Constantly running out of swap space

Bernard Higonnet bthcom at
Thu Sep 17 18:52:20 UTC 2015

I'll try that, but something in my bones make me skeptical. For the kind 
of traffic I have trouble seeing so many workers spinning their wheels 
at the same time...

I think there's either something wrong with how I set up my swap space 
(highly likely) or a bug in swapping to a file in 10.2 (highly unlikely).

Bernard Higonnet

On 2015-09-17 20:16, Adam Vande More wrote:
> On Thu, Sep 17, 2015 at 12:56 PM, Bernard Higonnet <bthcom at>
> wrote:
>> Using FreeBSD 10.2
>> I'm using a swap file set up as described at
>> No matter what size I make it (last time 4GB) I run out of swap space on a
>> VPS with 768KB RAM. Space is being used by amavisd/clamd which is
>> apparently notorious space hungry, but it's clear to me there's a problem
>> somewhere. Everything works OK for a while (a few hours? on a system with
>> very little traffic (100 emails a day...)) and then runs out of space.
>> I assume amavisd/clamd are not using swap space explicitly and the OS
>> decides on is own that swap space is needed
> Only the kernel controls VM, not userland.  Userland tools can only make
> requests.
>> Any suggestions?
> If it was me, I'd remove any file backed swap you may have already added
> and then configure whatever is using swap to consume less.  In your case,
> amavisd/clamd have settings which will do so.  I would also eliminate any
> unnecessary services on the box.  Your VPS provider may also be able to
> provide you with a separate block device which can be used as dedicated
> swap although I would avoid doing that under most circumstances.

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