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Re: [Xen-users] domUs high memory usage (FC5 -- Xen 3.0.2)

To: "Hans de Hartog" <dehartog@xxxxxxxxxx>
Subject: Re: [Xen-users] domUs high memory usage (FC5 -- Xen 3.0.2)
From: dgreen@xxxxxxxxxxx
Date: Sun, 3 Sep 2006 14:26:57 -0400 (EDT)
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Thanks for your response Hans.

I have only used the ping command and nothing more.  Are there other
services in the background that are starting and grabbing this memory?  I
have used Solaris, FC5, SuSE without Xen and never noticed this hogging of
all the memory for such a period of time.  So, you're saying that each
time I do a top on a VM I will see 'Mem: 262284k total, 256996k used' and
that this is normal?


>> Situation:
>> I start up my domU's (in a console) and they seem to run at ~75MB (out
>> of
>> 256MB) of memory.  The only thing I have done on the VMs is to use ping
>> to
>> test RTT's.  I come back to the VM's the next day and notice that all of
>> them are running ~256MB.  I haven't started any other services.
> Hello Vince,
> That's a unix filosofy: free memory is a waiste. Therefore, whatever
> the memory is used for (buffers, cache, programs) is not freed if
> not necessary to do other things. So eventually most of the memory
> is in use because if you need something you used before, it is faster
> if it is still in memory than to read it from disk again.
> Regards,
> Hans.

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