Date: Thu, 21 Jul 2011 16:36:49 -0300 From: Luiz Otavio O Souza <lists.br@gmail.com> To: David P Discher <dpd@bitgravity.com> Cc: freebsd-fs@freebsd.org, Ivan Voras <ivoras@freebsd.org> Subject: Re: ZFS and large directories - caveat report Message-ID: <5542D910-0C5C-4B2B-885F-CC92901367F0@gmail.com> In-Reply-To: <E3F8D6EC-2CCA-49A2-9BFD-982BF01A3531@bitgravity.com> References: <j09hk8$svj$1@dough.gmane.org> <13577F3E-DE59-44F4-98F7-9587E26499B8@gmail.com> <CAF-QHFUs7OAAwcFvSymc3YYX3Cdq%2BQUUSP_4OFXCegCbzLkOUA@mail.gmail.com> <E3F8D6EC-2CCA-49A2-9BFD-982BF01A3531@bitgravity.com>
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On Jul 21, 2011, at 3:48 PM, David P Discher wrote: >=20 > Ivan - >=20 > What's your uptime ? > Are you using l2 arc ? > what is the value of 'sysctl kstat.zfs.misc.arcstats.evict_skip' ? > is this increasing quickly ? >=20 Don't know about Ivan's case, but mine is definitively increasing it = quickly (and i'm not using l2arc): sysctl kstat.zfs.misc.arcstats.evict_skip = = =20 kstat.zfs.misc.arcstats.evict_skip: 129995601 And just a few minutes later (while running find on my 4 million files = FS): sysctl kstat.zfs.misc.arcstats.evict_skip kstat.zfs.misc.arcstats.evict_skip: 130589384 But i guess i need to increase the arc_meta_limit as well: vfs.zfs.arc_meta_limit: 536870912 vfs.zfs.arc_meta_used: 579461312 kstat.zfs.misc.arcstats.demand_data_hits: 4400985059 kstat.zfs.misc.arcstats.demand_data_misses: 699262 kstat.zfs.misc.arcstats.demand_metadata_hits: 1057208432 kstat.zfs.misc.arcstats.demand_metadata_misses: 32782389 kstat.zfs.misc.arcstats.prefetch_data_hits: 3302738888 kstat.zfs.misc.arcstats.prefetch_data_misses: 225108 kstat.zfs.misc.arcstats.prefetch_metadata_hits: 418744564 kstat.zfs.misc.arcstats.prefetch_metadata_misses: 147815306 kstat.zfs.misc.arcstats.evict_skip: 130781386 kstat.zfs.misc.arcstats.evict_l2_cached: 0 kstat.zfs.misc.arcstats.evict_l2_eligible: 2514187700736 kstat.zfs.misc.arcstats.evict_l2_ineligible: 176966735360 Unfortunately i need to wait a little bit until i can reboot this server = with the new sysctl values. Thanks everyone for the hints so far. Luiz=
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