Date: Tue, 24 Nov 2015 17:11:54 +0100 From: Albert Cervin <albert@acervin.com> To: Mike Tancsa <mike@sentex.net> Cc: Adam Vande More <amvandemore@gmail.com>, "freebsd-stable@freebsd.org" <freebsd-stable@freebsd.org> Subject: Re: ZFS - poor performance with "large" directories Message-ID: <CAMMK2LC2dH2KWgqLS9MfxH7gp1wnqBPrbzEJFWfUDxrtzNG5CQ@mail.gmail.com> In-Reply-To: <5654855F.2070502@sentex.net> References: <CAMMK2LCB5ocjyufZCMXQScQDgVxvSHOr0vmef6LKzPO35w3TQg@mail.gmail.com> <CA%2BtpaK3czSuxGH0J%2BVyPRfC8CiGJBk_CPf=bwQzxLjM94RCY9A@mail.gmail.com> <CAMMK2LBCpgb8SPZrC0to9kHHWzFvgvSzaiKjpH-PQm22q%2B=n3g@mail.gmail.com> <5654855F.2070502@sentex.net>
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"8G is not that much really. In the thread they suggested increasing the meta limit so that the giant directory can fit into cache." It is not really short on ram judging from the usage though and sure 8Gb is not that much but on the other hand, neither is 8000 files in one directory in my opinion... Will try a bit with the meta limit. Thanks, Albert On Tue, Nov 24, 2015 at 4:42 PM, Mike Tancsa <mike@sentex.net> wrote: > On 11/24/2015 10:26 AM, Albert Cervin wrote: >> vfs.zfs.txg.timeout is already verified to be 5 (the default). I have >> also turned off atime and vfs.zfs.arc_meta_limit is 1287906304. >> >> "Do you have any memory pressures on your server ? Have a look at this >> thread" >> >> The server has 4 cores and 8Gb of memory and there is no memory >> pressure on the server. Thanks, will look at the thread! >> >> The setup is _really_ simple with just a single pool and no datasets. >> >> Any more ideas? > > 8G is not that much really. In the thread they suggested increasing the > meta limit so that the giant directory can fit into cache. > > ---Mike > > > > -- > ------------------- > Mike Tancsa, tel +1 519 651 3400 > Sentex Communications, mike@sentex.net > Providing Internet services since 1994 www.sentex.net > Cambridge, Ontario Canada http://www.tancsa.com/
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