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Data Compression Objects Expand / Collapse
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Posted Monday, December 16, 2013 9:37 PM


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






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Post #1523520
Posted Monday, December 16, 2013 10:20 PM


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Nice solid yet simple enough question, thanks

Hope this helps...

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Post #1523526
Posted Tuesday, December 17, 2013 12:10 AM


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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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Post #1523542
Posted Tuesday, December 17, 2013 12:49 AM


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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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Posted Tuesday, December 17, 2013 1:49 AM


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Nice question, thanks.



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Post #1523564
Posted Tuesday, December 17, 2013 6:40 AM
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+1 Steve. Thanks
Post #1523660
Posted Tuesday, December 17, 2013 6:40 AM


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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.
Post #1523661
Posted Tuesday, December 17, 2013 7:17 AM


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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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Post #1523676
Posted Tuesday, December 17, 2013 7:47 AM


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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
www.seavus.com
Post #1523692
Posted Tuesday, December 17, 2013 8:12 AM


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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!
Post #1523714
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