7.0-Release and 3ware 9550SXU w/BBU - horrible write performance

[Andrew L. Davydov]

alan bryan пишет:
> Hi,
>
> I've got a new server with a 3ware 9550SXU with the
> Battery.  I am using FreeBSD 7.0-Release (tried both
> 4BSD and ULE) using AMD64 and the 3ware performance
> for writes is just plain horrible.  Something is
> obviously wrong but I'm not sure what.
>
>
>   
Hi!

Try to add the following variable in your /etc/sysctl.conf

#Disk TWA
vfs.hirunningspace=5242880
vfs.read_max=256

reboot or execute /etc/rc.d/sysctl start
and try your test again


My results

Seeker 1...Seeker 2...Seeker 3...start 'em...done...done...done...
-------Sequential Output-------- ---Sequential Input-- --Random--
-Per Char- --Block--- -Rewrite-- -Per Char- --Block--- --Seeks---
Machine MB K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU /sec %CPU
1024 80443 80.6 104481 45.2 43386 19.1 84372 80.4 507936 98.6 19422.9 192.7

Machine MB K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU /sec %CPU
100 51012 46.6 103153 38.0 27272 7.4 116210 98.7 989831 99.3 72496.6 183.3



-- 
Best regards
Mr Andrew L. Davydov
+7 985 773 8819