mysql> show warnings; +---------+------+------------------------------------------------------+ | Level | Code | Message | +---------+------+------------------------------------------------------+ | Warning | 1292 | Truncated incorrect binlog_cache_size value: '33792' | +---------+------+------------------------------------------------------+ 1 row in set (0.0 SET GLOBAL binlog_format = 'STATEMENT'; SET GLOBAL binlog_format = 'ROW'; SET GLOBAL binlog_format = 'MIXED'; SET SESSION binlog_format = 'STATEMENT'; SET SESSION binlog_format = 'ROW'; SET SESSION binlog_format = 'MIXED';
mysql> SHOW global variables like '%general%'; +------------------+---------------------------+ | Variable_name | Value | +------------------+---------------------------+ | general_log | OFF | | general_log_file | /data/my3306/centos65.log | +------------------+---------------------------+
set global general_log=1; set global general_log_file='/data/my3306/centos65_general.log';
mysql> SHOW global variables like '%general%'; +------------------+-----------------------------------+ | Variable_name | Value | +------------------+-----------------------------------+ | general_log | ON | | general_log_file | /data/my3306/centos65_general.log | +------------------+-----------------------------------+ 2 rows in set (0.00 sec)
################# slow_query_log
mysql> show variables like '%slow%'; +---------------------------+--------------------------------+ | Variable_name | Value | +---------------------------+--------------------------------+ | log_slow_admin_statements | OFF | | log_slow_slave_statements | OFF | | slow_launch_time | 2 | | slow_query_log | OFF | | slow_query_log_file | /data/my3306/centos65-slow.log | +---------------------------+--------------------------------+ 5 rows in set (0.00 sec)
mysql> set global slow_query_log=1; Query OK, 0 rows affected (0.33 sec)
mysql> set global long_query_time=1; Query OK, 0 rows affected (0.00 sec)
mysql> show variables like '%quer%'; +----------------------------------------+--------------------------------+ | Variable_name | Value | +----------------------------------------+--------------------------------+ | binlog_rows_query_log_events | OFF | | ft_query_expansion_limit | 20 | | have_query_cache | YES | | log_queries_not_using_indexes | OFF | | log_throttle_queries_not_using_indexes | 0 | | long_query_time | 1.000000 | | query_alloc_block_size | 8192 | | query_cache_limit | 1048576 | | query_cache_min_res_unit | 4096 | | query_cache_size | 1048576 | | query_cache_type | OFF | | query_cache_wlock_invalidate | OFF | | query_prealloc_size | 8192 | | slow_query_log | ON | | slow_query_log_file | /data/my3306/centos65-slow.log | +----------------------------------------+--------------------------------+ 15 rows in set (0.00 sec) ################# innodb_log_file
To change the number or the size of your InnoDB redo log files, perform the following steps:
1 Stop the MySQL server and make sure that it shuts down without errors.
2 Edit my.cnf to change the log file configuration. To change the log file size, configure innodb_log_file_size. To increase the number of log files, configure innodb_log_files_in_group.
3 Start the MySQL server again.
If InnoDB detects that the innodb_log_file_size differs from the redo log file size, it will write a log checkpoint, close and remove the old log files, create new log files at the requested size, and open the new log files.
