Bug 130489
| Summary: | kernel kills db2 processes because of OOM error on RHEL Update2 and Update3 | ||||||||
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| Product: | Red Hat Enterprise Linux 3 | Reporter: | IBM Bug Proxy <bugproxy> | ||||||
| Component: | kernel | Assignee: | Larry Woodman <lwoodman> | ||||||
| Status: | CLOSED ERRATA | QA Contact: | Brian Brock <bbrock> | ||||||
| Severity: | medium | Docs Contact: | |||||||
| Priority: | medium | ||||||||
| Version: | 3.0 | CC: | anderson, peterm, petrides, riel, tburke | ||||||
| Target Milestone: | --- | ||||||||
| Target Release: | --- | ||||||||
| Hardware: | All | ||||||||
| OS: | Linux | ||||||||
| Whiteboard: | |||||||||
| Fixed In Version: | RHSA-2006-0144 | Doc Type: | Bug Fix | ||||||
| Doc Text: | Story Points: | --- | |||||||
| Clone Of: | Environment: | ||||||||
| Last Closed: | 2006-03-15 15:38:12 UTC | Type: | --- | ||||||
| Regression: | --- | Mount Type: | --- | ||||||
| Documentation: | --- | CRM: | |||||||
| Verified Versions: | Category: | --- | |||||||
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |||||||
| Cloudforms Team: | --- | Target Upstream Version: | |||||||
| Embargoed: | |||||||||
| Bug Depends On: | |||||||||
| Bug Blocks: | 168424 | ||||||||
| Attachments: |
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Comment 7
Larry Woodman
2004-08-23 01:43:59 UTC
----- Additional Comments From ysluk.com 2004-08-23 18:43 ------- The problem goes away after rebooting with "numa=off" Thanks! ----- Additional Comments From salina.com 2004-08-24 11:07 ------- Question for RedHat, Is numa=on by default on RHEL 3 U3 ? If this does not work, it will be better if this is off by default i.e. mayne until RHEL 4 where 2.6 kernel has more stable numa code ?? Thhanks. For RHEL3-U3 NUMA is ON by default and its too late to change it now. For RHEL3-U4 wa are investigating what changes would be necessary to allow it to remain ON by default and still work correctly under high memory load situations. Larry Woodman ----- Additional Comments From salina.com 2004-08-24 13:29 ------- Ananda, I have added you to cc list. Please see if you are hitting this on p-series with NUMA=on. Thanks. ----- Additional Comments From AVenkat.com 2004-08-24 13:32 ------- Thanks for letting me know. Will check and let you know. --Ananda I think this problem is restricted to Opteron. Larry ----- Additional Comments From salina.com 2004-08-24 13:25 ------- Based on response from Larry, I am going to put target milesstone in as RHEL 3 QU4. We will leave problem open until numa=on works. Thanks. *** This bug has been marked as a duplicate of 131295 *** ----- Additional Comments From AVenkat.com 2004-12-01 22:19 EDT ------- I haven't used numa feature so far on pSeries. Probably, I might not be using the large pages since the squadron boxes that I use have only 2GB (SF2) or 4GB (L4). However, I will try to borrow one box with a larger memory. It has been decided that x86_64 RHEL3 kernels should continue to enable
NUMA by default. However, if an OOM kill occurs on a NUMA system, an
extra message will be printed by the kernel suggesting that using the
"numa=off" boot option might be a good way to work around the issue.
The exact message is:
OOM kill occurred on an x86_64 NUMA system!
The numa=off boot option might help avoid this.
This change was committed to the RHEL3 U5 patch pool on 9-Feb-2005 (in
kernel version 2.4.21-27.12.EL).
A fix for this problem has just been committed to the RHEL3 U7 patch pool this evening (in kernel version 2.4.21-37.12.EL). To enable an improved NUMA-friendly page allocation policy, please set /proc/sys/vm/numa_memory_allocator via the "sysctl" command (or put "vm.numa_memory_allocator = 1" in /etc/sysctl.conf). An advisory has been issued which should help the problem described in this bug report. This report is therefore being closed with a resolution of ERRATA. For more information on the solution and/or where to find the updated files, please follow the link below. You may reopen this bug report if the solution does not work for you. http://rhn.redhat.com/errata/RHSA-2006-0144.html |