绑定变量分级导致共享池占用过大

最新推荐文章于 2021-04-05 13:09:56 发布

转载最新推荐文章于 2021-04-05 13:09:56 发布 · 101 阅读

本文深入探讨了Oracle数据库的性能关键指标与优化策略，包括Banner信息、SQL共享游标匹配错误数量、内存使用情况等核心内容。通过具体SQL查询语句展示了如何评估和改善数据库性能，对于数据库管理员和开发者具有重要参考价值。

select * from v$version where rownum=1;
BANNER
--------------------------------------------------------------------------------
Oracle Database 11g Enterprise Edition Release 11.1.0.7.0 - 64bit Production

INSERT INTO BPM_PROCINST ( ID, GMT_MODIFIED, MODIFIER, IS_DELETED, VERSION, PROCDEF, STATE, PROCSTART_TIME, PROCEND_TIME, OLD_PROCINST, SUPER_PROCINST, SUPER_NODENAME, SAVE_SIGN, LINE_NOTE, REQUEST_PERSONID, REQUEST_PERSONNAME, REQUEST_ROLE, REQUEST_ORGID, REQUEST_ORGPATH, DOC_NO, SYSTEM_TYPE, DOC_TYPE, SUB_DOCTYPE, DOC_OBJTYPE, DOC_OBJID, CUST_MEMBER, CUST_ID, CUST_NAME, FLAG, COL1, COL2, COL3 ) VALUES ( :1, sysdate, :2, :3, :4, :5, :6, :7, :8, :9, :10, :11, :12, :13, :14, :15, :16, :17, :18, :19, :20, :21, :22, :23, :24, :25, :26, :27, :28, :29, :30, :31 )

select BIND_MISMATCH,count(*) from v$sql_shared_cursor where sql_id='576c1s91gua19' group by BIND_MISMATCH;

BIND_MISMATCH       COUNT(*)
-------------------- ----------
Y                         2635
N                            1
select sum(SHARABLE_MEM)/1024/1024 M from v$sql where sql_id='576c1s91gua19';

      M
----------
120.423182

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