Date: Wed, 29 Mar 2017 04:45:28 +0200 From: Polytropon <freebsd@edvax.de> To: Janos Dohanics <web@3dresearch.com> Cc: FreeBSD Questions <freebsd-questions@freebsd.org> Subject: Re: Unresponsive system Message-ID: <20170329044528.63cec581.freebsd@edvax.de> In-Reply-To: <20170328160634.611573c82e88e1ca12d25891@3dresearch.com> References: <20170328160634.611573c82e88e1ca12d25891@3dresearch.com>
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On Tue, 28 Mar 2017 16:06:34 -0400, Janos Dohanics wrote: > The system is FreeBSD 11.0-STABLE #0 r314885 amd64. It is mostly used > to run Cyrus, Postfix, Amavisd, Clamd. Kernel is not customized, except > for "ident". > > Could this problem be related to the additional swap space provided by a swapfile? > > # cat /etc/fstab > # Device Mountpoint FStype Options Dump Pass# > /dev/ada0p2 none swap sw 0 0 > /dev/ada0p3 / ufs rw 1 1 > /dev/ada0p4 none swap sw 0 0 > md0 none swap sw,file=/swapfile,late 0 0 > > # swapinfo -hm > Device 1M-blocks Used Avail Capacity > /dev/ada0p2 256 241M 15M 94% > /dev/ada0p4 750 290M 460M 39% > /dev/md0 4096 289M 3.7G 7% > Total 5102 820M 4.2G 16% > > I'd appreciate your advice. Do you have statistics about your CPU and I/O load? Both can cause a system to become unresponsive. Using swap will start in case the RAM is "full", and because you have three mechanisms of swap on the same disk (ada0), this could be the reason: You have two swap partitions and a swap file, all of them residing on the same disk, and all of them are in use, so that could be the reason for I/O load... -- Polytropon Magdeburg, Germany Happy FreeBSD user since 4.0 Andra moi ennepe, Mousa, ...
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