Date: Thu, 18 Feb 2016 09:02:55 +0100 From: Miroslav Lachman <000.fbsd@quip.cz> To: Doug Hardie <bc979@lafn.org>, Lowell Gilbert <freebsd-stable-local@be-well.ilk.org> Cc: stable@freebsd.org, Efra?n D?ctor <efraindector@motumweb.com>, hiren panchasara <hiren@strugglingcoder.info> Subject: Re: intr using Swap Message-ID: <56C57AAF.9060507@quip.cz> In-Reply-To: <A38B949A-7667-4949-A017-28DCBE0D8C83@lafn.org> References: <56C4AF81.3040202@motumweb.com> <87f6fb602e0ad11b7600c70a08d74c30@dweimer.net> <56C4C244.8070805@motumweb.com> <d6b6f3959b51a4ba3b8ab86de5931ae2@dweimer.net> <56C4F7E9.9090405@motumweb.com> <20160217230138.GJ89208@strugglingcoder.info> <44d1rusuxs.fsf@lowell-desk.lan> <49F794B1-937F-4AEA-90CF-7C19AFF7EFE2@lafn.org> <447fi2sse9.fsf@lowell-desk.lan> <A38B949A-7667-4949-A017-28DCBE0D8C83@lafn.org>
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Doug Hardie wrote on 02/18/2016 07:50: > >> On 17 February 2016, at 17:45, Lowell Gilbert <freebsd-stable-local@be-well.ilk.org> wrote: >> >> Doug Hardie <bc979@lafn.org> writes: [...] >> Your observations are more useful, but I'm still not sure they indicate >> a problem that needs to be solved. There are clearly cases where >> significant quantities of swap can get used up storing copies of clean >> pages backing files on disk. Unless that slows down bringing in new >> pages that need to be read or written, I don't think that's a problem. > > > Well, the problem is quite significant for me in that eventually the system runs out of swap and starts killing processes. Its not quite random, but I haven't spent much time trying to figure out how it selects those to kill. The specific system unfortunately is remote (about a 3 hour drive) and when sshd gets killed, I have no option other than having someone go on site to reboot it. Was sshd ever killed? I think FreeBSD has some "exceptions" implemented and some processes have higher value - not to be killed so easily. I had some system without swap and there were many processes killed every few days, but never sshd. Miroslav Lachman
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