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转载 共享池的SUB POOL技术以及ORA-0301
http://www.oraclefans.cn/blog/showblog.jsp?rootid=38451
2012-03-04 14:08:10
642
转载 RAC之LMS的来世今生
http://www.eygle.com/archives/2008/06/oracle_lms_process.html
2012-02-29 21:46:03
498
原创 活学或用 index_stats
select what,height,lf_blks,br_blks,btree_space,opt_cmpr_count,opt_cmpr_pctsave from idx_stat;
2012-02-29 13:16:41
772
原创 惊人发现了一个移动表的超级方法 move table
move table 比 exp/imp 和 create table xxx as select * from x;1、Privileges and constraints to be kept2、The table strcture to be changed3、Movement to another tablespace4、The command to be parallel
2012-02-29 09:10:29
1785
原创 oracle read rewrite 功能概述
alter session set query_rewrite_enabled = true;alter session set query_rewrite_integrity = enforced;createcreate materialized view my_all_objects_aggsbuild immediaterefresh on commitenable
2012-02-21 21:28:21
763
原创 ORA-04031: unable to allocate 4096 bytes of shared memory
解决方案一、alter system flush shared_pool解决方案二、1、首先看shared_pool的两个参数设置SQL> show parameter shared_pool;NAME TYPE VALUE------------------------------------ --
2012-02-12 17:37:30
4811
原创 LOCK管理 v$session v$transaction v$lock
SQL> select sid,serial#,username from v$session; SID SERIAL# USERNAME---------- ---------- ------------------------------ 13 15682 DLSCDB 18 24454 DLSCDB
2012-02-11 20:54:26
3150
原创 Tuning the Operating System 之二
将SGA锁入内存,减少因为换页引发的性能瓶颈 SQL> show parameter lock_sga;NAME TYPE------------------------------------ --------------------------------VALUE-----------------------
2012-02-11 15:43:55
489
原创 Tuning the Operating System
NL-GLSJ01:~ # vmstatprocs -----------memory---------- ---swap-- -----io---- -system-- -----cpu------ r b swpd free buff cache si so bi bo in cs us sy id wa st 0 0 66796 3
2012-02-09 21:02:00
594
原创 python中的汉语乱码问题完美解决方案
脚本中添加如下,可以防止乱码[root@aaa-brm1 aaa]# more monitor_smap_50003.py #-*- coding: gb2312 -*- linux平台下设置环境变量,即可防止vi出现乱码export LC_ALL="zh_CN.GB2312"
2012-02-08 12:37:05
769
原创 oracle11g Real Time SQL Monitoring
两种方法监控SQL执行情况1、v$session_longops记录某个操作执行时间超过6秒2、v$SQL_MONITOR或者package DBMS_MONITOR来主动对SQL执行监控部署 该功能具备三个条件即可A) SQL> show parameter statistics_levelNAME
2012-01-28 23:41:59
518
原创 v$event_histogram柱状图分析
select event,wait_time_milli,wait_count from v$event_histogramwhere event = 'latch: shared pool'; SQL> /EVENT WAIT_TIME_MILLI WAIT_COUNT------------------------- --------
2012-01-28 23:06:33
1082
原创 SQL语句格式化时间字段
SQL> alter session set nls_date_format = 'yyyy-mm-dd hh24:mi:ss';Session altered.SQL> /Session altered.SQL> select sid,username,sql_exec_start,sql_exec_id from v$session where sql_exec_id is n
2012-01-28 21:17:08
2160
原创 等待事件之查询方法 v$system_wait_class
select * from v$system_wait_class order by time_waitedWAIT_CLASS_ID WAIT_CLASS# WAIT_CLASS TOTAL_WAITS TIME_WAITED TOTAL_WAITS_FG TIME_WAITED_
2012-01-28 20:59:34
2287
原创 linux 扩充SWAP空间
一、创建PV[root@rac1 ~]# pvcreate /dev/sda3 Physical volume "/dev/sda3" successfully created二、扩成VG[root@rac1 ~]# vgextend VolGroup00 /dev/sda3 /dev/hdc: open failed: Read-only file system /
2012-01-28 00:18:35
997
转载 dd命令
http://linux.chinaunix.net/doc/system/2005-02-03/1086.shtml dd if = /dev/zero of = /dev/raw/raw1 bs = 1024 count = 102400
2012-01-27 20:21:07
366
原创 linux也可以这样查看IP信息
[root@rac1 ~]# ip ad sh1: lo: mtu 16436 qdisc noqueue link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 inet 127.0.0.1/8 scope host lo inet6 ::1/128 scope host valid_lf
2012-01-27 18:39:31
633
原创 RAC维护工具集 oifcfg getif
root@SHYQ-PS-MV-SV03-CDMPDB1:/#oifcfg getif -globalen0 172.16.14.0 global publicen3 1.1.14.0 global cluster_interconnectroot@SHYQ-PS-MV-SV03-CDMPDB1:/# 这个命令在11g中似乎变样了root@SHYQ-PS-M
2012-01-27 18:21:10
1317
转载 修改Linux默认启动级别或模式
在Linux中有7种启动级别,默认是X-Window,像是Windows的窗口模式,而Linux的操作和配置一般我们都采用输入命令的方式来完成,像DOS操作系统一样,如何让Linux一启动就进入这种模式呢? 以管理员身份进入Linux,修改文件:/etc/inittab文件 找到“id:5:initdefault:”,其中的5就是X-Window,为默认运行级别,一般我们把5改
2012-01-26 16:40:53
335
转载 Oracle Database 11g Release 2 RAC On Linux Using VirtualBox
http://www.oracle-base.com/articles/11g/OracleDB11gR2RACInstallationOnOEL5UsingVirtualBox.php
2012-01-25 22:41:08
553
原创 Oracle Database 11g Release 2 RAC On Linux Using VMware Server 2
http://www.oracle-base.com/articles/11g/OracleDB11gR2RACInstallationOnOEL5UsingVMwareServer2.php
2012-01-25 22:40:17
441
转载 Using the Oracle ASM Cluster File System (Oracle ACFS) on Linux
http://www.rampant-books.com/t_hunter_using_oracle_acfs_on_linux_part1.htm
2012-01-25 17:48:37
400
原创 CentOS5.5使用yum和光盘安装软件
一、将光盘挂载到/media/cdrom目录下1、操作前的输出如下:[root@rac1 CentOS]# df -hFilesystem Size Used Avail Use% Mounted on/dev/sda2 3.8G 3.0G 655M 83% //dev/sda5 4.9G 1.
2012-01-25 16:59:23
2095
原创 ASMLIB下载链接
http://www.oracle.com/technetwork/server-storage/linux/downloads/rhel5-084877.html
2012-01-24 23:47:26
979
原创 Linux RedHat 修改主机名
临时修改只需要使用[root@yanyan ~]# hostname 新主机名查看主机名用[root@yanyan ~]# hostname如[root@yanyan ~]# hostname hui[root@yanyan ~]# hostnamehui 永久修改[root@yanyan ~]# vi /etc/sysconfig/network
2012-01-24 23:16:53
530
原创 VMware(VMware-server-installer-1.0.5-80187)模拟RAC使用的共享存储
在创建磁盘完毕后,修改VMWARE配置文件,添加如下两行数据,来修改磁盘属性disk.locking="FALSE"scsi1:1.shared = "TRUE"config.version = "8"virtualHW.version = "4"disk.locking="FALSE"scsi0.present = "TRUE"scsi0.virtua
2012-01-24 21:56:28
770
转载 11g新特性:X$DBGALERTEXT一个很酷的内部视图
http://www.oracledatabase12g.com/archives/11g%e6%96%b0%e7%89%b9%e6%80%a7xdbgalertext%e4%b8%80%e4%b8%aa%e5%be%88%e9%85%b7%e7%9a%84%e5%86%85%e9%83%a8%e8%a7%86%e5%9b%be.html
2012-01-08 13:19:33
450
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