Date: Thu, 12 Jun 2014 01:26:09 +0100 From: "Steven Hartland" <killing@multiplay.co.uk> To: "Matthias Andree" <matthias.andree@gmx.de>, <freebsd-current@freebsd.org> Subject: Re: CURRENT: why is CURRENT swapping so fast? Message-ID: <46D4CB84655148FE9A5F7578E5F4A8FD@multiplay.co.uk> References: <20140612003612.25cc2851.ohartman@zedat.fu-berlin.de> <5398F2A2.2020808@gmx.de>
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----- Original Message -----
From: "Matthias Andree" <matthias.andree@gmx.de>
> Am 12.06.2014 00:36, schrieb O. Hartmann:
>>
>> I use my boxes for daily work and in most cases, the usage of applications is the same.
>> Compiling the OS and updating ports while having claws-mail and firefox opened is some
>> usual scenario.
>>
>> I realise since a couple of weeks, if not months now, but always sticky to 11.0-CURRENT,
>> that the system is even with 8 GB RAM very quickly out of memory and swapping. As of
>> today - updating CURRENT (buildword) and also updating ports. Nothing else except
>> firefox. And the box is using 1% swapspace.
>
> Are you using ZFS, and more to the point, did you recently start using it?
>
> Do you mean "start swapping out sooner than it used to do"?
>
> Do you expect that swap remains at 0 unless there is serious memory
> pressure?
>
> One point: Linux rolls dice when it needs memory, with a tunable that
> states the chance that either a cached page gets evicted, or an in-use
> page gets swapped out.
>
> Has FreeBSD similar mechanisms these days?
Also how recent a current there where some vm changes which apparently helped with this
specifically r260567 and r265944.
Regards
Steve
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