mysql查看數(shù)據(jù)庫操作記錄

MySQL的查詢?nèi)罩居涗浟怂蠱ySQL數(shù)據(jù)庫請求的信息。無論這些請求是否得到了正確的執(zhí)行。默認(rèn)文件名為hostname.log。默認(rèn)情況下MySQL查詢?nèi)罩臼顷P(guān)閉的。生產(chǎn)環(huán)境，如果開啟MySQL查詢?nèi)罩?#xff0c;對性能還是有蠻大的影響的。另外很多時候，MySQL慢查詢?nèi)罩净究梢远ㄎ荒切┏霈F(xiàn)性能問題的SQL，所以MySQL查詢?nèi)罩緫?yīng)用的場景其實不多，有點(diǎn)雞肋的感覺，它跟SQL Server中的profiler有點(diǎn)類似，但是這個不能跟蹤某個會話、用戶、客戶端。它只能對整個數(shù)據(jù)庫進(jìn)行跟蹤。

window 環(huán)境下

• 找到my.ini,在下面添加：
  log=存放日志的路徑/my.log
• 保存文件，重啟mysql服務(wù)，之后就可以在對應(yīng)目錄的下找到my.log文件。

linux環(huán)境下

• MySQL中的參數(shù)general_log用來控制開啟、關(guān)閉MySQL查詢?nèi)罩?參數(shù)general_log_file用來控制查詢?nèi)罩镜奈恢?。所以如果你要判斷MySQL數(shù)據(jù)庫是否開啟了查詢?nèi)罩?#xff0c;可以使用下面命令。general_log為ON表示開啟查詢?nèi)罩?#xff0c;OFF表示關(guān)閉查詢?nèi)罩尽?/li>

mysql> show variables like '%general_log%'; +------------------+------------------------------+ | Variable_name | Value | +------------------+------------------------------+ | general_log | OFF | | general_log_file | /var/lib/mysql/DB-Server.log | +------------------+------------------------------+ 2 rows in set (0.00 sec) mysql>

• 另外，MySQL的查詢?nèi)罩局С謱懭胛募驅(qū)懭霐?shù)據(jù)表兩種形式，這個由參數(shù)log_output控制，如下所示：

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

• 1、開啟MySQL查詢?nèi)罩?/li>

mysql> set global general_log = on; Query OK, 0 rows affected (0.11 sec)mysql> show variables like 'general_log'; +---------------+-------+ | Variable_name | Value | +---------------+-------+ | general_log | ON | +---------------+-------+ 1 row in set (0.02 sec)mysql>

• 2：關(guān)閉MySQL查詢?nèi)罩?/li>

mysql> show variables like 'general_log'; +---------------+-------+ | Variable_name | Value | +---------------+-------+ | general_log | ON | +---------------+-------+ 1 row in set (0.01 sec)mysql> set global general_log=off; Query OK, 0 rows affected (0.01 sec)mysql> show variables like 'general_log'; +---------------+-------+ | Variable_name | Value | +---------------+-------+ | general_log | OFF | +---------------+-------+ 1 row in set (0.00 sec)mysql>

• 3：設(shè)置日志輸出方式為表（如果設(shè)置log_output=table的話，則日志結(jié)果會記錄到名為gengera_log的表中，這表的默認(rèn)引擎是CSV）：

mysql> show variables like 'log_output'; +---------------+-------+ | Variable_name | Value | +---------------+-------+ | log_output | FILE | +---------------+-------+ 1 row in set (0.00 sec)mysql> set global log_output='table'; Query OK, 0 rows affected (0.00 sec)mysql> show variables like 'log_output'; +---------------+-------+ | Variable_name | Value | +---------------+-------+ | log_output | TABLE | +---------------+-------+ 1 row in set (0.01 sec)mysql>

• 4.查看查詢?nèi)罩拘畔ⅰ?/li>

mysql> select * from mysql.general_log; +---------------------+---------------------------+-----------+-----------+--------------+----------------------------------+ | event_time | user_host | thread_id | server_id | command_type | argument | +---------------------+---------------------------+-----------+-----------+--------------+----------------------------------+ | 2017-07-06 12:32:05 | root[root] @ localhost [] | 1 | 1 | Query | show variables like 'general%' | | 2017-07-06 12:32:28 | root[root] @ localhost [] | 1 | 1 | Query | show variables like 'log_output' | | 2017-07-06 12:32:41 | root[root] @ localhost [] | 1 | 1 | Query | select * from MyDB.test | | 2017-07-06 12:34:36 | [root] @ localhost [] | 3 | 1 | Connect | root@localhost on | | 2017-07-06 12:34:36 | root[root] @ localhost [] | 3 | 1 | Query | KILL QUERY 1 | | 2017-07-06 12:34:36 | root[root] @ localhost [] | 3 | 1 | Quit | | | 2017-07-06 12:34:51 | root[root] @ localhost [] | 1 | 1 | Query | select * from mysql.general_log | +---------------------+---------------------------+-----------+-----------+--------------+----------------------------------+ 7 rows in set (0.02 sec)mysql>

參考：https://www.cnblogs.com/kerrycode/p/7130403.html

轉(zhuǎn)載于:https://www.cnblogs.com/frankltf/p/8723944.html

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