Date: Sat, 25 Apr 2015 12:43:36 +0200 From: Baptiste Daroussin <bapt@FreeBSD.org> To: Dmitry Morozovsky <marck@rinet.ru> Cc: freebsd-stable@FreeBSD.org Subject: Re: protecting some processes from out-of-swap killer Message-ID: <20150425104336.GD13141@ivaldir.etoilebsd.net> In-Reply-To: <alpine.BSF.2.00.1504251316020.43520@woozle.rinet.ru> References: <alpine.BSF.2.00.1504251316020.43520@woozle.rinet.ru>
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[-- Attachment #1 --] On Sat, Apr 25, 2015 at 01:31:14PM +0300, Dmitry Morozovsky wrote: > Hi there colleagues, > > I have stable/10 on a rather big machine (2*8*2 e5 Xeon, 64G RAM, SAS+SSD ZFS > raid10+ZIL+L2ARC) acting as a PostgreSQL server. > > To use such a big resource pool that is mostly idle, I'd deployed poudriere > there (using tmpfs) too. > > Most times this combination works like a charm: LA could be 60+ and no visual > latency increase on SQL queries. > > However, sometimes postgres processes got killed by 'out of swap space'. > I suppose the source of problem could be that VSZ size of postgres processes > (8-9 G) is bigger than swap congigured (4G). > > Is there any way to prevent this, besides reallocating space for swap? > > Quick googling does not help, at least I could not find answers relevant > enough. > > Thanks! protect(1) ? Best regards, Bapt [-- Attachment #2 --] -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iEYEARECAAYFAlU7b9gACgkQ8kTtMUmk6EyPWgCdG6jHIEs8UyIPhQDJZ0AAMknP 3BQAnivyrsSl79NCoyA4gKNoCOj7NovQ =BDgz -----END PGP SIGNATURE-----
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