Locks(细粒度)
很久没写东西了,分享下小小的东西...翻译有点累..概述:*.Oracle使用latches保护数据结构的间歇的,短持续的访问,但是latch不适合保护一些持续时间相对比较长的Resource db tables.在之中情况下,就要使用lock*....
internal of sga7
HEAP DUMP heap name="pga heap" desc=0xcbc28a0  ...
internal of sga6
Sessions: Struct ksusg &nb...
internal of sga5
Granules:39 &nb...
internal of sga4
三.Oracle内存结构详解三.一 Fixed SGA1.结构及说明: Granule in SGA |==================| | Fixed SGA |-->Fixed SGA  ...
internal of sga3
Area #0 `Fixed Size' containing Subareas 0-0 Total size 00000000001299c8 Minimum Subarea size 000...
internal of sga2
(一.五)Memory Areas(内存结构区域)1.PGA*.An Oracle process includes the following memory areas --一个Oracle进程包(Se...
internal of sga1
oradebug dumplistGlobal Area(在SGA中存放)=Fixed(SGA+GSGA,PGA+GPGA,UGA+GPGA)IPC=Shared Global AreaSGA+PGA:在SGA各个pool中的1granule=1extent,1extent=n chunks,在Freelist中单位是bucketsPGA可能类似&nbs...
Internal of Rac ha
Rac Cluster 包括常规的几个参数:(单位是s)其中有diagwait: --集群的对话时间 limitationreboottime: &...
Internal of Redo4
Example of Redo:CHANGE #3 TYP:0 CLS: 1 AFN:4 DBA:0x01000d44 OBJ:43810 SCN:0x0000.00299b74 SEQ: 1 OP:10.2index redo (kdxlin): insert leaf row  ...
Internal of Redo3
----------11(Row Operarion)---------------Opcode Mnemonic Description11.2 IRP Insert Single Row11.3 DRP &n...
Internal of Redo2
(四.六)Direct Load(直接加载)*.If archiving is enabled then direct load blocks are written to redo*.In Oracle 9.2 each block requires a 19.1 and 24.2 change*.直接加载比传统的insert 产生的redo少很多,如...
Internal of Redo1
其实很早就掌握了redo internal,Redo是oracle的灵魂,在此分享下:---------------------------------1.Index Insert 10.2+commit(5.4)2.Index update = 10.4 + 10.2 + commit(5.4)3.Index delete = 10.4 +commit(5....
Library cache Structure
...*.Relationshin between: KGLHD - Handle structure &nb...
Library cache
BUCKET 179: LIBRARY OBJECT HANDLE: handle=3124aee0 mutex=0x3124af94(0) name=select snap_interval, retention,most_recent_snap_time, most_recent_snap_id, status_flag, most_recent_purge_time,...
itpub装下东西?
最近想分享下东西,不过上传不了,看来不好搞了
buffer cache internal
最近研究buffer cache,希望能和大家交流进步Block header dump: 0x01000d3c Object id on Block? Y seg/obj: 0xae46 csc: 0x00.3dbe12 itc: 2 flg: E typ: 1 - DATA ...
日常chek结果
篇幅有限呀,汗- -其实知道算法的话可以写出甚至比awr,statspack更细致优秀的报表,如果可以的话可以将grid的细粒度报表也可以实现,这样对DBA的工作更灵活了.....................'********THISISBUFFERCACH...
日常监控一
最近一直在写脚本.分享下自己的几个脚本,互相交流学习 #/bin/bashLOC=/home/oracle/scriptsu - oracle -cecho "This is a database moniter!"source ~/.bash_profilesqlplus "/ as sysdba" << EOFspool '/...
Oracle 表对象HKW监控shell
背景:最近研究了下表HKW的性能影响,需要监某些性能问题的表,因此创建了该脚本#/bin/bash#echo "********Checking the Location's Existence!"#if [ -d /home/oracle/script/dbmon' ];# then echo "***...