Bagaimana untuk melihat rekod operasi pangkalan data mysql di bawah Linux

Kaedah khusus untuk melihat rekod operasi pangkalan data mysql di bawah Linux

Parameter general_log dalam MySQL digunakan untuk mengawal pembukaan dan penutupan log pertanyaan MySQL , dan parameter general_log_file digunakan untuk mengawal Pertanyaan lokasi log. Jika anda ingin menentukan sama ada pangkalan data MySQL telah mengaktifkan pengelogan pertanyaan, anda boleh menggunakan arahan berikut. Jika general_log ditetapkan kepada HIDUP, log pertanyaan akan dihidupkan; jika ia ditetapkan kepada MATI, log pertanyaan akan dimatikan.

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)

Selain itu, log pertanyaan MySQL menyokong menulis ke fail atau menulis ke jadual data Ini dikawal oleh parameter log_output, seperti yang ditunjukkan di bawah:

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

Dayakan log pertanyaan MySQL

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)

.

Tutup log pertanyaan MySQL

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)

Tetapkan mod keluaran log kepada jadual

Jika log_output=jadual ditetapkan, keputusan log akan direkodkan ke jadual bernama genera_log Jadual ini enjin ialah 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)

Lihat maklumat log pertanyaan.

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)

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