Comments on: Estimating Data Compression Savings in SQL Server 2012

By: GLENN BERRY

GLENN BERRY — Mon, 28 Jan 2019 23:21:22 +0000

PAGE is more effective than ROW compression. PAGE already includes ROW compression.

By: Techi

Techi — Wed, 23 May 2018 15:50:54 +0000

What is the best out of those two? ROW and PAGE compression can be applied together?

By: Glenn Berry

Glenn Berry — Mon, 21 May 2018 14:08:17 +0000

In reply to Adi. SQL Server Data compression does not work on image or blob data types.

By: Adi

Adi — Sun, 20 May 2018 20:37:51 +0000

Hi Glen, how to decompress data? I have a table full of “image” files, which are compressed. Is there any way to decompress files, before extraction to local drive, via sql server 2012?

Thank you!

By: Kyle

Kyle — Fri, 06 Jan 2017 20:20:05 +0000

In reply to Glenn Berry. Thank you!!

By: Glenn Berry

Glenn Berry — Fri, 06 Jan 2017 20:04:03 +0000

In reply to Kyle. If an index has lots of updates and deletes, the CPU cost to compress and decompress the data might outweigh the I/O and RAM savings from data compression.

By: Kyle

Kyle — Fri, 06 Jan 2017 19:49:24 +0000

GB, is there a ‘down-sides’ or negative side effects to compressing a table?

By: Glenn Berry

Glenn Berry — Fri, 14 Oct 2016 16:18:30 +0000

In reply to Alexandre.

You can simply pass in NONE as the last parameter to to sp_estimate_data_compression_savings

https://msdn.microsoft.com/en-us/library/cc280574.aspx?f=255&MSPPError=-2147217396

By: Alexandre

Alexandre — Fri, 14 Oct 2016 15:26:41 +0000

Hi Glenn, is there a way estimating the size of a table compressed after decompress. The opposite of sp_estimate_data_compression_savings ?

Thank you.