|
Problem IC75872
|
Status: Closed |
MONITOR HEAP LEAKING IN SIZE 16 AND 24 BYTES MAY OCCUR IF THERE ARE MANY TASKS RUN LIKE RESET MONITOR AND INSTANCE DETACH. |
| product: |
DB2 FOR LUW / DB2FORLUW / 910 - DB2 |
| Problem description: |
If there are many tasks like "db2 reset monitor all" and "db2
detach" run in the background, from the the db2pd -memblock
output, it could be perceived that db2 is leaking 16 and 24
bytes monitor memory at a stretch, like below:
Address PoolID PoolName BlockAge
Size(Bytes) I LOC File
0x0780000003694AC8 11 monh 7195 24
1 146 3254716357
0x0780000003694B08 11 monh 43116 16
1 146 3254716357
0x0780000003694B48 11 monh 43117 24
1 146 3254716357
0x078000000369D8C8 11 monh 63753 16
1 146 3254716357
0x078000000369D908 11 monh 63754 24
1 146 3254716357
0x078000000369DA28 11 monh 27486 16
1 146 3254716357
0x078000000369DA68 11 monh 27487 24
1 146 3254716357
0x078000000369DDA8 11 monh 19330 16
1 146 3254716357
0x078000000369DE68 11 monh 30457 16
1 146 3254716357
0x078000000369DF68 11 monh 55378 16
1 146 3254716357
...
Under such condition, the monitor memory heap will NOT be
released all the while and the error DIA8300C will be come up
with in the db2diag.log at the end as below:
2011-04-11-13.52.10.204659+480 I1287415A500 LEVEL: Severe
PID : 2150452 TID : 1 PROC :
db2agent
(instance) 0
INSTANCE: db2inst1 NODE : 000
APPHDL : 0-298 APPID:
*LOCAL.db2inst1.2007070720080708
AUTHID : hujinpei
FUNCTION: DB2 UDB, database monitor, sqm_object::new, probe:100
RETCODE : ZRC=0x8B0F000B=-1961951221=SQLO_NOMEM_MONH
"No memory available in 'Database Monitor Heap'"
DIA8300C A memory heap error has occurred. |
| Problem Summary: |
****************************************************************
* USERS AFFECTED: *
* ALL *
****************************************************************
* PROBLEM DESCRIPTION: *
* If there are many tasks like "db2 reset monitor all" and *
* "db2 *
* detach" run in the background, from the the db2pd -memblock *
* *
* output, it could be perceived that db2 is leaking 16 and 24 *
* *
* bytes monitor memory at a stretch, like below: *
* *
* *
* *
* Address PoolID PoolName BlockAge *
* Size(Bytes) I LOC File *
* *
* 0x0780000003694AC8 11 monh 7195 24 *
* 1 146 3254716357 *
* *
* 0x0780000003694B08 11 monh 43116 16 *
* *
* 1 146 3254716357 *
* *
* 0x0780000003694B48 11 monh 43117 24 *
* *
* 1 146 3254716357 *
* *
* 0x078000000369D8C8 11 monh 63753 16 *
* *
* 1 146 3254716357 *
* *
* 0x078000000369D908 11 monh 63754 24 *
* *
* 1 146 3254716357 *
* *
* 0x078000000369DA28 11 monh 27486 16 *
* *
* 1 146 3254716357 *
* *
* 0x078000000369DA68 11 monh 27487 24 *
* *
* 1 146 3254716357 *
* *
* 0x078000000369DDA8 11 monh 19330 16 *
* *
* 1 146 3254716357 *
* *
* 0x078000000369DE68 11 monh 30457 16 *
* *
* 1 146 3254716357 *
* *
* 0x078000000369DF68 11 monh 55378 16 *
* *
* 1 146 3254716357 *
* *
* ... *
* *
* *
* *
* Under such condition, the monitor memory heap will NOT be *
* *
* released all the while and the error DIA8300C will be come *
* up *
* with in the db2diag.log at the end as below: *
* *
* *
* *
* 2011-04-11-13.52.10.204659+480 I1287415A500 LEVEL: *
* Severe *
* *
* *
* PID : 2150452 TID : 1 PROC : *
* *
* db2agent *
* *
* (instance) 0 *
* *
* *
* *
* INSTANCE: db2inst1 NODE : 000 *
* *
* *
* *
* APPHDL : 0-298 APPID: *
* *
* *LOCAL.db2inst1.2007070720080708 *
* *
* AUTHID : hujinpei *
* *
* *
* *
* FUNCTION: DB2 UDB, database monitor, sqm_object::new, *
* probe:100 *
* *
* *
* RETCODE : ZRC=0x8B0F000B=-1961951221=SQLO_NOMEM_MONH *
* *
* *
* *
* "No memory available in 'Database Monitor Heap'" *
* *
* *
* *
* DIA8300C A memory heap error has occurred. *
****************************************************************
* RECOMMENDATION: *
* Upgrade to v9.1 FP11 *
**************************************************************** |
| Local Fix: |
The memory lack only happen when detaching the instance
attachment. Keep using the same instance attachment to do the
"reset monitor" and snapshot could avoid the memory leak. |
| available fix packs: |
DB2 Version 9.1 Fix Pack 11 for Linux, UNIX and Windows
DB2 Version 9.1 Fix Pack 12 for Linux, UNIX and Windows
|
| Solution |
After applied this fix the problem on memory leak of monitor
heap won't occurred again when detaching the instance
attachment. |
| Workaround |
not known / see Local fix |
| BUG-Tracking |
forerunner : APAR is sysrouted TO one or more of the following: IC75915 IC75916
follow-up : |
| Timestamps |
Date - problem reported :
Date - problem closed :
Date - last modified :
| 18.04.2011
10.12.2011
10.12.2011 |
| Problem solved at the following versions (IBM BugInfos) |
9.1.FP11
|
| Problem solved according to the fixlist(s) of the following version(s) |
| 9.1.0.11
|
 |
