操作系统/ mysql版本:

$ uname -a
Darwin Raphaels-MacBook-Pro.local 15.6.0 Darwin Kernel Version 15.6.0: Thu Jun 21 20:07:40 PDT 2018; root:xnu-3248.73.11~1/RELEASE_X86_64 x86_64

$ mysql --version
/usr/local/mysql/bin/mysql  Ver 14.14 Distrib 5.6.23, for osx10.8 (x86_64) using  EditLine wrapper

添加日志记录(例如，我不认为/var/log/…是Mac OS上的最佳路径，但这是有效的:

sudo vi ./usr/local/mysql-5.6.23-osx10.8-x86_64/my.cnf

[mysqld]
general_log = on
general_log_file=/var/log/mysql/mysqld_general.log

重新启动Mysql

结果:

$ sudo tail -f /var/log/mysql/mysqld_general.log
181210  9:41:04    21 Connect   root@localhost on employees
           21 Query /* mysql-connector-java-5.1.47 ( Revision: fe1903b1ecb4a96a917f7ed3190d80c049b1de29 ) */SELECT  @@session.auto_increment_increment AS auto_increment_increment, @@character_set_client AS character_set_client, @@character_set_connection AS character_set_connection, @@character_set_results AS character_set_results, @@character_set_server AS character_set_server, @@collation_server AS collation_server, @@collation_connection AS collation_connection, @@init_connect AS init_connect, @@interactive_timeout AS interactive_timeout, @@license AS license, @@lower_case_table_names AS lower_case_table_names, @@max_allowed_packet AS max_allowed_packet, @@net_buffer_length AS net_buffer_length, @@net_write_timeout AS net_write_timeout, @@query_cache_size AS query_cache_size, @@query_cache_type AS query_cache_type, @@sql_mode AS sql_mode, @@system_time_zone AS system_time_zone, @@time_zone AS time_zone, @@tx_isolation AS transaction_isolation, @@wait_timeout AS wait_timeout
           21 Query SET NAMES latin1
           21 Query SET character_set_results = NULL
           21 Query SET autocommit=1
           21 Query SELECT USER()
           21 Query SELECT USER()
181210  9:41:10    21 Query show tables
181210  9:41:25    21 Query select count(*) from current_dept_emp

更新:不再适用于mysql 5.6+

使用——log选项启动mysql:

mysqld --log=log_file_name

或者将以下内容放在my.cnf文件中:

log = log_file_name

任何一个都将把所有查询记录到log_file_name。

您也可以使用——log-slow-queries选项而不是——log只记录慢查询。默认情况下，需要10秒或更长时间的查询被认为是慢查询，您可以通过将long_query_time设置为查询在被记录日志之前必须执行的秒数来改变这一点。

(注意:对于mysql-5.6+，这将不起作用。如果你向下滚动或点击这里，有一个适用于mysql-5.6+的解决方案。)

如果你不想或者不能重新启动MySQL服务器，你可以在你正在运行的服务器上这样做:

在mysql数据库上创建日志表

  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,
   `thread_id` bigint(21) unsigned NOT NULL
  ) ENGINE=CSV DEFAULT CHARSET=utf8 COMMENT='Slow log'

  CREATE TABLE `general_log` (
   `event_time` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP
                          ON UPDATE CURRENT_TIMESTAMP,
   `user_host` mediumtext NOT NULL,
   `thread_id` bigint(21) unsigned NOT NULL,
   `server_id` int(10) unsigned NOT NULL,
   `command_type` varchar(64) NOT NULL,
   `argument` mediumtext NOT NULL
  ) ENGINE=CSV DEFAULT CHARSET=utf8 COMMENT='General log'

启用数据库的查询日志

SET global general_log = 1;
SET global log_output = 'table';

查看日志

select * from mysql.general_log

禁用数据库查询日志

SET global general_log = 0;

打开表的日志

mysql> SET GLOBAL general_log = 'ON';
mysql> SET GLOBAL log_output = 'table';

通过select query查看日志

SELECT * FROM mysql.general_log

如果查询太多，则截断表:

TRUNCATE table mysql.general_log;

值得一提的是，general_log和slow_log是在5.1.6中引入的:

http://dev.mysql.com/doc/refman/5.1/en/log-destinations.html

5.2.1. 选择常规查询和慢速查询日志输出目的地 从MySQL 5.1.6开始，MySQL服务器提供了灵活的控制 输出到一般查询日志和慢速查询日志的目的地， 如果启用了这些日志。日志条目的可能目的地是 日志文件或mysql中的general_log和slow_log表 数据库

除了我在这里遇到的方法之外，运行下面的方法是在不重新启动的情况下将查询转储到日志文件的最简单方法

SET global log_output = 'FILE';
SET global general_log_file='/Applications/MAMP/logs/mysql_general.log';
SET global general_log = 1;

可以关机用吗

SET global general_log = 0;