|
Problem IC77056
|
Status: Closed |
OFFLINE ADD NODE AND NORMAL DB2START FAIL DUE TO DEADLATCH DURING INSTANCE STARTUP |
| product: |
DB2 FOR LUW / DB2FORLUW / 970 - DB2 |
| Problem description: |
During instance startup on a partition, a deadlatch may occur
while initiializing the DBMS memory set. In rare circumstances,
additional memory may need to be allocated while trying to set
up the memory set which leads to a deadlatch situation. This is
due to an internal accounting error when estimating the initial
size of a memory heap. If the deadlatch occurs then db2start
will timeout or hang.
A db2trc taken during db2start would look like this if the issue
occurs:
11541 0.986140292 DB2StartMain data [probe 375]
11542 0.986141042 | SqloMemController::initialize
entry
11543 0.986141941 | SqloMemController::initialize
exit
11544 0.986143324 | sqloRegisterMemorySetWithPMC
entry
11545 0.986145712 | |
SqloMemController::registerConsumer entry
11546 0.986147470 | | | sqlogmblkEx entry
11547 0.986150005 | | | |
SMemBasePool::getNewChunkSubgroup entry
11548 0.986153271 | | | | | sqlo_xlatch::getConflict
entry
11549 0.986206322 | | | | | sqlo_xlatch::getConflict
mbt [Marker:PD_LATCH_TRACE_WAIT_STARTING ]
13835 306.975846427 | | | | | | sqleKillNode entry |
| Problem Summary: |
****************************************************************
* USERS AFFECTED: *
* DPF *
****************************************************************
* PROBLEM DESCRIPTION: *
* See above. *
****************************************************************
* RECOMMENDATION: *
* Please upgrade to DB2 9.7 FP5 or later *
**************************************************************** |
| Local Fix: |
|
| available fix packs: |
DB2 Version 9.7 Fix Pack 5 for Linux, UNIX, and Windows
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 |
Deadlatch situation is resolved by properly estimating size of
internal memory heap. The problem is first fixed in DB2 9.7 FP5. |
| Workaround |
not known / see Local fix |
| Timestamps |
Date - problem reported :
Date - problem closed :
Date - last modified :
| 18.06.2011
16.12.2011
16.12.2011 |
| Problem solved at the following versions (IBM BugInfos) |
9.7.FP5
|
| Problem solved according to the fixlist(s) of the following version(s) |
| 9.7.0.5
|
 |
