标签：tor pre 写入 参数 logs bash ted bsp sql
log_output=‘FILE‘表示将日志存入文件,默认值是‘FILE‘ log_output=‘TABLE‘表示将日志存入数据库,这样日志信息就会被写入到mysql.slow_log表中.
mysql数据库支持同时两种日志存储方式,配置的时候以逗号隔开即可,如:log_output=‘FILE,TABLE‘.日志记录到系统专用日志表中,要比记录到文件耗费更多的系统资源,因此对于需要启用慢查日志,又需要比够获得更高的系统性能,那么建议优先记录到文件.
mysql> show variables like ‘%log_output%‘; +---------------+-------+ | Variable_name | Value | +---------------+-------+ | log_output | FILE | +---------------+-------+ 1 row in set (0.00 sec)
但设置:log_output=‘TABLE‘时,在线查询的时候,报错!!!
后来通过下面的设置问题解决:
mysql> show variables like ‘%log_output%‘; +---------------+-------+ | Variable_name | Value | +---------------+-------+ | log_output | TABLE | +---------------+-------+ 1 row in set (0.00 sec) mysql> set global log_output=‘FILE‘; Query OK, 0 rows affected (0.00 sec) mysql> select @@global.log_output; +---------------------+ | @@global.log_output | +---------------------+ | FILE | +---------------------+ 1 row in set (0.00 sec) mysql> set @@global.slow_query_log = ON; Query OK, 0 rows affected (0.00 sec) mysql> set @@global.log_output=‘TABLE‘; Query OK, 0 rows affected (0.00 sec) mysql> show create table mysql.slow_log; +----------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+ | Table | Create Table | +----------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+ | slow_log | CREATE TABLE `slow_log` ( `start_time` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP, `user_host` mediumtext NOT NULL, `query_time` time NOT NULL, `lock_time` time NOT NULL, `rows_sent` int(11) NOT NULL, `rows_examined` int(11) NOT NULL, `db` varchar(512) NOT NULL, `last_insert_id` int(11) NOT NULL, `insert_id` int(11) NOT NULL, `server_id` int(10) unsigned NOT NULL, `sql_text` mediumtext NOT NULL ) ENGINE=CSV DEFAULT CHARSET=utf8 COMMENT=‘Slow log‘ | +----------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+ 1 row in set (0.00 sec)
mysql> select * from mysql.slow_log limit 4\G;
*************************** 1. row ***************************
start_time: 2017-05-06 14:13:48
user_host: zabbix[zabbix] @ localhost []
query_time: 00:00:00
lock_time: 00:00:00
rows_sent: 1
rows_examined: 1
db: zabbix
last_insert_id: 0
insert_id: 0
server_id: 1
sql_text: SELECT dv.mandatory,dv.optional FROM dbversion dv
*************************** 2. row ***************************
start_time: 2017-05-06 14:13:48
user_host: zabbix[zabbix] @ localhost []
query_time: 00:00:00
lock_time: 00:00:00
rows_sent: 1
rows_examined: 1
db: zabbix
last_insert_id: 0
insert_id: 0
server_id: 1
sql_text: SELECT dv.mandatory,dv.optional FROM dbversion dv
*************************** 3. row ***************************
start_time: 2017-05-06 14:13:48
user_host: zabbix[zabbix] @ localhost []
query_time: 00:00:00
lock_time: 00:00:00
rows_sent: 1
rows_examined: 1
db: zabbix
last_insert_id: 0
insert_id: 0
server_id: 1
sql_text: SELECT dv.mandatory,dv.optional FROM dbversion dv
*************************** 4. row ***************************
start_time: 2017-05-06 14:13:48
user_host: zabbix[zabbix] @ localhost []
query_time: 00:00:00
lock_time: 00:00:00
rows_sent: 1
rows_examined: 1
db: zabbix
last_insert_id: 0
insert_id: 0
server_id: 1
sql_text: SELECT dv.mandatory,dv.optional FROM dbversion dv
4 rows in set (0.00 sec)
ERROR:
No query specified
mysql> select @@global.slow_query_log; +-------------------------+ | @@global.slow_query_log | +-------------------------+ | 1 | +-------------------------+ 1 row in set (0.00 sec)
标签：tor pre 写入 参数 logs bash ted bsp sql
原文地址：http://www.cnblogs.com/bass6/p/6816877.html
