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Problem IC84518
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Status: Closed |
MEMORY LEAK IN CATALOG CACHE WHEN AUTOMATIC STATISTICS IS ENABLED. |
| product: |
DB2 FOR LUW / DB2FORLUW / A10 - DB2 |
| Problem description: |
This memory leak only occurs with specific memory allocations
made by automatic statistics collection (which is enabled via
AUTO_RUNSTATS db cfg parameter).
To detect this memory leak, check for a steady catcache growth
from "db2pd -d <db> -memblocks sort 8" data from allocations by
file 1191117521 from line# 320-323. For example,
All memory consumers in Database memory set:
PoolID PoolName TotalSize(Bytes) %Bytes TotalCount
%Count LOC File
8 catcacheh 689981592 84.94 58066 5.58
320 1191117521
Several days later, it grows up:
PoolID PoolName TotalSize(Bytes) %Bytes TotalCount
%Count LOC File
8 catcacheh 759833640 91.59 63980 7.50
320 1191117521
This problem was first introduced in DB2 Version 9.7 Fixpack 1. |
| Problem Summary: |
****************************************************************
* USERS AFFECTED: *
* ALL *
****************************************************************
* PROBLEM DESCRIPTION: *
* See Error Description *
****************************************************************
* RECOMMENDATION: *
* Update to fixpack 1 or use the local fix. *
**************************************************************** |
| Local Fix: |
Disable AUTO_RUNSTATS, which is an online configurable db cfg
parameter. When disabled, you need to consider performing
statistics collection manually as needed, until automatic
statistics collection can be re-enabled. |
| available fix packs: |
DB2 Version 10.1 Fix Pack 1 for Linux, UNIX, and Windows
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
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| Solution |
This problem is first fixed in db2 version 10.1 fixpack 1. |
| Workaround |
not known / see Local fix |
| Timestamps |
Date - problem reported :
Date - problem closed :
Date - last modified :
| 14.06.2012
01.11.2012
01.11.2012 |
| Problem solved at the following versions (IBM BugInfos) |
|
| Problem solved according to the fixlist(s) of the following version(s) |
| 10.1.0.1
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 |
| 10.5.0.1
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