Memory use

[[iso-8859-1] José Angel Blanco González]

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I dont understand anything at all.
I executed netx commands , all measures seem normal:
- 'sar'
            CPU        %user        %nice        %system        %idle
Media:    all            10.67        2.31            6.18 
80.44

- 'sar -b'
                tps        rtps        wtps        bread/s        bwrtn/s
Media:    11.88    2.65        9.23        104.61        351.76

- 'hdparm -tT /dev/hda'
Timing buffer-cache reads: 128MB in 0.31 seconds=412.90 MB/sec
Timing buffered disk reads: 64 MB in 11.68 seconds=5.48 MB/s

- free -m
                        total        used        free        shared 
buffers        cached
Mem:                2774       2748    25                    0 
110        2074
-+ buffers/caceh:              563        2210
Swap:                1019        4        1015

Maybe slow performance produced by slow disk reading??

Jose
----- Original Message ----- 
From: "Glenn Steen" <glenn.steen at GMAIL.COM>
To: <MAILSCANNER at JISCMAIL.AC.UK>
Sent: Thursday, November 17, 2005 12:57 AM
Subject: Re: Memory use


> On 16/11/05, José Angel Blanco González <jose at treelogic.com> wrote:
>> In vmstat, si is always 0, so it is not using swap I suppose. The 
>> computer
>> is a mail server with 500 mail accounts, maybe ipopd  or imapd the bug??
>>
> How did you determine that MailScanner dropped in performance? Exactly
> what characteristic are you seeing a problem with?
>
> You'll have to run the vmstat for a bit to be sure there really is no
> swapping, and perhaps look into the sar command (think it's part of
> the sysstat rpm or something similar.... I ditched my last RH9 the day
> after the desupport notice.... (a while back:-), so my recollections
> of exact package details is faint, to say the least...)
> sar will help you (together with top) to determine if you have unusual
> CPU load, which might be an indicator.... For IO, find and use iostat
> in a similar way as you use vmstat.
>
> Until you have some facts, it's way to soon to start assigning blame
> to individual systems/processes:-).
>
> --
> -- Glenn
> email: glenn < dot > steen < at > gmail < dot > com
> work: glenn < dot > steen < at > ap1 < dot > se
>
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