Oracle AWR报告指标全解析三
enq: TX – row lock/index contention、allocate ITL等待事件enq: TM – contention等待事件Oracle队列锁enq:TS,Temporary Segment (also Tabl...
enq: TX – row lock/index contention、allocate ITL等待事件enq: TM – contention等待事件Oracle队列锁enq:TS,Temporary Segment (also Tabl...
http://www.askmaclean.com/archives/awr-hawk-eyes-training.html http://www.askmaclean.com/archives/awr-tuning-hawk-eyes.h...
来自白大师(白鳝)对log file sync等待事件优化的总结,供各位puber们学习参考: 一、 log file sync平均等待事件时间超过7ms,如果等待时间过长,说明log write每次写入的时间过长,如果能够优化redo日...
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.查看ASM磁盘情况 SQL> select group_number,disk_number,mount_status,header_status,mode_status,state,failgroup,total_mb,free_...
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As the root user, install the device-mapper-multipath package using the yum package manager[root@vzwc1 ~]# cat /etc/redh...
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1. 概述 2. ASMFD启用后的情况 3. 如何关闭Oracle ASMFD 停止CRS 卸载ACFS 禁用ASMFD 清理Label deconfigure asmfd 启动CRS 4. 如何启用Oracle ASMFD 检查ASM ...
什么是 Oracle ASM Filter Driver (ASMFD)? 简单地说,这是一个可以取代 ASMLIB 和 udev 设置的新功能,并且还增加了 I/O Filter 功能,这也体现在该功能的命名中。ASMFD 目前只在 Li...
Oracle AWR 介绍(AWR — Automatic Workload Repository) http://blog.csdn.net/tianlesoftware/archive/2009/10/17/4682300....
5150122收藏编辑 Oracle 12C引入了CDB与PDB的新特性,在ORACLE 12C数据库引入的多租用户环境(Multitenant Environment)中,允许一个数据库容器(CDB)承载多个可插拔数据库(PDB)。CD...
thesame Database character set (NLS_CHARACTERSET) or the NLS_CHARACTERSET need to be a (Plug-in compatible) binary subse...
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问题背景描述: view plaincopy SQL> alter session set container=pdbwyzc; –切换pdb SQL> define username=eoda SQL> de...
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Automated maintenance tasks are tasks that are started automatically at regular intervals to perform maintenance operati...
分类: Oracle 前沿:随着数据库版本的提升,Oracle也提供了越来越多的性能诊断工具,针对SQL的调优,DBMS_SQLTUNE就是其中一个比较优秀的包。 DBMS_SQLTUNE最开始是在10G里面出现,11G里面则对其进行了加强...
下面介绍移动oracle数据文件的两种方法。# 该方法,可以移动任何表空间的数据文件。*关闭数据库*SQL> shutdown immediateDatabase closed.Database dismounted.ORACLE i...