通过shell脚本监控日志切换频率 (94天)

在数据库遇到性能问题的时候,可能从io,cpu等角度能够下手找到性能瓶颈,日志的切换也是影响性能的一个因素,如果日志切换台频繁,等待时间就会在日志相关的事件上,从数据库的角度来说,肯定是io的瓶颈。 可以通过如下的shell脚本来得到一个简单的报告。

---脚本如下:
sqlplus -s $DB_CONN_STR@$SH_DB_SID<<EOF

set linesize    150
set pages       100
set feedback    off
set verify      off


col dbname      new_value dbname
col time_stamp  new_value time_stamp
col timestamp_np        noprint
col year_np             noprint
col month_np            noprint
col mon                 for a3
col day                 for a2


ttitle off
SELECT name dbname, substr(to_char(sysdate,'YYYY-Mon-DD HH24:MI:SS'),1,20)
       time_stamp
FROM v\$database
/


col bytes format 9,999,999,999,999
col member format a60


select group#,thread#,sequence#,members,bytes/1024/1024 size_MB,archived,status
from v\$log order by 1,2;


ttitle left "Redo Switch times per hour" center "&dbname" right "&time_stamp" 
set term on
col tps00 for 999 head "00"
col tps01 for 999 head "01"
col tps02 for 999 head "02"
col tps03 for 999 head "03"
col tps04 for 999 head "04"
col tps05 for 999 head "05"
col tps06 for 999 head "06"
col tps07 for 999 head "07"
col tps08 for 999 head "08"
col tps09 for 999 head "09"
col tps10 for 999 head "10"
col tps11 for 999 head "11"
col tps12 for 999 head "12"
col tps13 for 999 head "13"
col tps14 for 999 head "14"
col tps15 for 999 head "15"
col tps16 for 999 head "16"
col tps17 for 999 head "17"
col tps18 for 999 head "18"
col tps19 for 999 head "19"
col tps20 for 999 head "20"
col tps21 for 999 head "21"
col tps22 for 999 head "22"
col tps23 for 999 head "23"


SELECT *
FROM
( SELECT substr(year_np,1,8)  timestamp_np,
       substr(year_np,5,2) Mon, substr(year_np,7,2) Day,
       sum(decode(substr(year_np,9,2),'00',cnt,0))   tps00,
       sum(decode(substr(year_np,9,2),'01',cnt,0))   tps01,
       sum(decode(substr(year_np,9,2),'02',cnt,0))   tps02,
       sum(decode(substr(year_np,9,2),'03',cnt,0))   tps03,
       sum(decode(substr(year_np,9,2),'04',cnt,0))   tps04,
       sum(decode(substr(year_np,9,2),'05',cnt,0))   tps05,
       sum(decode(substr(year_np,9,2),'06',cnt,0))   tps06,
       sum(decode(substr(year_np,9,2),'07',cnt,0))   tps07,
       sum(decode(substr(year_np,9,2),'08',cnt,0))   tps08,
       sum(decode(substr(year_np,9,2),'09',cnt,0))   tps09,
       sum(decode(substr(year_np,9,2),'10',cnt,0))   tps10,
       sum(decode(substr(year_np,9,2),'11',cnt,0))   tps11,
       sum(decode(substr(year_np,9,2),'12',cnt,0))   tps12,
       sum(decode(substr(year_np,9,2),'13',cnt,0))   tps13,
       sum(decode(substr(year_np,9,2),'14',cnt,0))   tps14,
       sum(decode(substr(year_np,9,2),'15',cnt,0))   tps15,
       sum(decode(substr(year_np,9,2),'16',cnt,0))   tps16,
       sum(decode(substr(year_np,9,2),'17',cnt,0))   tps17,
       sum(decode(substr(year_np,9,2),'18',cnt,0))   tps18,
       sum(decode(substr(year_np,9,2),'19',cnt,0))   tps19,
       sum(decode(substr(year_np,9,2),'20',cnt,0))   tps20,
       sum(decode(substr(year_np,9,3),'21',cnt,0))   tps21,
       sum(decode(substr(year_np,9,3),'22',cnt,0))   tps22,
       sum(decode(substr(year_np,9,2),'23',cnt,0))   tps23
  FROM (SELECT to_char(first_time,'YYYYMMDDHH24') year_np,count(*) cnt
        FROM v\$log_history where first_time>sysdate -15
        GROUP BY to_char(first_time,'YYYYMMDDHH24')
       )      
  GROUP BY substr(year_np,1,8), substr(year_np,5,2), substr(year_np,7,2)
)
ORDER BY timestamp_np
/
<<EOF
exit;

原文发布于微信公众号 - 杨建荣的学习笔记(jianrong-notes)

原文发表时间:2014-06-05

本文参与腾讯云自媒体分享计划,欢迎正在阅读的你也加入,一起分享。

发表于

我来说两句

0 条评论
登录 后参与评论

相关文章

来自专栏Golang语言社区

【Golang语言社区】GO1.9 map并发安全测试

var m sync.Map //全局 func maintest() { // 第一个 YongHuomap := make(map[st...

5408
来自专栏张善友的专栏

Mix 10 上的asp.net mvc 2的相关Session

Beyond File | New Company: From Cheesy Sample to Social Platform Scott Hansel...

2767
来自专栏我和未来有约会

Silverlight第三方控件专题

这里我收集整理了目前网上silverlight第三方控件的专题,若果有所遗漏请告知我一下。 名称 简介 截图 telerik 商 RadC...

4385
来自专栏闻道于事

js登录滑动验证,不滑动无法登陆

js的判断这里是根据滑块的位置进行判断,应该是用一个flag判断 <%@ page language="java" contentType="text/html...

8538
来自专栏张善友的专栏

Miguel de Icaza 细说 Mix 07大会上的Silverlight和DLR

Mono之父Miguel de Icaza 详细报道微软Mix 07大会上的Silverlight和DLR ,上面还谈到了Mono and Silverligh...

2997
来自专栏java 成神之路

使用 NIO 实现 echo 服务器

5547
来自专栏转载gongluck的CSDN博客

cocos2dx 打灰机

#include "GamePlane.h" #include "PlaneSprite.h" #include "BulletNode.h" #include...

7036
来自专栏一个爱瞎折腾的程序猿

sqlserver使用存储过程跟踪SQL

USE [master] GO /****** Object: StoredProcedure [dbo].[sp_perfworkload_trace_s...

2850
来自专栏陈仁松博客

ASP.NET Core 'Microsoft.Win32.Registry' 错误修复

今天在发布Asp.net Core应用到Azure的时候出现错误InvalidOperationException: Cannot find compilati...

5228
来自专栏一个会写诗的程序员的博客

Spring Reactor 项目核心库Reactor Core

Non-Blocking Reactive Streams Foundation for the JVM both implementing a Reactiv...

2752

扫码关注云+社区