|
Joined: Oct 2002
Posts: 71
Power User
|
Power User
Joined: Oct 2002
Posts: 71 |
Anyone know a good way to find out if disks are a bottle neck?
Right now I'm running mysql for ubbthreads on a IDE software RAID 5 system. The drives are 7200rpm and run pretty well. In that system I have a 15k RPM SCSI drive as well.
I'm trying to figure out if purchasing a couple more SCSI drive and make it a raid5 would be worth it, hence the question on determining bottle necks.
CPU load now is between 30-40% on a Dual 1.1 PIII, and if going to SCSI gets me a bonus year, it's probably worth it. (already have 2GB Ram onthe system).
TIA
Fred
|
|
|
|
Joined: Feb 2002
Posts: 1,759
Addict
|
Addict
Joined: Feb 2002
Posts: 1,759 |
The disks may be the bottleneck, as you obviously have a good deal of ram and dual processors.. not the fastest, but still not too shabby either. The best thing to check is to see whether or not UltraATA is setup on your IDE drives. Sometimes even if you have 66MB/s+ drives, they may only be set in PIO mode or DMA mode, hence keeping your data transfer rate at the maximum, 33MB/s. Typically most providers will configure the servers to utilize the disks properly, but it is always worth checking to be sure. Here is an article that talks about disk performance with linux and how to get some information regarding your setup: http://linux.oreillynet.com/pub/a/linux/2000/06/29/hdparm.htmlHere are some other useful links: http://www.faqs.org/docs/securing/chap6sec74.htmlhttp://www.linuxgazette.com/issue79/punk.htmlOf course, upgrading to a RAID SCSI setup will certainly help your read/write times, it may not be the only answer. How large of a database are you running? More than one site? How many users currently connected? Etc... But that should get you started.
|
|
|
|
Joined: Oct 2002
Posts: 71
Power User
|
Power User
Joined: Oct 2002
Posts: 71 |
Thanks Jeremy, I'll have a look at that stuff tonight.
I don't remember exactly the size of the ubbthreads DB, but the sql dumps are about 1/2 GB. There are other DBs running, but not that busy. Users can max out around 150 logged in and another 150-200 in a 30minute period.
|
|
|
|
Joined: Feb 2002
Posts: 1,759
Addict
|
Addict
Joined: Feb 2002
Posts: 1,759 |
Sounds about like my site.. DB is upwards of a half gig, and typically about 100 users online, max of 134. I'm running mine on a single P4. 2.4GHz machine I believe it is, with a 7200 RPM drive as well with 1 gig of ram. Things seem to be still running smoothly as far as I can tell.
There are also a few other sites and databases on the server, but are small in comparison.
|
|
|
|
Joined: Sep 2001
Posts: 129
Member
|
Member
Joined: Sep 2001
Posts: 129 |
Dont use raid 5 buy another drive and use raid 10 a lot better for random database work
Regards Clint
Running on WIN2003 Web Server.
Paranoid people get followed too!
|
|
|
|
Joined: May 1999
Posts: 1,715
Addict
|
Addict
Joined: May 1999
Posts: 1,715 |
What's the difference between RAID 5 and RAID 10?
|
|
|
|
Joined: Oct 2000
Posts: 2,223
Veteran
|
Veteran
Joined: Oct 2000
Posts: 2,223 |
http://www.raid.com/04_01_00.htmlAll the raid levels explained in easy terms, for dummies like me, with pictures.
Picture perfect penmanship here.
|
|
|
|
Joined: May 1999
Posts: 1,715
Addict
|
Addict
Joined: May 1999
Posts: 1,715 |
Thanks, that was a very informative page!
|
|
|
Donate to UBBDev today to help aid in Operational, Server and Script Maintenance, and Development costs.
Please also see our parent organization VNC Web Services if you're in the need of a new UBB.threads Install or Upgrade, Site/Server Migrations, or Security and Coding Services.
|
|
Posts: 5,833
Joined: January 2000
|
|
Forums63
Topics37,573
Posts293,925
Members13,849
|
Most Online5,166 Sep 15th, 2019
|
|
Currently Online
Topics Created
Posts Made
Users Online
Birthdays
|
|
|
|