Shared pool are contain lots of key memory areas of Oracle and in Instance tuning the major area that we have to tune is shared pool if shared pool defined improperly the overall database performance will suffer
从Oracle Database 11g开始,在Shared Pool中划出了另外一块内存用于存储SQL查询的结果集,称为ResultCache Memory。以前Shared Pool的主要功能是共享SQL,减少硬解析,从而?高性能,但是SQL共享之后,执行查询同样可能消耗大量的时间和资源,现在Oracle尝试将查询的结果集缓存起来,如果同一SQL或PL/SQL函数多次执行(特别是包含...
存储过程、包、函数等)以及它们转换后能够被Oracle执行的代码等,这部分信息可以通过v$librarycache视图查询;至于DataDictionary Cache主要用于存放数据字典信息,包括表、视图等对象的结构信息,用户以及对象权限信息,这部分信息相对稳定,在Shared Pool中通过字典缓存单独存放,字典缓存的内容是按行(Row)存储的(其他数据...
A Database Limits B SQL Scripts C Oracle Wait Events D Oracle Enqueue Names E Statistics Descriptions F Background Processes Index V$SHARED_POOL_LRU_EFFORTdisplays information about shared pool LRU scans. This view allows you to determine the amount of time spent scanning the shared pool LRU in...
Oracle 11.2 Updates Flush the Shared Pool To clear the whole shared pool you would issue the following command from a privileged user. ALTER SYSTEM FLUSH SHARED_POOL; It's a really brutal thing to do as all parsed SQL will be thrown away. The database will have to do a lot of work ...
Oracle wait event --- shared pool 技术标签:DatabaseOracle https://blog.csdn.net/lqx0405/article/details/44777319 Library cache包含了共享SQL区(shared SQL areas),私有SQL区(private SQLareas,如果配置了共享服务器),PL/SQL存储过程以及包,还有一些控制信息,比如说locks以及library cache handles。 Dictionary...
ORACLE instance started. Total System Global Area 47256168 bytes Fixed Size 451176 bytes Variable Size 29360128 bytes Database Buffers 16777216 bytes Redo Buffers 667648 bytes Database mounted. Database opened. SQL> create or replace PROCEDURE pining ...
SHARED_POOL_SIZE =integer[K | M | G] Default value IfSGA_TARGETis set: If the parameter is not specified, then the default is0(internally determined by the Oracle Database). If the parameter is specified, then the user-specified value indicates a minimum value for the memory pool. ...
Oracle Database - Enterprise Edition - Version 7.0.16.0 and later Information in this document applies to any platform. Purpose Introduction The aim of this article is to introduce the key issues involved in tuning the shared pool in Oracle 7 through 12c. The notes here are particularly importan...
故障排除:Shared Pool优化 (Doc ID 1523934.1) Troubleshooting: Understanding and Tuning the Shared Pool (Doc ID 62143.1) 适用于: Oracle Database Cloud Service - 版本 N/A 和更高版本 Oracle Database - Enterprise Edition - 版本 7.0.16.0 到 11.2.0.2 [发行版 7.0 到 11.2] Oracle Database - Stan...