Disk Throughput and Write times.

[rliebsch]

Just a quick question. I have been troubleshooting sudden poor performance lately...

What kind of bytes/sec are you all getting to your database disks?

I have a RAID5 set up across 4 disks (i know I know, reprimend me later, I have another array on the way to set up raid10), but I am only getting a max of 2433497.880 (according to perfmon) which is what, just over 2MB/second.

I just want confirmation that something is hardware wrong, because I have write queues into the 200's, disk sec/read is like 400ms, disk sec/write is around 700ms. Everyone is tired of Outlook Trying to Receive Data, and tired of their BLackberries lagging 15-30 minutes.

suggestions?

Robert Liebsch
Stone Yamashita Partners

http://www.stoneyamashita.com/

 

[macleod1021]

Do you have a drive going/gone bad? Easiest way is if your drives have fault lights; if not, make sure that all hard drive activity lights blink at the same time and rate. If one drive stays on or off, then it's a pretty good indication that it's bad.

 

[Echolord]

You also may want to check the firmware and drivers for your Raid Controller. It is recommended that your drivers be at current within the last 2 years.