Re: ZFS L2ARC - incorrect size and abnormal system load on r255173

So that's patch not disabling compresion on l2arc?


Steven Hartland wrote:
SH> I would have expected zero for all l2_compress values.
SH> 
SH>     Regards
SH>     Steve
SH> 
SH> ----- Original Message ----- 
SH> From: "Vitalij Satanivskij" <satan_at_ukr.net>
SH> To: "Steven Hartland" <killing_at_multiplay.co.uk>
SH> Cc: "Vitalij Satanivskij" <satan_at_ukr.net>; "Dmitriy Makarov" <supportme_at_ukr.net>; <freebsd-current_at_freebsd.org>
SH> Sent: Friday, October 25, 2013 8:32 AM
SH> Subject: Re: ZFS L2ARC - incorrect size and abnormal system load on r255173
SH> 
SH> 
SH> > Just after system reboot with this patch 
SH> > 
SH> > found 
SH> > kstat.zfs.misc.arcstats.l2_compress_successes: 6083
SH> > kstat.zfs.misc.arcstats.l2_compress_zeros: 1
SH> > kstat.zfs.misc.arcstats.l2_compress_failures: 296
SH> > 
SH> > compression on test pool (where I'm test this patch) is lz4 
SH> > 
SH> > so is it ok ?
SH> > 
SH> > 
SH> > 
SH> > Steven Hartland wrote:
SH> > SH> If you are still seeing high load try commenting out the following
SH> > SH> which should disable l2arc compression.
SH> > SH> sys/cddl/contrib/opensolaris/uts/common/fs/zfs/arc.c
SH> > SH>         if (l2arc_compress)
SH> > SH>                 hdr->b_flags |= ARC_L2COMPRESS;
SH> > SH> 
SH> >
SH> 
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