[TriLUG] Memory Monitor on a Redhat system
Len.Boyle at sas.com
Thu Mar 29 14:22:07 EDT 2007
How much swap space do you have defined on disk?
On Solaris the os reserve space in main memory for possible swap usage if there is none available on disk. I do not know if Red Hat does the same thing, but it is something that you might look at.
From: trilug-bounces at trilug.org [mailto:trilug-bounces at trilug.org] On Behalf Of Robert Dale
Sent: Thursday, March 29, 2007 2:18 PM
To: Triangle Linux Users Group discussion list
Subject: Re: [TriLUG] Memory Monitor on a Redhat system
On 3/29/07, Tom Le <t.thanhcle at gmail.com> wrote:
> We are having problems with memory usage on a Redhat AS 4 - on a
> 64-bit Power PC IBM pSeries. We was wondering if there is a reliable
> package to monitor memory usage on the server. Our current problem is
> that the system memory is 95% capacity and we have no idea what is
> taking up all the memory. We are certain that oracle is using 1G out
> of 16G of the box, and one instance of jboss is set to use max 1G of
> memory. We are trying to add a second instance of jboss and it won't
> start due to insufficient memory. We need a package or a way to drill
> down to what application using how much memory on the server Any
> suggestion is appreciated.
When you say at 95% capacity is that including buffers and cache?
What's your actual memory usage? (/proc/meminfo would be useful here) MemTotal - MemFree - Buffers - Cached = actual used memory
What's the actual jboss error message? Do you have the jvm stacktrace?
What jvm are you using? What jvm options are you starting jboss with?
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