Date: Thu, 17 Sep 2015 13:16:01 -0500 From: Adam Vande More <amvandemore@gmail.com> To: Bernard Higonnet <bthcom@higonnet.net> Cc: FreeBSD Questions <freebsd-questions@freebsd.org> Subject: Re: Constantly running out of swap space Message-ID: <CA%2BtpaK3Cu9yT6yt1mSTAdRZf81KyTd3h3doKj5ywcEycs4GiTg@mail.gmail.com> In-Reply-To: <55FAFEE4.5080701@higonnet.net> References: <55FAFEE4.5080701@higonnet.net>
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On Thu, Sep 17, 2015 at 12:56 PM, Bernard Higonnet <bthcom@higonnet.net> wrote: > Using FreeBSD 10.2 > > I'm using a swap file set up as described at > https://www.freebsd.org/doc/handbook/adding-swap-space.html > > 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. -- Adam
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