Bug 590762
Summary: | Load average spikes for 15-30 sec making system unresponsive. | ||||||
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Product: | Red Hat Enterprise Linux 4 | Reporter: | Ben Turner <bturner> | ||||
Component: | autofs5 | Assignee: | Ian Kent <ikent> | ||||
Status: | CLOSED WONTFIX | QA Contact: | Filesystem QE <fs-qe> | ||||
Severity: | high | Docs Contact: | |||||
Priority: | high | ||||||
Version: | 4.8 | CC: | jmoyer, jwest, kzhang, rwheeler, tao | ||||
Target Milestone: | rc | ||||||
Target Release: | --- | ||||||
Hardware: | All | ||||||
OS: | Linux | ||||||
Whiteboard: | |||||||
Fixed In Version: | Doc Type: | Bug Fix | |||||
Doc Text: | Story Points: | --- | |||||
Clone Of: | Environment: | ||||||
Last Closed: | 2011-01-25 21:05:25 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: | |||||||
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Description
Ben Turner
2010-05-10 16:05:06 UTC
Turning this into a proper autofs5 bug. Maybe we can backport the negative cache fixes from RHEL-5 and ensure it performs better with a multitude of non-existing lookups. Created attachment 433201 [details] Failed attempt to backport some fixes from RHEL-5 This patch was an attempt to backport the RHEL-5 fixes found in these bugs: https://bugzilla.redhat.com/show_bug.cgi?id=469387 https://bugzilla.redhat.com/show_bug.cgi?id=593378 It seems the situation did not improve at all, though, so I'll have to defer to Ian for a more informed opinion. :) Event posted on 08-13-2010 11:49am EDT by bturner Any update in backporting the RHEL 5 patches to RHEL 4? The customer is getting antsy for something. Any idea when you will have a chance to get those changes backported? -Ben This event sent from IssueTracker by bturner issue 863873 (In reply to comment #15) > Event posted on 08-13-2010 11:49am EDT by bturner > > Any update in backporting the RHEL 5 patches to RHEL 4? The customer is > getting antsy for something. Any idea when you will have a chance to get > those changes backported? Right, I need to get back to this, I'll spend time on it tomorrow. But, mostly this isn't a backport, it's is a new change. (In reply to comment #16) > (In reply to comment #15) > > Event posted on 08-13-2010 11:49am EDT by bturner > > > > Any update in backporting the RHEL 5 patches to RHEL 4? The customer is > > getting antsy for something. Any idea when you will have a chance to get > > those changes backported? > > Right, I need to get back to this, I'll spend time on it > tomorrow. > > But, mostly this isn't a backport, it's is a new change. While I'm working on the change to catch negative cached lookups earlier it would be a good idea to try the current CVS package. This should fix non-existing keys not being added to the negative cache and report the negative lookup only when the key is first added. This won't help whatever is causing the high load average but it should quiet the log and fix the negative cache problem. This rpm can be found at: http://people.redhat.com/~ikent/autofs5-5.0.1-0.rc2.112 I've built a test package that checks if a lookup negatively cached very early in the lookup. Not sure how it will go and I haven't actually tested it but it should be OK. Please give it a try, it can be found at: http://people.redhat.com/~ikent/autofs5-5.0.1-0.rc2.112.bz590762.1 (In reply to comment #18) > I've built a test package that checks if a lookup > negatively cached very early in the lookup. > > Not sure how it will go and I haven't actually tested > it but it should be OK. > > Please give it a try, it can be found at: > http://people.redhat.com/~ikent/autofs5-5.0.1-0.rc2.112.bz590762.1 Oops, stupid mistake, please try: http://people.redhat.com/~ikent/autofs5-5.0.1-0.rc2.112.bz590762.2 A problem has been reported against the latest test package we are using for this bug. Having seen this problem before I have added a patch that may address the issue however we have not had sufficient feedback to know that the correction is sufficient. So please give it a try and let us know how it goes. The new package can be found at: http://people.redhat.com/~ikent/autofs5-5.0.1-0.rc2.112.bz590762.4 Development Management has reviewed and declined this request. You may appeal this decision by reopening this request. |