Date: Fri, 25 Oct 2013 09:08:58 +0100 From: "Steven Hartland" <killing@multiplay.co.uk> To: "Vitalij Satanivskij" <satan@ukr.net> Cc: Vitalij Satanivskij <satan@ukr.net>, freebsd-current@freebsd.org, Dmitriy Makarov <supportme@ukr.net> Subject: Re: ZFS L2ARC - incorrect size and abnormal system load on r255173 Message-ID: <96FA3CD4CDCE49268EF41E28FF4E9381@multiplay.co.uk> References: <1381166916.122992963.5h9ygiri@frv45.ukr.net> <1381170764.32684.31088349.343931EE@webmail.messagingengine.com> <20131007185032.GA82932@hell.ukr.net> <20131007211201.GA89306@hell.ukr.net> <20131010092223.GA28347@hell.ukr.net> <5256D9D4.2030308@allanjude.com> <20131010170334.GA71635@hell.ukr.net> <3E3F85F87B0D40C6A776A42786EEF08D@multiplay.co.uk> <20131022141055.GA34810@hell.ukr.net> <5C339A76AE4C402BA5F9F1470500246A@multiplay.co.uk> <20131025073219.GA4086@hell.ukr.net>
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I would have expected zero for all l2_compress values.
Regards
Steve
----- Original Message -----
From: "Vitalij Satanivskij" <satan@ukr.net>
To: "Steven Hartland" <killing@multiplay.co.uk>
Cc: "Vitalij Satanivskij" <satan@ukr.net>; "Dmitriy Makarov" <supportme@ukr.net>; <freebsd-current@freebsd.org>
Sent: Friday, October 25, 2013 8:32 AM
Subject: Re: ZFS L2ARC - incorrect size and abnormal system load on r255173
> Just after system reboot with this patch
>
> found
> kstat.zfs.misc.arcstats.l2_compress_successes: 6083
> kstat.zfs.misc.arcstats.l2_compress_zeros: 1
> kstat.zfs.misc.arcstats.l2_compress_failures: 296
>
> compression on test pool (where I'm test this patch) is lz4
>
> so is it ok ?
>
>
>
> Steven Hartland wrote:
> SH> If you are still seeing high load try commenting out the following
> SH> which should disable l2arc compression.
> SH> sys/cddl/contrib/opensolaris/uts/common/fs/zfs/arc.c
> SH> if (l2arc_compress)
> SH> hdr->b_flags |= ARC_L2COMPRESS;
> SH>
>
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