sql_monitor实时监控

Posted 2020-11-20 甩手掌柜文刀

1 检查数据库是否启用了监控功能

1）检查参数：CONTROL_MANAGEMENT_PACK_ACCES

SQL> show parameter CONTROL_MANAGEMENT_PACK_ACCESS;

NAME                                 TYPE        VALUE

------------------------------------ ----------- ------------------------------

control_management_pack_access       string      DIAGNOSTIC+TUNING

 

备注：参数值为“DIAGNOSTIC+TUNING”表示SQL 监控启用

 

2）检查参数：statistic

SQL> show parameter statistic

NAME                                 TYPE        VALUE

------------------------------------ ----------- ------------------------------

optimizer_use_pending_statistics     boolean     FALSE

statistics_level                     string      TYPICAL

timed_os_statistics                  integer     0

timed_statistics                     boolean     TRUE

备注：实时 SQL 监控需要 statistics_level 初始化参数设置为 TYPICAL 或 ALL

2 模拟一个大查询

表gl_je_lines中有120620495条数据，本地查询时间为12.31min

SQL> select count(1) from gl_je_lines gjh;

120620495

 

3 生成sql_monitor报告

注：主要由SQL的SQL_ID，就可以生成sql_monitor报表

1）获取SQL的SQL_ID

select sm.status,

       sm.username,

       sm.module,

       sm.program,

       (select fcp.user_concurrent_program_name

        from fnd_concurrent_programs_vl fcp

       where fcp.concurrent_program_name  =  sm.module) 请求名称,

       sm.physical_read_bytes / 1024 / 1024 read_io_mb,

       sm.io_interconnect_bytes / 1024 / 1024 read_io_inter_mb,

       sm.*,

       sm.sid,

       sm.client_identifier,

       sm.sql_id,

       sm.sql_text

  from v$sql_monitor sm

 where 1 = 1

   and sm.username = \'APPS\'

 --  and sm.module = \'PL/SQL Developer\'

 --  and sm.program = \'plsqldev.exe\'

 order by sm.physical_read_bytes desc;

得到SQL_ID：5rw111jmvv6xk

 

2）生成报告（模式：TEXT、html、XML、ACTIVE）

A 文本格式报告

select dbms_sqltune.report_sql_monitor(sql_id => \'&sqlid\', type => \'TEXT\') as report

  from dual;

注：输入前面查到的SQL_ID值，得到如下sql_monitor监控报告：

 

 

B HTML格式

select dbms_sqltune.report_sql_monitor(sql_id       => \'&sqlid\',

                                       report_level => \'ALL\',

                                       type         => \'HTML\') comm

  from dual;

注：输入前面查到的SQL_ID值，得到如下sql_monitor监控报告：