Oracle 11g Active DataGuard(ADG) 优化及 duplicate hang 诊断案例

该环境是主备两套11.2.0.3 2-NODES RAC ON EXADATA Machine ,存储在ASM, 数据库70TB 大小, 闲时每天1T归档日志, 忙时每天可达4T+归档, 之前朋友重建DG一直使用主机上一个shell 放后台,我查看了该shell 确实不算复杂,但是duplicate 一直hang在开始

Run Node reboot when install10205 CRS PATCH & OUI-10021 & Oracle CRS stack is already configured 2nodes Oracle RAC ON HPUX 平台的环境, 计划升级到10.2.0.5, 前期升级clusterware 软件非常顺序,可是在跑root102.sh时还没跑完主机突然reboot, 尝试启crs 报错:The clusterware daemons are running from . But you are patching /oracle/product/10.2.0/crs10g

ORA-20011 ORA-12801 ORA-01722 when gather table statistics

在做一个普通的分区表(HEAP TABLE)收集统计信息时进程报错意外终止,后台日志未出现ora-600等内部错误,这是一套11. oracle RAC 2-nodes on HPUX-ia 11.31的运行环境,这里简单的记录一下排查过程。

SQL> exec DBMS_STATS.GATHER_TABLE_STATS (ownname => ‘ANBOB’ , tabname => ‘TAB_ERROR’ , cascade => true, estimate_percent => dbms_stats.auto_sample_size,method_opt=>’FOR TABLE FOR ALL COLUMNS SIZE REPEAT’, degree => 8,no_invalidate=>false);

ERROR at line 1:
ORA-20011: Approximate NDV failed: ORA-12801: error signaled in parallel query server P001, instance qdim1:im1 (1)
ORA-01722: invalid number

ora-7445 [LpxFSMSaxSE()+449] [SIGSEGV] when query with xmltype

ORA-07445: exception encountered: core dump [LpxFSMSaxSE()+449] [SIGSEGV] [ADDR:0xFD26CFB5] [PC:0x400000001117F881] [Address not mapped to object] []
—– Current SQL Statement for this session (sql_id=6qt1f1pg1dkzs) —–
SELECT UPPER(XMLType(CHR(60) || CHR(58) || CHR(113) || CHR(120) ||