|
Problem IC92599
|
Status: Closed |
PRIVATE MEMORY LEAK ON THE DB2 SERVER BY THE DB2PFCHR THREAD |
| product: |
DB2 FOR LUW / DB2FORLUW / A10 - DB2 |
| Problem description: |
db2sysc process will increase in memory consumption over time.
db2 private memory leak is observed within the db2pfchr thread.
db2pd -memset output will show the
committed size keep increasing over time for the private memory
set.
db2 select MEMORY_POOL_TYPE, MEMORY_POOL_ID, APPLICATION_HANDLE,
EDU_ID, MEMORY_POOL_USED, MEMORY_POOL_USED_HWM from
table"(mon_get_memory_pool('PRIVATE',null,null))"
will show the max private memory is consumed by the edu threads
corresponding to the db2prefchr threads.
e.g.
MEMORY_POOL_TYPE MEMORY_POOL_ID
APPLICATION_HANDLE EDU_ID MEMORY_POOL_USED
MEMORY_POOL_USED_HWM
-------------------------------- --------------------
-------------------- -------------------- --------------------
--------------------
PERSISTENT_PRIVATE 86
- 0 17956864 25427968
PRIVATE 88
- 7455 8454144 8519680
PRIVATE 88
- 7712 7864320 7864320
PRIVATE 88
- 7969 6881280 6881280
db2pd -memblocks pid=<db2sysc pid> will show the LOC as follows:
Memory blocks sorted by size:
PoolID PoolName TotalSize(Bytes) TotalCount LOC File
0 248320000 12125 1231
1480119721
The leak is due to incorrect memory deallocation by the
db2prefchr thread. |
| Problem Summary: |
****************************************************************
* USERS AFFECTED: *
* See Error Description *
****************************************************************
* PROBLEM DESCRIPTION: *
* See Error Description *
****************************************************************
* RECOMMENDATION: *
* Upgrade to DB2 Version 10.1 for Linux, UNIX, and Windows Fix *
* Pack 3 *
**************************************************************** |
| Local Fix: |
|
| available fix packs: |
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 |
Problem first fixed in DB2 Version 10.1 for Linux, UNIX, and
Windows Fix Pack 3 |
| Workaround |
not known / see Local fix |
| BUG-Tracking |
forerunner : APAR is sysrouted TO one or more of the following: IC95365
follow-up : |
| Timestamps |
Date - problem reported :
Date - problem closed :
Date - last modified :
| 24.05.2013
24.10.2013
24.10.2013 |
| Problem solved at the following versions (IBM BugInfos) |
|
| Problem solved according to the fixlist(s) of the following version(s) |
| 10.1.0.3
|
 |
| 10.1.0.3
|
|
