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Old 02-03-2011, 02:20 PM
mcclnx mcc
 
Default centos 5.5 check memoray usage too high???

Free is very good.


$ free
total used free shared buffers cached
Mem: 131961872 131342464 619408 0 1062984 119627256
-/+ buffers/cache: 10652224 121309648
Swap: 131074292 89220 130985072


--- 11/2/2 (三),Sean Hart <boardnutz@blacklight.net> 寫道:

> 寄件者: Sean Hart <boardnutz@blacklight.net>
> 主旨: Re: [CentOS] centos 5.5 check memoray usage too high???
> 收件者: centos@centos.org
> 日期: 2011年2月2日,三,下午4:59
>
>
> On 2/2/11 1:58 PM, mcclnx mcc wrote:
> > We have DELL R900 server with 128GB RAM (CENTOS 5.5)in
> it.* This server only have one application running and
> few people use it.
> >
> > Every week I ata least get one or two messages from
> monitor tool mail to me say:
> >
> > Message=Memory Utilization is 92.02%, crossed warning
> (80) or critical (90) threshold.
> >
> > Since server have 128 GB RAM and only 1
> application.* I really don't belive that.* Does
> there has some way can check memory utilitation ?
> >
>
> What is the output of the command "free"?
>
> ~Sean
> _______________________________________________
> CentOS mailing list
> CentOS@centos.org
> http://lists.centos.org/mailman/listinfo/centos
>



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Old 02-03-2011, 03:21 PM
Kai Schaetzl
 
Default centos 5.5 check memoray usage too high???

Mcclnx mcc wrote on Thu, 3 Feb 2011 23:20:10 +0800 (CST):

> Free is very good.

and what does your monitoring tool show now? Nearly 100%?

Kai


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Old 02-03-2011, 09:09 PM
John Hinton
 
Default centos 5.5 check memoray usage too high???

On 2/3/2011 7:36 AM, Always Learning wrote:
> On Thu, 2011-02-03 at 20:18 +0800, mcclnx mcc wrote:
>
>> kernel is:
>>
>> 2.6.18-194.26.1.el5 #1 SMP Tue Nov 9 12:54:20 EST 2010 x86_64 x86_64 x86_64 GNU/Linux
> I'm on Centos 5.5 and the kernel on my desktop machine is
>
> 2.6.18-194.32.1.el5 #1 SMP Wed Jan 5 17:52:25 EST 2011 x86_64 x86_64
> x86_64 GNU/Linux
>
If your swap drive is empty, as yours is, there is no shortage of ram.
If your ram is full, as yours is, simply think of this as an automatic
ram drive created and maintained by the system. You should be worried if
ram is not full, unless your ram is greater than the total of everything
accessed in the recent past.

Basically, seeing your report is verification of 'perfection' with
regards to efficiency (although I suppose the algorithm for what is
stored could be argued until the end of days). Use of ram is fast...
swap slow. Think windows rolling off to swap for a moment.

John Hinton

--
John Hinton
877-777-1407 ext 502
http://www.ew3d.com
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Old 02-03-2011, 09:55 PM
Kwan Lowe
 
Default centos 5.5 check memoray usage too high???

On Thu, Feb 3, 2011 at 7:18 AM, mcclnx mcc <mcclnx@yahoo.com.tw> wrote:
> kernel is:
>
> 2.6.18-194.26.1.el5 #1 SMP Tue Nov 9 12:54:20 EST 2010 x86_64 x86_64 x86_64 GNU/Linux
>

What sort of application? Is it 64-bit aware? What is the monitor checking?

Also, there are some things to keep in mind if it's a Java-based
application. You have to set heapsize differently (or at least, used
to have to) on 32-bit vs 64-bit Java.
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