ZFS L2ARC - incorrect size and abnormal system load on r255173

[Steven Hartland]

I would have expected zero for all l2_compress values.

    Regards
    Steve

----- Original Message ----- 
From: "Vitalij Satanivskij" <satan at ukr.net>
To: "Steven Hartland" <killing at multiplay.co.uk>
Cc: "Vitalij Satanivskij" <satan at ukr.net>; "Dmitriy Makarov" <supportme at ukr.net>; <freebsd-current at 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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