CONNECTIONS, TOTAL_SSL_CONNECTIONS, CONCURRENT_CONNECTIONS, ROWS_READ, ROWS_SENT, ROWS_DELETED, ROWS_INSERTED, ROWS_UPDATED, SELECT_COMMANDS, UPDATE_COMMANDS, OTHER_COMMANDS, COMMIT_TRANSACTIONS, ROLLBACK_TRANSACTIONS, DENIED_CONNECTIONS, LOST_CONNECTIONS, ACCESS_DENIED, EMPTY_QUERIES from information_schema.user_statistics;;
TOTAL_CONNECTIONS 2
TOTAL_SSL_CONNECTIONS 1
CONCURRENT_CONNECTIONS 0
ROWS_READ 6
ROWS_SENT 3
ROWS_DELETED 1
ROWS_INSERTED 7
ROWS_UPDATED 5
SELECT_COMMANDS 4
UPDATE_COMMANDS 11
OTHER_COMMANDS 7
COMMIT_TRANSACTIONS 19
ROLLBACK_TRANSACTIONS 2
DENIED_CONNECTIONS 0
LOST_CONNECTIONS 0
ACCESS_DENIED 0
EMPTY_QUERIES 1
flush table_statistics;
flush index_statistics;
select * from information_schema.index_statistics;
TABLE_SCHEMA TABLE_NAME INDEX_NAME ROWS_READ
select * from information_schema.table_statistics;
TABLE_SCHEMA TABLE_NAME ROWS_READ ROWS_CHANGED ROWS_CHANGED_X_INDEXES
show status like "%generic%";
Variable_name Value
Com_show_generic 2
select connected_time <> 0, busy_time <> 0, bytes_received <> 0,
bytes_sent <> 0, binlog_bytes_written <> 0
from information_schema.user_statistics;
connected_time <> 0 busy_time <> 0 bytes_received <> 0 bytes_sent <> 0 binlog_bytes_written <> 0
1 1 1 1 1
select connected_time <> 0, busy_time <> 0, bytes_received <> 0,
bytes_sent <> 0, binlog_bytes_written <> 0
from information_schema.client_statistics;
connected_time <> 0 busy_time <> 0 bytes_received <> 0 bytes_sent <> 0 binlog_bytes_written <> 0
1 1 1 1 1
create table t1 (a int) engine=innodb;
select @@in_transaction;
@@in_transaction
0
begin;
select @@in_transaction;
@@in_transaction
1
insert into t1 values (1);
select @@in_transaction;
@@in_transaction
1
commit;
select @@in_transaction;
@@in_transaction
0
set @@autocommit=0;
select @@in_transaction;
@@in_transaction
0
insert into t1 values (2);
select @@in_transaction;
@@in_transaction
1
set @@autocommit=1;
select @@in_transaction;
@@in_transaction
0
drop table t1;
set @@global.general_log=@save_general_log;
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