KVM guests getting slow by time
Bug #1341195 reported by
Tamas Papp
This bug report is a duplicate of:
Bug #1346917: Using KSM on NUMA capable machines can cause KVM guest performance and stability issues.
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This bug affects 3 people
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
linux (Ubuntu) |
Incomplete
|
High
|
Unassigned |
Bug Description
There is a post with very similar symptoms on serverfault:
Basically all kind of KVM guests are getting slow by time, both windows or linux. The more running guests, it happens sooner.
Switching back to Saucy kernel is a good workaround.
ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: qemu-kvm 2.0.0+dfsg-
ProcVersionSign
Uname: Linux 3.13.0-29-generic x86_64
NonfreeKernelMo
ApportVersion: 2.14.1-0ubuntu3.2
Architecture: amd64
Date: Sat Jul 12 22:18:49 2014
SourcePackage: qemu
UpgradeStatus: No upgrade log present (probably fresh install)
tags: | added: ksm-numa-guest-perf |
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Since "switching to saucy kernel is a good workaround", marking this as affecting the kernel.
Could you try disabling KSM and see if that avoids the issue?