If the cached performance ist about 340 MB/Sec the this seems to be a very
poor system.
The cached performance is nearly the memory performance of your system. On
my
little Athlon 2600 with bad VIA Chipset i have nearly the same cached
perfomance,
but with an Intel Server Board with a Pentium 4 with 3.2 GHz i have about
1280MB/sec
same on a dual core Xeon!
A resent system should have above 1000MB/sec!!

Michael

_____

Von: firebird-support@yahoogroups.com
[mailto:firebird-support@yahoogroups.com] Im Auftrag von Lester Caine
Gesendet: Dienstag, 18. Dezember 2007 14:34
An: firebird-support@yahoogroups.com
Betreff: Re: [firebird-support] Linux is slow



Thomas Løcke wrote:

> Lester Caine wrote:
>> No raid - two ATA133 drives 80Gb and 500Gb - formatted ext3 partitions.
>>
>> /var directory is on the big drive and the database is being accessed

from there.

>> Everything else on the smaller drive - / = 8Gb partition - 4Gb swap and

the

>> balance /home
>> Machine has 4Gb ram and the database is only 100Mb
>>
>> The next question would be how to do performance testing in Mandriva

Linux :)

>
> Well, you could do a very basic
>
> $ hdparm -Tt /dev/xxx
>
> Where /dev/xxx is the partition where /var is mounted.
>
> I've got a Slackware 12 rig running with two SATA 300GB disks, and my
> results are as follows:
>
> Timing cached reads: 7260 MB in 2.00 seconds = 3635.45 MB/sec
> Timing buffered disk reads: 184 MB in 3.01 seconds = 61.22 MB/sec
>
> If your results are very low, then you might've found a bottleneck.
>
> Just be careful with hdparm. It's not something you normally should be
> messing about with. -Tt should be safe enough though. :o)

Well cached is a tenth of yours - 337Mb/sec but buffered is 84Mb/sec so I
don't see that is a bottleneck particularly?

--
Lester Caine - G8HFL
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