Date: Mon, 9 Feb 2015 22:39:47 +1300 From: Andrew Thompson <thompsa@FreeBSD.org> To: freebsd-xen@freebsd.org Subject: xenstore memory issue Message-ID: <CAFAOGNTCJsXr0VOUHAtFoPvQO5VWSUvL_VKkxYoaCtrZdC6zUg@mail.gmail.com>
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Hi,
I have three VMs with Rackspace and one is behaving oddly with xenstore
memory consumption. Here are the kernel versions and vmstat -m results.
FreeBSD us.e.com 10.0-RELEASE-p9 FreeBSD 10.0-RELEASE-p9 #0: Mon Sep 15
14:35:52 UTC 2014
root@amd64-builder.daemonology.net:/usr/obj/usr/src/sys/GENERIC
amd64
xenbus 16 2K - 86 16,32,64,256
xenstore 409 4837K - 38424052 16,32,64,128,256
xen_hvm 2 8K - 2 4096
xen_intr 25 4K - 25 128
FreeBSD uk.e.com 10.0-RELEASE-p12 FreeBSD 10.0-RELEASE-p12 #0: Tue Nov 4
05:07:17 UTC 2014
root@amd64-builder.daemonology.net:/usr/obj/usr/src/sys/GENERIC
amd64
xenbus 11 2K - 83 16,32,64,256
xenstore 198 2317K - 43428137 16,32,64,128,256,512
xen_hvm 2 8K - 2 4096
xen_intr 24 3K - 24 128
FreeBSD au.e.com 10.0-RELEASE-p12 FreeBSD 10.0-RELEASE-p12 #0: Tue Nov 4
05:07:17 UTC 2014
root@amd64-builder.daemonology.net:/usr/obj/usr/src/sys/GENERIC
amd64
xenbus 11 2K - 83 16,32,64,256
xenstore 8477 101653K - 55249 16,32,64,128,256,512
xen_hvm 2 8K - 2 4096
xen_intr 14 2K - 14 128
As you can see the third VM is using 100MB in xenstore memory and it seems
to be climbing by 1-2MB per hour. Eventually all the processes go in to
pfault state and it grinds to a halt.
How should I be debugging this? Is it either a local leak or the Xen host
is to blame?
cheers,
Andew
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