log file switch (checkpoint incomplete) - 容易被误诊的event
DB Name DB Id Instance Inst num Startup Time Release RAC
R11204 2114874159 R11204 1 23-Oct-17 10:10 11.2.0.4.0 NO Host Name Platform CPUs Cores Sockets Memory (GB)
nascds18 Linux x86 64-bit 2 2 1 11.64 Snap Id Snap Time Sessions Cursors/Session
Begin Snap: 3 23-Oct-17 10:55:46 37 2.5
End Snap: 4 23-Oct-17 11:08:27 53 2.3
Elapsed: 12.67 (mins)
DB Time: 105.90 (mins)
Top 10 Foreground Events by Total Wait Time Event Waits Total Wait Time (sec) Wait Avg(ms) % DB time Wait Class
buffer busy waits 11 3310.6 300960 52.1 Concurrency
log file switch (checkpoint incomplete) 10 3034.8 303479 47.8 Configuration
DB CPU 5.5 .1
log file sync 28 2.3 82 .0 Commit
log buffer space 24 .8 32 .0 Configuration
2017-10-23 11:05:31.563 1 37 perl@nascds18 (TNS V1-V3) buffer busy waits WAITING 1 150
2017-10-23 11:05:31.563 1 150 sqlplus@nascds18 (TNS V1-V3) buffer busy waits WAITING 1 141
2017-10-23 11:05:31.563 1 141 OMS log file switch (checkpoint incomplete) WAITING 1 130
2017-10-23 11:05:31.563 1 130 oracle@nascds18 (LGWR) control file sequential read WAITING NO HOLDER
IOStat by Function summary Function Name Reads: Data
LGWR 1.5G
Others 210M
DBWR 0M
Buffer Cache Reads 10M
Direct Writes 0M
TOTAL: 1.7G IOStat by Filetype summary Filetype Name Reads: Data
Control File 1.5G
Log File 185M
Archive Log 0M
Data File 10M
Temp File 0M
TOTAL: 1.7G
Connected to:
Oracle Database 12c Enterprise Edition Release 12.1.0.2.0 - 64bit Production
With the Partitioning, OLAP, Advanced Analytics and Real Application Testing options SQL> select sid from v$mystat where rownum=1; SID
----------
11 <<<< session 1的 sid 为11 SQL> create table t as select * from dba_objects; Table created. SQL> update t set object_name=object_name; 93841 rows updated.
SQL> set line 200 pages 1000
SQL> select group#,thread#,status from v$log; GROUP# THREAD# STATUS
---------- ---------- ----------------
1 1 INACTIVE
2 1 INACTIVE
3 1 CURRENT SQL> alter system switch logfile; System altered. SQL> alter system switch logfile; System altered. SQL> select group#,thread#,status from v$log; GROUP# THREAD# STATUS
---------- ---------- ----------------
1 1 ACTIVE <<<<<< 让下一组是active的
2 1 ACTIVE
3 1 CURRENT
SQL> set line 200 pages 1000
SQL> select spid,program from v$process where program like '%DBW%' or program like '%LG%'; SPID PROGRAM
------------------------ ----------------------------------------------------------------
5768 ORACLE.EXE (DBW0)
7248 ORACLE.EXE (LGWR)
6384 ORACLE.EXE (LG00)
6308 ORACLE.EXE (LG01) SQL> oradebug setospid 5768
Oracle pid: 11, Windows thread id: 5768, image: ORACLE.EXE (DBW0)
SQL> oradebug suspend
Statement processed.
SQL> update t set object_name=object_name; 93841 rows updated. SQL> / 93841 rows updated. SQL> / 93841 rows updated. SQL> / ---- 在这里hang住了
SQL> set line 200 pages 1000
SQL> col program for a15
SQL> col event for a40
SQL> select sid,serial#,program,event,state from v$session where program like '%sqlplus%'; SID SERIAL# PROGRAM EVENT STATE
---------- ---------- --------------- ---------------------------------------- -------------------
10 33682 sqlplus.exe SQL*Net message from client WAITING
11 48189 sqlplus.exe log file switch (checkpoint incomplete) WAITING
129 25471 sqlplus.exe SQL*Net message to client WAITED SHORT TIME
130 64963 sqlplus.exe SQL*Net message from client WAITING
SQL> oradebug setospid 7248
Oracle pid: 12, Windows thread id: 7248, image: ORACLE.EXE (LGWR)
SQL> oradebug event 10046 trace name context forever, level 8
Statement processed.
SQL> oradebug tracefile_name
D:\ORACLE\diag\rdbms\r12102\r12102\trace\r12102_lgwr_7248.trc tail -f D:\ORACLE\diag\rdbms\r12102\r12102\trace\r12102_lgwr_7248.trc WAIT #0: nam='LGWR all worker groups' ela= 72 p1=0 p2=0 p3=0 obj#=-1 tim=25178622234
WAIT #0: nam='control file sequential read' ela= 407 file#=0 block#=1 blocks=1 obj#=-1 tim=25178622880
WAIT #0: nam='control file sequential read' ela= 262 file#=1 block#=1 blocks=1 obj#=-1 tim=25178623344
WAIT #0: nam='control file sequential read' ela= 717 file#=0 block#=15 blocks=1 obj#=-1 tim=25178624315
WAIT #0: nam='control file sequential read' ela= 1774 file#=0 block#=17 blocks=1 obj#=-1 tim=25178626427
WAIT #0: nam='control file sequential read' ela= 311 file#=0 block#=19 blocks=1 obj#=-1 tim=25178627527
WAIT #0: nam='control file sequential read' ela= 269 file#=0 block#=284 blocks=1 obj#=-1 tim=25178627983
WAIT #0: nam='control file sequential read' ela= 238 file#=0 block#=22 blocks=1 obj#=-1 tim=25178628363
WAIT #0: nam='LGWR all worker groups' ela= 51 p1=0 p2=0 p3=0 obj#=-1 tim=25178628590
WAIT #0: nam='control file sequential read' ela= 503 file#=0 block#=1 blocks=1 obj#=-1 tim=25178629320
WAIT #0: nam='control file sequential read' ela= 322 file#=1 block#=1 blocks=1 obj#=-1 tim=25178630389
WAIT #0: nam='control file sequential read' ela= 276 file#=0 block#=15 blocks=1 obj#=-1 tim=25178630864
WAIT #0: nam='control file sequential read' ela= 253 file#=0 block#=17 blocks=1 obj#=-1 tim=25178631286
WAIT #0: nam='control file sequential read' ela= 250 file#=0 block#=19 blocks=1 obj#=-1 tim=25178631696
WAIT #0: nam='control file sequential read' ela= 658 file#=0 block#=284 blocks=1 obj#=-1 tim=25178632935
WAIT #0: nam='control file sequential read' ela= 303 file#=0 block#=22 blocks=1 obj#=-1 tim=25178633812
......
SQL> oradebug resume
Statement processed.
log file switch (checkpoint incomplete) - 容易被误诊的event的更多相关文章
- log file switch (checkpoint incomplete)
接手了一个新交接的库,alert日志频繁报告log file switch (checkpoint incomplete)事件 oracle文档解释: Waiting for a log switch ...
- ORACLE等待事件: log file parallel write
log file parallel write概念介绍 log file parallel write 事件是LGWR进程专属的等待事件,发生在LGWR将日志缓冲区(log_buffer)中的重做日志 ...
- 理解LGWR,Log File Sync Waits以及Commit的性能问题[转]
理解LGWR,Log File Sync Waits以及Commit的性能问题 一.概要: 1. Commit和log filesync的工作机制 2. 为什么log file wait太久 3. ...
- Script to Collect Log File Sync Diagnostic Information (lfsdiag.sql) (文档 ID 1064487.1)
the article from :http://m.blog.itpub.net/31393455/viewspace-2130875/ Script to Collect Log File Syn ...
- log file sync等待超高案例浅析
监控工具DPA发现海外一台Oracle数据库服务器DB Commit Time指标告警,超过红色告警线(40毫秒左右,黄色告警是10毫秒,红色告警线是20毫秒),如下截图所示,生成了对应的时段的AWR ...
- Oracle 联机重做日志文件(ONLINE LOG FILE)
--========================================= -- Oracle 联机重做日志文件(ONLINE LOG FILE) --================== ...
- Linux/Unix shell 监控Oracle告警日志(monitor alter log file)
使用shell脚本实现对Oracle数据库的监控与管理将大大简化DBA的工作负担,如常见的对实例的监控,监听的监控,告警日志的监控,以及数据库的备份,AWR report的自动邮件等.本文给出Linu ...
- log file sync
Recently, our application system has updated one app. I receive a email of complain the db server ch ...
- 1025InnoDB log file 设置多大合适
转自 http://blog.csdn.net/langkeziju/article/details/51094289 数据库的东西,往往一个参数就牵涉N多知识点.所以简单的说一下.大家都知道inno ...
随机推荐
- 设计模式GOF23(行为型模式)
场景: – 公司里面,报销个单据需要经过流程: • 申请人填单申请,申请给经理 • 小于1000,经理审查. • 超过1000,交给总经理审批. • 总经理审批通过 – 公司里面,请假条的审批过程: ...
- [TimLinux] JavaScript 模态框可拖动功能实现——jQuery版
<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title> ...
- 显示cifar图片
# coding:utf-8 import numpy as np import matplotlib.pyplot as plt import pickle FILE_PATH = r"D ...
- 【简明翻译】Hibernate 5.4 Getting Started Guide 官方入门文档
前言 最近的精力主要集中在Hibernate上,在意识到Hibernate 5 的中文资料并不多的时候,我不得不把目光转向Hibernate的官方doc,学习之余简要翻一下入门文档. 原文地址:htt ...
- 如何用css画一个文件上传图案?
如下图,如果是你,你会怎么实现: 通常我们会通过字体图标来显示中间的加号,外层用一个div包裹即可:或者使用伪元素来模拟中间的一横一竖,这都比较麻烦. 其实我们可以直接使用div+css就可以实现. ...
- servlet读取请求参数后流失效的问题
在用reset接口的时候,常常会使用request.getInputStream()方法,但是流只能读取一次,一旦想要加上一个过滤器用来检测用户请求的数据时就会出现异常. 在过滤器中通过流读取出用户p ...
- JS基础-this
this this的指向有哪几种情况? this代表函数调用相关联的对象,通常页称之为执行上下文. 作为函数直接调用,非严格模式下,this指向window,严格模式下,this指向undefined ...
- Java并发编程系列-(6) Java线程池
6. 线程池 6.1 基本概念 在web开发中,服务器需要接受并处理请求,所以会为一个请求来分配一个线程来进行处理.如果每次请求都新创建一个线程的话实现起来非常简便,但是存在一个问题:如果并发的请求数 ...
- Applet和普通的Java应用程序有什么区别?
(1)运行方式不同.Java Applet程序不能单独运行,它必须依附于一个用HTML语言编写的网页并嵌入其中,通过与Java兼容的浏览器来控制执行.Java Application是完整的程序,可以 ...
- Runtime - 关联对象使用方法及注意点
大家都知道在分类里,可以间接的添加属性,运用runtime关联对象. 如下图,只是声明了btnClickedCount的set, get方法而已 并没有生成_btnClickedCount 成员变量, ...