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Home » Microsoft » Windows Server » Active Directory » LSASS.EXE high CPU Utilization in Domain Controller
LSASS.EXE high CPU Utilization in Domain Controller [message #155865] Fri, 05 June 2009 17:29 Go to next message
Pierre  is currently offline Pierre
Messages: 3
Registered: June 2009
Junior Member
This process is utilizing close to 80-90% CPU utilzation - this just started
happening a couple weeks back -

can anyone point to any tools to troubleshoot this?
Re: LSASS.EXE high CPU Utilization in Domain Controller [message #155869 is a reply to message #155865] Sat, 06 June 2009 01:41 Go to previous messageGo to next message
alexdot kdot againang  is currently offline alexdot kdot againang  United States
Messages: 6
Registered: July 2009
Junior Member
More details might help - server version, domain changes (particularly
network config and user accounts) since the start of May, etc. There are
some general troubleshooting steps here:

http://blogs.msdn.com/spatdsg/archive/2007/01/30/what-s-bogg ing-down-your-cpu.aspx

You want to look under Scenario 2 on that page. The pull-the-plug approach
may be difficult to get away with in your domain, even though it will
quickly clue you in on whether the problem is external to the server.

The DS team actually has a detailed 2-part blog post on lsass cpu
utilization troubleshooting. See these pages:
http://blogs.technet.com/askds/archive/2007/08/20/troublesho oting-high-lsass-cpu-utilization-on-a-domain-controller-part -1-of-2.aspx
http://blogs.technet.com/askds/archive/2007/08/20/troublesho oting-high-lsass-cpu-utilization-on-a-domain-controller-part -2-of-2.aspx

They don't go into exhaustive debugging detail, but in your situation,
that's probably good. If the issue is a custom module of some kind, it's
_not_ the kind of problem that an admin can realistically diagnose; it needs
attention from the person who wrote the code.

In any case, your first step is definitely going to be determining whether
it's an internal or external problem. Even without a plug-pull, monitoring
lsass around the clock for a couple of days will be inordinately helpful. If
utilization stays high or has repetitive spikes even at ours when there are
few users, you can also do the plug pull then.

"Pierre" <Pierre@discussions.microsoft.com> wrote in message
news:60821F1B-6C60-4EDC-BFF0-DF4B164BBEF8@microsoft.com...
> This process is utilizing close to 80-90% CPU utilzation - this just
> started
> happening a couple weeks back -
>
> can anyone point to any tools to troubleshoot this?
Re: LSASS.EXE high CPU Utilization in Domain Controller [message #155974 is a reply to message #155869] Mon, 08 June 2009 14:59 Go to previous message
Pierre  is currently offline Pierre
Messages: 3
Registered: June 2009
Junior Member
Alex thanks I will defeintely try your suggestions.

will let you know.

"Alex K. Angelopoulos" wrote:

> More details might help - server version, domain changes (particularly
> network config and user accounts) since the start of May, etc. There are
> some general troubleshooting steps here:
>
> http://blogs.msdn.com/spatdsg/archive/2007/01/30/what-s-bogg ing-down-your-cpu.aspx
>
> You want to look under Scenario 2 on that page. The pull-the-plug approach
> may be difficult to get away with in your domain, even though it will
> quickly clue you in on whether the problem is external to the server.
>
> The DS team actually has a detailed 2-part blog post on lsass cpu
> utilization troubleshooting. See these pages:
> http://blogs.technet.com/askds/archive/2007/08/20/troublesho oting-high-lsass-cpu-utilization-on-a-domain-controller-part -1-of-2.aspx
> http://blogs.technet.com/askds/archive/2007/08/20/troublesho oting-high-lsass-cpu-utilization-on-a-domain-controller-part -2-of-2.aspx
>
> They don't go into exhaustive debugging detail, but in your situation,
> that's probably good. If the issue is a custom module of some kind, it's
> _not_ the kind of problem that an admin can realistically diagnose; it needs
> attention from the person who wrote the code.
>
> In any case, your first step is definitely going to be determining whether
> it's an internal or external problem. Even without a plug-pull, monitoring
> lsass around the clock for a couple of days will be inordinately helpful. If
> utilization stays high or has repetitive spikes even at ours when there are
> few users, you can also do the plug pull then.
>
> "Pierre" <Pierre@discussions.microsoft.com> wrote in message
> news:60821F1B-6C60-4EDC-BFF0-DF4B164BBEF8@microsoft.com...
> > This process is utilizing close to 80-90% CPU utilzation - this just
> > started
> > happening a couple weeks back -
> >
> > can anyone point to any tools to troubleshoot this?
>
>
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