Date: Thu, 25 Aug 2005 23:25:23 +0200 From: Marian Hettwer <MH@kernel32.de> To: Mike Tancsa <mike@sentex.net> Cc: freebsd-current@freebsd.org Subject: Re: filesystem performance with lots of small files Message-ID: <430E3743.3030108@kernel32.de> In-Reply-To: <6.2.3.4.0.20050825135916.07a19ac8@64.7.153.2> References: <430E06AA.2000907@kernel32.de> <6.2.3.4.0.20050825135916.07a19ac8@64.7.153.2>
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Hi Mike,
Mike Tancsa wrote:
> At 01:58 PM 25/08/2005, Marian Hettwer wrote:
>
>> couldn't find any sysctl'´s or kernel parameters.
>> I'll report numbers, as soon as I have them.
>> And yes, I disabled the debugging features in my kernel (WITNESS,
>> INVARIANTS ...)
>> Besides, I know that 6-BETA is not about performance at all :)
>>
>> any tips on file system performance with small files, though ?
>
>
> It might be hitting the dirhash max mem value. What does
> vfs.ufs.dirhash_maxmem and vfs.ufs.dirhash_mem show ?
>
I didn't changed anything from the defaults... it looks like that:
mhettwer@submaster-test$ sysctl vfs.ufs.dirhash_maxmem
vfs.ufs.dirhash_maxmem: 2097152
mhettwer@submaster-test$ sysctl vfs.ufs.dirhash_mem
vfs.ufs.dirhash_mem: 368622
By the way, the copy job of my small files finished, so here we go with
some small facts :)
mhettwer@submaster-test$ sudo time find /usr/tmp/ | wc -l
133.81 real 2.01 user 3.95 sys
2904696
nearly three million files. quite a lot ...
regards,
Marian
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