After remote_listener change to null, frequently getting message ‘* service_update * ‘ in listener.log, pmon spin

一套10.2.0.5 RAC ON HPUX, 前做时间Disable LB 参数调整时把remote_listener=”, 随后几天发现listener.log 空间增速异常的快,当时看了下里面多是service_update的信息, 查看top进程,也发现了pmon 进程一直是top 1,使用 cpu 100%,

2014年终总结

–写在2015年初的一个夜晚 又到了写年终总结的岁末,2014年已匆匆结束,不知道大伙过年红包抢了多少?回顾这 […]

Troubleshooting ora-600 [17114] Trace file show current SQL selecting v$session

二个月前一套CRM 的10.2.0.5 rac on hpux 的alert 中发现了ora-600 17114 , 从trace file 中发现是查询v$session, 随后在MOS中找到了bug 导致, call stack 一致,简单记录一下。

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How to force a hint without touch sql text? 手动SQL Profile固定执行计划

很久以前遇到的一个问题简单记录一下,之前一个数据库出现了很高的I/O 负载,影响了全省的业务, 因为SQL 使用了错误的执行计划,当前修改app 重上线已来不及, 此时可以使用像sql profile,outline, sql baseline来指定个执行计划…

troubleshooting ORA-600[6302] & ORA-600 [6200] corrupted index block

今天同事的一套数据库遇到了alert 日志 一堆的ora-600,这是一套10.2.0.5 db 2nodes RAC on AIX , 找我帮着看看, 最终确认为一个索引出现了block corrupted 勘误块导致, 重新创建的了索引后解决…

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Performance tuning library cache lock & single-task message

My colleague suddenly encountered a problem today,a Database becomes very slow , and the a lot of session wait library cache lock event, Let me help him to look. DB env is 10.2.0.4 rac.

ORA-08104 when online index rebuild

Last night ,The Developers ask me they have creating an index do not use parallel,Unacceptably slow. then kill the session to cancel, but now to face ORA-08104 during trying to online index rebuild . that is a busy product database(7×24). DB version 10205 2nodes rac on hpux.

Troubleshooting ORA-07445 [skgxpdmpmem()+22096]

ORA-07445: exception encountered: core dump [skgxpdmpmem()+22096] [SIGSEGV] [Address not mapped to object] [0x0002D0B8C] [] []
Sun Dec 21 20:55:43 EAT 2014
Trace dumping is performing id=[cdmp_20141221205543]
Sun Dec 21 20:55:45 EAT 2014
Errors in file /opt/oracle/app/admin/anbob/bdump/anbob1_pmon_13442.trc:
ORA-00484: LMS* process terminated with error

Troubleshooting ORA-00600 internal error [6704], [2], [1405099], [953234]

刚接手一套数据库,数据库执行SQL时提示 ORA-00600: internal error code, arguments: [6704], [2], [1405099], [953234], [], [], [], [], [], [], [], []],下面简单记录一下。

Shell: extract more from listener.log(分析监听日志)

最近遇到了两起数据库连接数不足的问题, 通常都会预留一些会话增加的情况, 但在一些特殊情况下如连接风暴(logon storm), 如果在监听中没有做rate限流,对数据库来说
巨大的冲击可能会导致数据库Hang 或 ora-20 或ora-18 错误。

hpux psu 10.2.0.4.12 遇到的一些小问题

XX电信就是一个急性子,上午决定升级晚上就要实施,下面记录一下HPUX IA64 10.2.0.4.0 PSU […]

Unable execute “@”(at) sql file in sqlplus on hp-ux issue

I have a ORACLE db server on hp-ux,  i want to execute […]

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Troubleshooting ORA-31693 ORA-31617 ORA-19505 ORA-27037 when expdp with parallel on RAC 11G

ORA-31617: unable to open dump file “/dsg/datapump/ocs02.dmp” for write
ORA-19505: failed to identify file “/dsg/datapump/ocs02.dmp”
ORA-27037: unable to obtain file status
IBM AIX RISC System/6000 Error: 2: No such file or directory

Troubleshooting ora-600 [18194] and ora-600 [1265] error

Errors in file /opt/oracle/app/admin/anbob/udump/anbob1_ora_10082.trc:
ORA-00600: 内部错误代码, 参数: [opiodr: call 2], [], [], [], [], [], [], []
ORA-00600: 内部错误代码, 参数: [18194], [0xC0000002EE1E77E8], [0x000000000], [], [], [], [], []
ORA-00600: 内部错误代码, 参数: [1265], [0xC0000002FF7EF3D8], [], [], [], [], [], []

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Tuning “DFS lock handle” wait event

a few days ago,My CRM DB face to a performance issue. DB is very slow. then I check DB wait event of active session ,Most sessions is waiting “DFS lock handel” , ‘DFS lock handle’ can cause massive performance issues in a busy RAC cluster. my db is 10R2 2NODE RAC ON AIX.

Troubleshooting Instance crash when modify db_cache_size, ora-600 [kmgs_pre_process_request_6]

昨天一套开发库在开发人员修改了db_cache_size后instance crash了, 10.2.0.1 single instance on RHEL linux,是因为触发了一个bug, ORA-00600: internal error code, arguments: [kmgs_pre_process_request_6], [6], [895], [0], [3], [0x459C1F3D8]

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Troubleshooting One RAC node reboot with ora-600 [kjdrisRMnovalid:msgRMno]

今天一套 2节点的11.2.0.3 RAC 数据库计划在0点的维护窗口做一些参数优化,其中包括禁用DRM ,所以在下午提前修改了参数scope=spfile等晚上重启时生效,计划赶不上变化,就在大伙等待0点到来时,突然节点2主机重启,随后节点1跟随instance reboot(主机未重启),在Node1 DB alert.log 发现了ora-600 [kjdrisRMnovalid:msgRMno].

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Troubleshooting ora-07445 [smboCkaGetPivot]

Mon Dec 22 09:43:39 EAT 2014
Errors in file /opt/oracle/app/admin/anbob/udump/anbob1_ora_8183.trc:
ORA-07445: exception encountered: core dump [smboCkaGetPivot()+240] [SIGSEGV] [Invalid permissions for mapped object] [0x000000110] [] []

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ASM DISKGROUP Migrate to Anotherr SAN (迁移ASM到新存储)

上周刚刚做了ASM Storage的一套13T 2 Nodes 11GR2 database RAC ON A […]

Troubleshooting RAC intrance crash caused by private network IP address conflict (IP冲突)

今天有套rac 的一个节点主机重启,CRS没有启动, 10.2.0.5 2nodes rac on aix. 手动启动CRS依旧没有拽起来,下面整理一下错误过程… DUPLICATE IP ADDRESS DETECTED IN THE NET

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