客户报告,当他从 Oracle 11.1.0.7 ,迁移到云环境,并且升级到12.1.0.2.运行客户的应用程序测试,发现比以前更慢了. 从AWR report 的"Top 10 Foreground Events by Total Wait Time"和"Wait Classes by Total Wait Time"等信息,可以看到 CPU 值升高了. 初步思考,怀疑由于环境的不同,导致性能不同.但是客户说,这两个环境的CPU数目/内存大小等各方面情况都完全一样…
对两表结合查询建立MVIEW,进行MVIEW的的高速刷新失败,如何处理? 例如: SQL> drop user u1 cascade; User dropped. SQL> grant dba to u1 identified by u1; Grant succeeded. SQL> conn u1/u1Connected. SQL> create table TAB001 (col1 integer primary key, col2 integer, val3 integer)…
DGMGRL> disable configuration;ORA-16525: the Data Guard broker is not yet available Configuration details cannot be determined by DGMGRL cat drcposdb1.log 2013-08-29 17:26:08.181 01001000 1992740965 Operation CTL_ENABLE continuing with warning, statu…
How To Calculate The Required Network Bandwidth Transfer Of Redo In Data Guard Environments (Doc ID 736755.1) APPLIES TO: Oracle Database - Enterprise Edition - Version 9.0.1.0 and laterOracle Database Cloud Schema Service - Version N/A and laterOrac…