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From: "Steven Hartland" <killing@multiplay.co.uk>
To: "Adrian Gschwend" <ml-ktk@netlabs.org>,
 "Adam Vande More" <amvandemore@gmail.com>
References: <531DF0DD.8070809@netlabs.org>
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Subject: Re: Reoccuring ZFS performance problems
Date: Mon, 10 Mar 2014 17:51:39 -0000
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----- Original Message ----- 
From: "Adrian Gschwend" <ml-ktk@netlabs.org>
To: "Adam Vande More" <amvandemore@gmail.com>
Cc: "freebsd-fs" <freebsd-fs@freebsd.org>
Sent: Monday, March 10, 2014 5:36 PM
Subject: Re: Reoccuring ZFS performance problems


> On 10.03.14 18:27, Adam Vande More wrote:
> 
> Hi Adam,
> 
>> Are you using a ZFS backed swap device? 
> 
> does not look like:
> 
>       34  419430333  vtbd0  GPT  (200G)
>        34        128      1  freebsd-boot  (64k)
>       162    8388608      2  freebsd-swap  (4.0G)
>   8388770  411041597      3  freebsd-zfs  (196G)

If your hitting swap you'll likely hit a performance wall, does
top show any swapping in or are you just seeing slow swap out
of unused processes?

    Regards
    Steve

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