Unresponsive system

[Polytropon]

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, ...