Date: Wed, 19 Dec 2007 18:07:05 -0200 From: "Alexandre Biancalana" <biancalana@gmail.com> To: "Mike Tancsa" <mike@sentex.net> Cc: freebsd-performance@freebsd.org Subject: Re: Bad performance when accessing a lot of small files Message-ID: <8e10486b0712191207r5e256b84xf6cb0bbafc6cfd20@mail.gmail.com> In-Reply-To: <200712191942.lBJJgWmJ018860@lava.sentex.ca> References: <8e10486b0712191109n3d21b02cyf5183ee0cd01d8ce@mail.gmail.com> <200712191942.lBJJgWmJ018860@lava.sentex.ca>
next in thread | previous in thread | raw e-mail | index | archive | help
On 12/19/07, Mike Tancsa <mike@sentex.net> wrote:
> At 02:09 PM 12/19/2007, Alexandre Biancalana wrote:
>
> >The behavior that I'm observing and that want your help is when the
> >system is accessing some directory with many small files ( directories
> >with ~ 1 million of ~30kb files), the performance is very poor.
>
> Hi,
I'm using zfs, I think this change the things.. no ?
> Have you adjusted the dirhash value ? What does
>
> sysctl -a vfs.ufs | grep dirhash
# sysctl -a vfs.ufs | grep dirhash
vfs.ufs.dirhash_docheck: 0
vfs.ufs.dirhash_mem: 1410338
vfs.ufs.dirhash_maxmem: 2097152
vfs.ufs.dirhash_minsize: 2560
>
> show on your box ? Also, do you have a lot of UIDs in your passwd file ?
No.
# wc -l /etc/passwd
45 /etc/passwd
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?8e10486b0712191207r5e256b84xf6cb0bbafc6cfd20>