Date: Thu, 21 Jul 2011 11:48:12 -0700 From: David P Discher <dpd@bitgravity.com> To: Ivan Voras <ivoras@freebsd.org> Cc: freebsd-fs@freebsd.org Subject: Re: ZFS and large directories - caveat report Message-ID: <E3F8D6EC-2CCA-49A2-9BFD-982BF01A3531@bitgravity.com> In-Reply-To: <CAF-QHFUs7OAAwcFvSymc3YYX3Cdq%2BQUUSP_4OFXCegCbzLkOUA@mail.gmail.com> References: <j09hk8$svj$1@dough.gmane.org> <13577F3E-DE59-44F4-98F7-9587E26499B8@gmail.com> <CAF-QHFUs7OAAwcFvSymc3YYX3Cdq%2BQUUSP_4OFXCegCbzLkOUA@mail.gmail.com>
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Ivan - 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 ? How much cpu are the 'arc_reclaim_thread' and 'l2arc_feed_thread' taking = up ? top -SHb 500 | grep arc --- David P. Discher dpd@bitgravity.com * AIM: bgDavidDPD BITGRAVITY * http://www.bitgravity.com On Jul 21, 2011, at 10:18 AM, Ivan Voras wrote: > On 21 July 2011 18:38, Luiz Otavio O Souza <lists.br@gmail.com> wrote: >=20 >> The general usage on this server is fine, but the periodic (daily) = scripts take almost a day to complete and the server is slow as hell = while the daily scripts are running. >=20 > Yes, this is how my problem was first diagnosed. >=20 >> So, yes, i can confirm that running 'find' on a ZFS FS with a lot of = files is very, very slow (and looks like it isn't related to how the = files are distributed on the FS). >=20 > Only it's not just "find" - it's any directory operations - including > file creation and removal. I cannot say that is not related to how > files are distributed on the file system, except the unusually long > operations on the parent of the shard directories in my case. > _______________________________________________ > freebsd-fs@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-fs > To unsubscribe, send any mail to "freebsd-fs-unsubscribe@freebsd.org"
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