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Problem IC88608
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Status: Closed |
GROWING PACKAGE CACHE WITH INCREASED NUMBER OF STATEMENT ENTRIES ON STATEMENT CONCENTRATOR ENABLED DB. |
| product: |
DB2 FOR LUW / DB2FORLUW / A10 - DB2 |
| Problem description: |
Package cache may be growing with increased number of statement
entries and decreased numbers of variations if statement
concentrator is enabled on a database. Performance degradation
would be observed once package cache becomes full due to the
increased number of statement entries.
Users can identify if he/she is hitting this problem.
- Statement concentrator is enebled on the databaes. i.e.
STMT_CONC is set as LITERALS.
- The number of statement entries in the package cache after
running FLUSH PACKAGE CACHE keeps growing.
i.e. the following number keeps growing on the database.
db2 connect to <dbname>
db2 flush package cache dynamic
db2pd -db <dbname> -dyn | grep "^Number of Statements"
- Small number of variations in comparison with number of
statements remains in package cache.
This problem is caused by a timing hole on deleting statement
entries from package cache. |
| Problem Summary: |
****************************************************************
* USERS AFFECTED: *
* Users who use statement concentrator. *
****************************************************************
* PROBLEM DESCRIPTION: *
* See Error Description *
****************************************************************
* RECOMMENDATION: *
* Please upgrade to V10.1 FixPack 2 or later. *
**************************************************************** |
| Local Fix: |
Please set STMT_CONC as OFF. |
| available fix packs: |
DB2 Version 10.1 Fix Pack 2 for Linux, UNIX, and Windows
DB2 Version 10.1 Fix Pack 3 for Linux, UNIX, and Windows
DB2 Version 10.1 Fix Pack 4 for Linux, UNIX, and Windows
DB2 Version 10.1 Fix Pack 3a for Linux, UNIX, and Windows
DB2 Version 10.1 Fix Pack 6 for Linux, UNIX, and Windows
|
| Solution |
This problem was first fixed in DB2 V10.1 FixPack 2. |
| Workaround |
not known / see Local fix |
| Timestamps |
Date - problem reported :
Date - problem closed :
Date - last modified :
| 27.11.2012
31.12.2012
31.12.2012 |
| Problem solved at the following versions (IBM BugInfos) |
|
| Problem solved according to the fixlist(s) of the following version(s) |
| 10.1.0.2
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 |
| 10.5.0.2
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