Memory Usage {Scanned}

[Karl Bailey]

Why do none of my other Linux boxes behave in this manner then such as DNS servers Web servers running very memory intensive processing via jboss ... All of these show spikes of usage up to 100% but none are constant 90% & above usage of physical memory.. As I say this is not a problem & the whole system is rock solid... Just very curious.

Regrds
Karl 

-----Original Message-----
From: MailScanner mailing list [mailto:MAILSCANNER at JISCMAIL.AC.UK] On Behalf Of Mike Kercher
Sent: 01 April 2004 06:58
To: MAILSCANNER at JISCMAIL.AC.UK
Subject: Re: Memory Usage {Scanned}

My understanding is that this is normal behavior.  The kernel releases memory as it is needed.  Output of free on 2 of my machines:

$ free
             total       used       free     shared    buffers     cached
Mem:       1548284    1457620      90664          0     131196     782980
-/+ buffers/cache:     543444    1004840
Swap:      1044216      47660     996556

# free
             total       used       free     shared    buffers     cached
Mem:       1022796     944676      78120          0     188224     341936
-/+ buffers/cache:     414516     608280
Swap:      2048276     170856    1877420

Mike


> -----Original Message-----
> From: MailScanner mailing list
> [mailto:MAILSCANNER at JISCMAIL.AC.UK] On Behalf Of Karl Bailey
> Sent: Wednesday, March 31, 2004 11:34 PM
> To: MAILSCANNER at JISCMAIL.AC.UK
> Subject: Re: Memory Usage {Scanned}
> 
> I've run MailScanner with sendmail for over a year, hasn't gone wrong 
> once, I always upgrade to latest version. Mail gets past through spam 
> assassin & three virus scanners, it started life on a 2Ghz dual xeon 
> machine with 1 Gbyte ram running RH7.3, it now lives on a 3Ghz dual 
> xeon with 2Gbytes ram under RH9.0. I also manage a remote mailscanner 
> in a small office RH8.0 single 1100Mhz PIII with 512MBytes ram..
> Same results! The machines are dedicated & no gui is running, it's a 
> very trimmed down install.
> 
> My memory usage is through the roof all the time, never drops below 
> 90% of physical memory used, this was first seen using snmp, I got 
> interested & ran mailscanner-mrtg both show the same thing.. Memory 
> usage through the roof. I can attach the mem graph if you wish.. But 
> my point is... There seems to be no problem with this machines are 
> solid, but I am interested in why the memory usage is so high, I 
> figured I'd claw some of the memory back when upgrading the machine to 
> 2Gbyte of ram but it seems as much of the memory is grabbed as 
> possible by MailScanner.
> 
> Regards
> Karl Bailey
> Systems Administrator
> 
> -----Original Message-----
> From: MailScanner mailing list
> [mailto:MAILSCANNER at JISCMAIL.AC.UK] On Behalf Of David Shaw
> Sent: 01 April 2004 00:00
> To: MAILSCANNER at JISCMAIL.AC.UK
> Subject: Re: Memory Usage {Scanned}
> 
> I thought the same thing, but Ricks comment are correct.
> 
> Here is my output. Look at the 2nd line under free. I have
> 781256 free.
> 12-9-14-103 rules]# free
>              total       used       free     shared    
> buffers     cached
> Mem:       1030908     977196      53712          0     
> 215396     512148
> -/+ buffers/cache:     249652     781256
> Swap:      2040244      23628    2016616
> 
> 
> David
> --
> Open WebMail Project (http://openwebmail.org)
> 
> 
> ---------- Original Message -----------
> From: Kai Schaetzl <maillists at CONACTIVE.COM>
> To: MAILSCANNER at JISCMAIL.AC.UK
> Sent: Thu, 1 Apr 2004 00:36:59 +0200
> Subject: Re: Memory Usage {Scanned}
> 
> > Rob Burtelow wrote on         Wed, 31 Mar 2004 10:58:02 -0600:
> > 
> > > I'm running MailScanner on a RedHat ES 3 box and having problems 
> > > with really high memory usage, almost to the point of running out.
> > >
> > 
> > Apart from Ricks comment, even if you *had* a memory
> problem there's
> > nothing in your posted data which would indicate that Mailscanner 
> > causes the problem.
> > 
> > Kai
> > 
> > --
> > 
> > Kai Schätzl, Berlin, Germany
> > Get your web at Conactive Internet Services: 
> http://www.conactive.com
> > IE-Center: http://ie5.de & http://msie.winware.org
> > 
> > --
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> > Please contact support at computer-medic.us if you have
> questions about
> > this email.
> ------- End of Original Message -------
> 
> 
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