MySQL5.7慢查询日志时间与系统时间差8小时原因详解

在对慢查询进行查看的时候发现时间不对，正好与系统时间相差8个小时。

1、慢查询显示时间如下

# Time: 2020-01-10T06:42:24.940811Z

$ dateFri Jan 10 14:42:31 CST 2020

mysql> show variables like 'log_timestamps';+----------------+-------+| Variable_name | Value |+----------------+-------+| log_timestamps | UTC  |+----------------+-------+1 row in set (0.00 sec)

log_timestamps

Property Value
Command-Line Format --log-timestamps=#
Introduced 5.7.2
System Variable log_timestamps
Scope Global
Dynamic Yes
Type Enumeration
Default Value UTC
Valid Values
UTC

SYSTEM

This variable controls the time zone of timestamps in messages written to the error log, and in general query log and slow query log messages written to files. It does not affect the time zone of general query log and slow query log messages written to tables (mysql.general_log, mysql.slow_log). Rows retrieved from those tables can be converted from the local system time zone to any desired time zone with CONVERT_TZ() or by setting the session time_zone system variable.

Permitted log_timestamps values are UTC (the default) and SYSTEM (local system time zone).

Timestamps are written using ISO 8601 / RFC 3339 format: YYYY-MM-DDThh:mm:ss.uuuuuu plus a tail value of Z signifying Zulu time (UTC) or ±hh:mm (an offset from UTC).

修改参数就可以解决问题。

mysql> SET GLOBAL log_timestamps = SYSTEM;Query OK, 0 rows affected (0.00 sec)mysql> SHOW GLOBAL VARIABLES LIKE 'log_timestamps';+----------------+--------+| Variable_name | Value |+----------------+--------+| log_timestamps | SYSTEM |+----------------+--------+

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