ORA-00600: internal error code, arguments: [kglhdda-bad-free](原创)

故障报错如下

Thu Mar 15 09:51:29 GMT+08:00 2012Errors in file /oracle10g/app/oracle/admin/zgscdb/udump/zgscdb2_ora_39322018.trc:
ORA-00600: internal error code, arguments: [kglhdda-bad-free], [], [], [], [], [], [], []

该报错是由于Bug 8298501引起的，受影响的版本有10.2.0.4与10.2.0.5，至今不丁尚未发布，但可以采用设置如下跟踪事件的方式避免报错event="8298501 trace name context forever, level 1"。该报错主要是由于多个会话访问了同一个library cache中的对象，但由于对象没有更新自身的锁链表而导致访问冲突。metalink上的具体描述如下

Bug 8298501  ORA-600 [17070] / ORA-600 [kglhdda-bad-free] under heavy load

 This note gives a brief overview of bug 8298501.
 The content was last updated on: 17-SEP-2011
 Click here for details of each of the sections below.

Affects:

Product (Component )	Oracle Server (Rdbms)
Range of versions believed to be affected	Versions BELOW 11.1
Versions confirmed as being affected	10.2.0.5 10.2.0.4
Platforms affected	Generic (all / most platforms affected)

Fixed:

This issue is fixed in

(None Specified)

Symptoms:	Related To:
Internal Error May Occur (ORA-600) ORA-600 [17070] ORA-600 [kglhdda-bad-free]	(None Specified)

Description

ORA-600 [17070] (in 10.2.0.4 or earlier) or ORA-600 [kglhdda-bad-free] 
(in 10.2.0.5) can occur under heavy concurrency against the same 
library cache object.
 
Rediscovery Notes:
  This problem shows in systemstate dumps as multiple sessions 
  accessing the same library cache object with one process
  holding a library cache lock against the object but the
  session does not show up in the lock owners list.
 
Note: This fix is disabled by default as it introduces 
      an additional latch get. To enable the fix set
      event 8298501 to any non zero level.
      eg: event="8298501 trace name context forever, level 1"

参考至:https://support.oracle.com/CSP/ui/flash.html#tab=KBHome%28page=KBHome&id=%28%29%29,%28page=KBNavigator&id=%28bmDocTitle=Bug%208298501%20-%20ORA-600%20[17070]%20/%20ORA-600%20[kglhdda-bad-free]%20under%20heavy%20load&bmDocType=PATCH&bmDocID=8298501.8&viewingMode=1143&bmDocDsrc=KB&from=BOOKMARK%29%29

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