|
Problem IC79976
|
Status: Closed |
DB2 MAY TRAP WHEN UNFIXING THE LAST PAGE OF A TEMP TABLE DUE TO A TIMING HOLE ISSUE |
| product: |
DB2 FOR LUW / DB2FORLUW / 970 - DB2 |
| Problem description: |
When dropping a TEMP table, db2 will unfix pages from buffer
pool. There exist a timing hole issue when two unfixers try to
unfix the last page of a TEMP table without the page latch
protection which in turn causes db2 trap.
The issue can be identified from the stack trace.
<StackTrace>
sqlbufix
sqlbufix
sqldDropTable
sqldDropTable
sqldTableDrop
sqlrl_userTempDrop
sqlrl_userTempCleanup
sqlrr_appl_term
AppStopUsing
</StackTrace> |
| Problem Summary: |
****************************************************************
* USERS AFFECTED: *
* ALL *
****************************************************************
* PROBLEM DESCRIPTION: *
* When dropping a TEMP table, db2 will unfix pages from buffer *
* *
* pool. There exist a timing hole issue when two unfixers try *
* to *
* unfix the last page of a TEMP table without the page latch *
* *
* protection which in turn causes db2 trap. *
* *
* *
* *
* The issue can be identified from the stack trace. *
* *
* *
* *
* <StackTrace> *
* *
* sqlbufix *
* *
* sqlbufix *
* *
* sqldDropTable *
* *
* sqldDropTable *
* *
* sqldTableDrop *
* *
* sqlrl_userTempDrop *
* *
* sqlrl_userTempCleanup *
* *
* sqlrr_appl_term *
* *
* AppStopUsing *
* *
* </StackTrace> *
****************************************************************
* RECOMMENDATION: *
* Upgrade to DB2 v97fp6 *
**************************************************************** |
| Local Fix: |
|
| available fix packs: |
DB2 Version 9.7 Fix Pack 6 for Linux, UNIX, and Windows
DB2 Version 9.7 Fix Pack 7 for Linux, UNIX, and Windows
DB2 Version 9.7 Fix Pack 8 for Linux, UNIX, and Windows
DB2 Version 9.7 Fix Pack 9 for Linux, UNIX, and Windows
DB2 Version 9.7 Fix Pack 9a for Linux, UNIX, and Windows
DB2 Version 9.7 Fix Pack 10 for Linux, UNIX, and Windows
|
| Solution |
The fix will be included in DB2 v97fp6 |
| Workaround |
not known / see Local fix |
| Timestamps |
Date - problem reported :
Date - problem closed :
Date - last modified :
| 23.11.2011
06.06.2012
06.06.2012 |
| Problem solved at the following versions (IBM BugInfos) |
9.7.FP6
|
| Problem solved according to the fixlist(s) of the following version(s) |
| 9.7.0.6
|
 |
