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Data Compression Objects


Data Compression Objects

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Steve Jones
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Comments posted to this topic are about the item Data Compression Objects

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Ford Fairlane
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Nice solid yet simple enough question, thanks

Hope this helps...

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Koen Verbeeck
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I have been enabling page compression on our entire data warehouse recently, so this was a pretty easy question :-)


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Koen Verbeeck (12/17/2013)
I have been enabling page compression on our entire data warehouse recently, so this was a pretty easy question :-)


Whats your performance been like since ?

Hope this helps...

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Igor Micev
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Nice question, thanks.

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steve.jacobs
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+1 Steve. Thanks
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Ford Fairlane (12/17/2013)
Koen Verbeeck (12/17/2013)
I have been enabling page compression on our entire data warehouse recently, so this was a pretty easy question :-)


Whats your performance been like since ?


I was about to ask this same thing. I have been considering doing this as well. So far I have only added page compression to our archive tables and not to ones being accessed more frequently.
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Koen Verbeeck (12/17/2013)
I have been enabling page compression on our entire data warehouse recently, so this was a pretty easy question :-)


What kind of compression ratio have you obtained?

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Igor Micev
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KWymore (12/17/2013)
Ford Fairlane (12/17/2013)
Koen Verbeeck (12/17/2013)
I have been enabling page compression on our entire data warehouse recently, so this was a pretty easy question :-)


Whats your performance been like since ?


I was about to ask this same thing. I have been considering doing this as well. So far I have only added page compression to our archive tables and not to ones being accessed more frequently.


If the compression brings you over 70% storage gain, than you should compress without any measurements, otherwise you should make some measurements concerning the CPU usage on compressed and uncompressed tables.

Once I did some investigation on compression on a small system. I compressed the entire database (mixed: page and row) and run a tool that was processing data against compressed and uncompressed databases. The processing time was same, and i obtained a storage gain. The avg CPU usage increased but not for much. It's recommended the avg CPU should not be more than 80%. So you can even compress the more frequently accessed tables.

If the reads operations dominate over the writes (e.g. more than 95:5) than you go with compression.

Regards
IgorMi

Igor Micev,
SQL Server developer at Seavus
My blog: www.igormicev.com
Ken Wymore
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IgorMi (12/17/2013)
KWymore (12/17/2013)
Ford Fairlane (12/17/2013)
Koen Verbeeck (12/17/2013)
I have been enabling page compression on our entire data warehouse recently, so this was a pretty easy question :-)


Whats your performance been like since ?


I was about to ask this same thing. I have been considering doing this as well. So far I have only added page compression to our archive tables and not to ones being accessed more frequently.


If the compression brings you over 70% storage gain, than you should compress without any measurements, otherwise you should make some measurements concerning the CPU usage on compressed and uncompressed tables.

Once I did some investigation on compression on a small system. I compressed the entire database (mixed: page and row) and run a tool that was processing data against compressed and uncompressed databases. The processing time was same, and i obtained a storage gain. The avg CPU usage increased but not for much. It's recommended the avg CPU should not be more than 80%. So you can even compress the more frequently accessed tables.

If the reads operations dominate over the writes (e.g. more than 95:5) than you go with compression.

Regards
IgorMi




Thank you, I will keep that in mind when I am able to get back to that testing!
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