Date: Sat, 25 Apr 2015 13:47:06 +0300 From: Konstantin Belousov <kostikbel@gmail.com> To: Dmitry Morozovsky <marck@rinet.ru> Cc: freebsd-stable@FreeBSD.org Subject: Re: protecting some processes from out-of-swap killer Message-ID: <20150425104706.GF2390@kib.kiev.ua> 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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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. 64G RAM is not big by modern standards, normally populated desktop can take 32G. > > 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? Read protect(1). > > Quick googling does not help, at least I could not find answers relevant > enough. > > Thanks! > > > -- > Sincerely, > D.Marck [DM5020, MCK-RIPE, DM3-RIPN] > [ FreeBSD committer: marck@FreeBSD.org ] > ------------------------------------------------------------------------ > *** Dmitry Morozovsky --- D.Marck --- Wild Woozle --- marck@rinet.ru *** > ------------------------------------------------------------------------ > _______________________________________________ > freebsd-stable@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-stable > To unsubscribe, send any mail to "freebsd-stable-unsubscribe@freebsd.org"
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