SQL Clone
SQLServerCentral is supported by Redgate
 
Log in  ::  Register  ::  Not logged in
 
 
 


TempDB and SSDs


TempDB and SSDs

Author
Message
Lexa
Lexa
Old Hand
Old Hand (319 reputation)Old Hand (319 reputation)Old Hand (319 reputation)Old Hand (319 reputation)Old Hand (319 reputation)Old Hand (319 reputation)Old Hand (319 reputation)Old Hand (319 reputation)

Group: General Forum Members
Points: 319 Visits: 508
Has anyone noticed a significant boost in performance from running their TempDB on SSDs?
MyDoggieJessie
MyDoggieJessie
SSCertifiable
SSCertifiable (6.7K reputation)SSCertifiable (6.7K reputation)SSCertifiable (6.7K reputation)SSCertifiable (6.7K reputation)SSCertifiable (6.7K reputation)SSCertifiable (6.7K reputation)SSCertifiable (6.7K reputation)SSCertifiable (6.7K reputation)

Group: General Forum Members
Points: 6718 Visits: 7394
I can't say for tempdb specifically but have noticed improvements for IO operations from other DB's running on SSD, I recommend you run some testing using IOMeter or similar tool to simulate tempdb activity

______________________________________________________________________________
"Never argue with an idiot; They'll drag you down to their level and beat you with experience" ;-)
Lexa
Lexa
Old Hand
Old Hand (319 reputation)Old Hand (319 reputation)Old Hand (319 reputation)Old Hand (319 reputation)Old Hand (319 reputation)Old Hand (319 reputation)Old Hand (319 reputation)Old Hand (319 reputation)

Group: General Forum Members
Points: 319 Visits: 508
MyDoggieJessie (12/21/2012)
I can't say for tempdb specifically but have noticed improvements for IO operations from other DB's running on SSD, I recommend you run some testing using IOMeter or similar tool to simulate tempdb activity


IOMeter - are you referring to this? http://www.iometer.org/
Seems kind of old...
MyDoggieJessie
MyDoggieJessie
SSCertifiable
SSCertifiable (6.7K reputation)SSCertifiable (6.7K reputation)SSCertifiable (6.7K reputation)SSCertifiable (6.7K reputation)SSCertifiable (6.7K reputation)SSCertifiable (6.7K reputation)SSCertifiable (6.7K reputation)SSCertifiable (6.7K reputation)

Group: General Forum Members
Points: 6718 Visits: 7394
Yep that's the one. It may be old but it works. "Electricity" is quite old, but still works all the same :-D

______________________________________________________________________________
"Never argue with an idiot; They'll drag you down to their level and beat you with experience" ;-)
Lexa
Lexa
Old Hand
Old Hand (319 reputation)Old Hand (319 reputation)Old Hand (319 reputation)Old Hand (319 reputation)Old Hand (319 reputation)Old Hand (319 reputation)Old Hand (319 reputation)Old Hand (319 reputation)

Group: General Forum Members
Points: 319 Visits: 508
MyDoggieJessie (12/22/2012)
Yep that's the one. It may be old but it works. "Electricity" is quite old, but still works all the same :-D


I'm trying to measure performance of two storage arrays. One is not doing anything and the other has production system on it. When I run IOMeter on the system that has production on it, are the numbers going to be skewed because it already has a load on it? Is the comparison going to be accurate in my scenario?

Also what is the proffered setting for # of Outstanding I/Os per target? I've seen posts where people use 16 or 32. Is this setting supposed to be our average queue length?

Thanks
MyDoggieJessie
MyDoggieJessie
SSCertifiable
SSCertifiable (6.7K reputation)SSCertifiable (6.7K reputation)SSCertifiable (6.7K reputation)SSCertifiable (6.7K reputation)SSCertifiable (6.7K reputation)SSCertifiable (6.7K reputation)SSCertifiable (6.7K reputation)SSCertifiable (6.7K reputation)

Group: General Forum Members
Points: 6718 Visits: 7394
Yes it will be skewed. These types of tools need to be run for bench-marking purposes prior to anything being put on the disks (so the numbers can be more true). Yes that represents the queue length and from what I've read, I don't believe there's any benefit going beyond 32

The # of Outstanding I/Os control specifies the maximum number of outstanding asynchronous I/O operations per disk the selected worker(s) will attempt to have active at one time. (The actual queue depth seen by the disks may be less if the operations complete very quickly.) The default value is 1.

Note that the value of this control applies to each selected worker and each selected disk. For example, suppose you select a manager with 4 disk workers in the Topology panel, select 8 disks in the Disk Targets tab, and specify a # of Outstanding I/Os of 16. In this case, the disks will be distributed among the workers (2 disks per worker), and each worker will generate a maximum of 16 outstanding I/Os to each of its disks. The system as a whole will have a maximum of 128 outstanding I/Os at a time (4 workers * 2 disks/worker * 16 outstanding I/Os per disk) from this manager.

The user's guide for IOMeter can be viewed here

______________________________________________________________________________
"Never argue with an idiot; They'll drag you down to their level and beat you with experience" ;-)
Go


Permissions

You can't post new topics.
You can't post topic replies.
You can't post new polls.
You can't post replies to polls.
You can't edit your own topics.
You can't delete your own topics.
You can't edit other topics.
You can't delete other topics.
You can't edit your own posts.
You can't edit other posts.
You can't delete your own posts.
You can't delete other posts.
You can't post events.
You can't edit your own events.
You can't edit other events.
You can't delete your own events.
You can't delete other events.
You can't send private messages.
You can't send emails.
You can read topics.
You can't vote in polls.
You can't upload attachments.
You can download attachments.
You can't post HTML code.
You can't edit HTML code.
You can't post IFCode.
You can't post JavaScript.
You can post emoticons.
You can't post or upload images.

Select a forum

































































































































































SQLServerCentral


Search