Re: IO Bottleneck
- From: "John Fullbright [MVP]" <fjohn@donotspamnetappdotcom>
- Date: Tue, 22 Aug 2006 22:52:55 -0700
At a minimum, you should have a mirror for the OS, a mirror for the logs,
and a mirror (or RAID 10) for the databases. I'd hazard a guess that the
write times on the the RAID 5 array far exceed 20ms.
"Ariel" <Ariel@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote in message
news:F0839239-546B-4AA9-8B55-5B0E7A4DC986@xxxxxxxxxxxxxxxx
I have recently become the administrator of an Exchange 2003 Server. These
are the server specs:
HP Proliant DL380 G3
Dual Xeon 2.8GHz
2GB RAM
Smart Array 5i Controller with 64MB and read-only cache
4 x 300GB Ultra320 10K Hard Drives in a RAID 5 array
I have been assigned the task to investigate a possible bottleneck, since
users were seeing the RPC dialog frecuently. I ran the Performance
Troubleshooting Analyzer, and of course, the results indicated a disk
bottleneck.
The server has room for 2 more hard drives. I tried adding a 73GB disk,
and
using it for the database logs, then ran the PTA again, and now the report
says that I have a disk bottleneck in all the roles that remained on the
primary array.
I am going to add another 73GB disk to make a RAID 1 array, and move the
logs anyways, but I was wondering if I should transfer another role to
that
new volume.
I am also considering buying an upgrade for the controller to add 128MB of
battery-backed write cache, if it would help.
I would appreciate any advice you have to offer.
Regards,
Ariel.
.
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