南大通用数据库-Gbase-8a-学习-38-常规日志（general log）

目录

一、环境信息

二、general log的用途

三、general log相关参数介绍

四、LInux环境模拟实验

1、查看参数配置

2、开启general log

3、输入测试SQL

4、查看文件级别general log

5、改为表级别general log

6、再次输入测试SQL

7、查看gbase.general_log

---

一、环境信息

名称	值
CPU	Intel(R) Core(TM) i5-1035G1 CPU @ 1.00GHz
操作系统	CentOS Linux release 7.9.2009 (Core)
内存	3G
逻辑核数	2
Gbase8a版本	8.6.2-R43.34.27468a27

二、general log的用途

记录数据库曾经执行过的 SQL 语句,相较于审计日志记录的内容更加粗一些，并且是全部记录，没有针对性，例如需要记录哪些类型的SQL，耗时多少的SQL需要记录等都没有相关配置。

审计日志的相关内容介绍请参考之前的博客

《南大通用数据库-Gbase-8a-学习-05-通过审计日志抓取Sql、Trace日志查看执行计划》。

三、general log相关参数介绍

参数名	描述
general_log	ON为开启，OFF为关闭。开启和关闭general log的开关。
general_log_file	当log_output为FILE时，general log输出的日志路径。
log_output	log_output分为FILE和TABLE，表示日志的输出形式，是存在文件中，还是存在数据字典表中。此参数如果改动，会影响其他日志如审计日志的生成方式，请注意。

四、LInux环境模拟实验

1、查看参数配置

gbase> show variables like '%general_log%';
+------------------+------------------------------------------+
| Variable_name    | Value                                    |
+------------------+------------------------------------------+
| general_log      | OFF                                      |
| general_log_file | /opt/gcluster/log/gcluster/gclusterd.log |
+------------------+------------------------------------------+
2 rows in set (Elapsed: 00:00:00.03)

gbase> show variables like '%log_output%';
+---------------+-------+
| Variable_name | Value |
+---------------+-------+
| log_output    | FILE  |
+---------------+-------+
1 row in set (Elapsed: 00:00:00.01)

2、开启general log

gbase> set global general_log=1;
Query OK, 0 rows affected (Elapsed: 00:00:00.19)

3、输入测试SQL

gbase> use czg;
Query OK, 0 rows affected (Elapsed: 00:00:00.06)

gbase> show tables;
+--------------------------+
| Tables_in_czg            |
+--------------------------+
| a                        |
| alldbvoidrate            |
| b                        |
| czg                      |
| czg_test                 |
| d_admin_kpi_code         |
| hash_tab                 |
| hash_tb_like             |
| jointable                |
| jointable1               |
| moon                     |
| moon_copy                |
| nodedatamap              |
| sg_t_loadconfig_incr     |
| sg_t_loadconfig_incr_odm |
| strtab                   |
| sun                      |
| sun_gbk                  |
| t1                       |
| t_policy_ext_info        |
| test                     |
| test20230302             |
| test_12_05               |
| test_2023                |
| test_20230720            |
| test_table               |
| test_table_1             |
| test_table_2             |
| test_table_3             |
| testtab                  |
| testtab_copy             |
| tmp                      |
+--------------------------+
32 rows in set (Elapsed: 00:00:00.00)

gbase> select * from test;
+------+
| a    |
+------+
|    1 |
+------+
1 row in set (Elapsed: 00:00:00.21)

gbase> select * from testhahaha;
ERROR 1146 (42S02): Table 'czg.testhahaha' doesn't exist

4、查看文件级别general log

[gbase@czg2 ~]$ tail -f /opt/gcluster/log/gcluster/gclusterd.log 
Time                 Id Command    Argument
230904  9:20:05    10 Connect   [email protected] on 
                   10 Query     set  gcluster_lock_timeout=0,gbase_fast_update=FALSE
                   10 Query     set general_log=1
                   10 Query     SET character_set_results = utf8mb4
                   10 Query     set  SELF global general_log=1
230904  9:20:27     9 Query     use czg
                   10 Init DB   czg
230904  9:20:43     9 Query     show tables
230904  9:20:51     9 Query     select * from test
230904  9:21:10     9 Query     select * from testhahaha

5、改为表级别general log

gbase> set global log_output = 'table';
Query OK, 0 rows affected (Elapsed: 00:00:00.00)

gbase> show variables like '%log_output%';
+---------------+-------+
| Variable_name | Value |
+---------------+-------+
| log_output    | TABLE |
+---------------+-------+
1 row in set (Elapsed: 00:00:00.00)

6、再次输入测试SQL

同3、输入测试SQL。

7、查看gbase.general_log

gbase> select * from gbase.general_log where event_time >= current_date();
+---------------------+--------------------------------+-----+-----------+-----------+--------------+--------------------------------------------------------------------+
| event_time          | user_host                      | uid | thread_id | server_id | command_type | argument                                                           |
+---------------------+--------------------------------+-----+-----------+-----------+--------------+--------------------------------------------------------------------+
| 2023-09-04 09:31:11 | root[root] @  [192.168.142.12] |   1 |        10 |         0 | Query        | set  SELF global general_log = 1                                   |
| 2023-09-04 09:31:27 | root[root] @ localhost []      |   1 |         9 |         0 | Query        | use czg                                                            |
| 2023-09-04 09:31:27 | root[root] @  [192.168.142.12] |   1 |        10 |         0 | Init DB      | czg                                                                |
| 2023-09-04 09:31:35 | root[root] @ localhost []      |   1 |        12 |         0 | Connect      | root@localhost on                                                  |
| 2023-09-04 09:31:45 | root[root] @ localhost []      |   1 |        12 |         0 | Query        | select * from gbase.general_log where event_time >= current_date() |
| 2023-09-04 09:32:01 | root[root] @ localhost []      |   1 |         9 |         0 | Query        | select * from test                                                 |
| 2023-09-04 09:32:04 | root[root] @ localhost []      |   1 |         9 |         0 | Query        | select * from testhahha                                            |
| 2023-09-04 09:32:10 | root[root] @ localhost []      |   1 |        12 |         0 | Query        | select * from gbase.general_log where event_time >= current_date() |
+---------------------+--------------------------------+-----+-----------+-----------+--------------+--------------------------------------------------------------------+
8 rows in set (Elapsed: 00:00:00.00)