intr using Swap

Miroslav Lachman 000.fbsd at quip.cz
Thu Feb 18 08:03:08 UTC 2016


Doug Hardie wrote on 02/18/2016 07:50:
>
>> On 17 February 2016, at 17:45, Lowell Gilbert <freebsd-stable-local at be-well.ilk.org> wrote:
>>
>> Doug Hardie <bc979 at 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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