Date: Thu, 21 Jul 2011 17:31:42 -0300 From: Luiz Otavio O Souza <lists.br@gmail.com> To: Ivan Voras <ivoras@freebsd.org> Cc: freebsd-fs@freebsd.org Subject: Re: ZFS and large directories - caveat report Message-ID: <0DBC88EC-7907-4DEE-8086-E3071590F800@gmail.com> In-Reply-To: <CAF-QHFUf_PV0RQ5sUJhnZGD04-BSbE0_mNW%2BshBGB-7YaPz-1w@mail.gmail.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> <5542D910-0C5C-4B2B-885F-CC92901367F0@gmail.com> <CAF-QHFVGWO9-sxZAw-sFyoVZVTs=HQN0AX=4OpeaGv4_qLhWLw@mail.gmail.com> <CAF-QHFUf_PV0RQ5sUJhnZGD04-BSbE0_mNW%2BshBGB-7YaPz-1w@mail.gmail.com>
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On Jul 21, 2011, at 5:04 PM, Ivan Voras wrote: > The "load.." lines in between are me hitting Ctrl-T for process info. > Observe almost 20 seconds delay in the middle of "ls"! What do you have for the the first column on gstat (L(q) values) ? The server in question is a DELL R710 that comes as a poor choice on = bought (nobody notice the SATA disks until the server was installed - = then it was too late for a exchange). It was a lot worse at beginning and adding the following lines (to = /boot/loader.conf) did help a little bit (it is usable now, even when it = is fully loaded by find requests - usable but not normal -). vfs.zfs.vdev.min_pending=3D1 vfs.zfs.vdev.max_pending=3D1 Not sure if this will help with your hardware, but you can give it a try = if you're seeing high values for the L(q) column. Luiz=
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