Comments on: SQL SERVER – Data and Page Compressions – Data Storage and IO Improvement

By: Glass Repair

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By: thakkermukund

thakkermukund — Wed, 06 Mar 2013 06:18:08 +0000

When I execute following command,
ALTER TABLE [dbo].tbl_MMSG REBUILD PARTITION = ALL
WITH
(DATA_COMPRESSION = PAGE
)
I get following message.

Msg 7738, Level 16, State 2, Line 1
Cannot enable compression for object ‘tbl_MMSG’. Only SQL Server Enterprise Edition supports compression.

Please let me know how to compress table in Enterprise Editiion

By: SQL SERVER – Weekly Series – Memory Lane – #018 | SQL Server Journey with SQL Authority

Sat, 02 Mar 2013 01:31:03 +0000

[...] Data and Page Compressions – Data Storage and IO Improvement In SQL Server data compression is implemented at two levels: ROW and PAGE. Even page compression automatically implements row compression. Tables and indexes can be compressed when they are created by using the CREATE TABLE and CREATE INDEX statements. [...]

By: satish yechuri

satish yechuri — Thu, 24 Jan 2013 13:24:23 +0000

i have a client requirement to compress data row or page
I am not sure What can i compressthe data or row
what can i do for banking domain application???????

By: Kritika

Kritika — Thu, 13 Dec 2012 10:42:56 +0000

Thanks it helped clarifying the concept.

By: Daniel Peter

Daniel Peter — Wed, 09 May 2012 12:53:25 +0000

Hi Pinal,

We are doing ETL of several datasources into SQL Server. We do not have much space to accomodate data which comes into target DataBase. Which of these two compression techniques can be applied during real time data load into the target DB? If there is any other way to compress during data loading into target Database please share with us,

Many Thanks,
Daniel

By: dhawal

dhawal — Mon, 23 Apr 2012 20:10:32 +0000

Hi Pinal,

I have a question about page compression.

1. Created table (heap) tblcompress with page compression
2. Inserted 2 million rows using INSERT INTO .. WITH (TABLOCK) SELECT FROM syntax
3. Used below to verify if the data actually was page compressed as it should have as per msdn.

SELECT
o.name, ips.index_type_desc, p.partition_number, p.data_compression_desc,
ips.page_count, ips.compressed_page_count
FROM sys.dm_db_index_physical_stats
(DB_ID(), 266288554, NULL, NULL, ‘DETAILED’) ips
JOIN sys.objects o ON o.object_id = ips.object_id
JOIN sys.partitions p ON p.object_id = o.object_id

But data doesnt seem to be page compressed? Please help

–As per Msdn:

The newly inserted row is page-compressed:
• if new row goes to an existing page with page compression
• if the new row is inserted through BULK INSERT with TABLOCK
• if the new row is inserted through INSERT INTO … (TABLOCK) SELECT … FROM
Otherwise, the row is row-compressed.*

By: SQL SERVER – Reclaiming Space Back from Database – Quiz – Puzzle – 28 of 31 « SQL Server Journey with SQL Authority

Sun, 29 Jan 2012 01:31:25 +0000

[...] SQL Server Interview Questions and Answers ISBN: 1466405643 Page#136 SHRINKDATABASE For Every Database in the SQL Server Shrinking Database is Bad – Increases Fragmentation – Reduces Performance Reclaim Space After Dropping Variable-Length Columns Using DBCC CLEANTABLE Data and Page Compressions – Data Storage and IO Improvement [...]

By: cypher

cypher — Wed, 28 Dec 2011 08:19:37 +0000

so not only it’s a bless for the storage but even for the performances am i right?

By: SQL SERVER – Effect of Compressed Backup Setting at Server Level on Database Backup « SQL Server Journey with SQLAuthority

Wed, 28 Dec 2011 01:32:13 +0000

[...] Data and Page Compressions – Data Storage and IO Improvement [...]

By: niraj

niraj — Mon, 27 Dec 2010 18:34:25 +0000

once again a great article .very helpful

By: Elamurugu

Elamurugu — Fri, 20 Aug 2010 15:52:05 +0000

Hi, it was informative and good learning to me. How these compression reacts when new data is loaded to compressed table. Does it impact the table performance or do we need to rebuild compression every time when we update.

inspired by pinal dave.(ELA)

By: jimmy

jimmy — Tue, 15 Jun 2010 21:38:10 +0000

i think null is optimized but ’0′ would still have to be stored like any other number as either int or smallint or bigint whatever the datatype is specified for the column storing ’0′

By: jimmy

jimmy — Tue, 15 Jun 2010 21:35:35 +0000

also in developer edition

By: Jignesh Rajgor

Jignesh Rajgor — Mon, 03 May 2010 18:38:46 +0000

Hi Pinal,

Love your site and straight forward info– without unnecessary bells & whistles.

DB compression is great…The question –is how to reclaim Space subsequent to DB compression.

MS article — advise not to use SHRINK file/database – but at times that’s the only option. Would you please advise best course to reclaim space after Compression using DBCC Shrink Database (without causing too much fragmentation)

Thanks in advance,

By: Satheesh Kumar

Satheesh Kumar — Thu, 18 Mar 2010 10:43:05 +0000

Hi Pinal Dave,

Any updates for the above?

By: Satheesh Kumar

Satheesh Kumar — Thu, 11 Mar 2010 12:04:25 +0000

It is very informative one. Is this advisable to set it up in the SharePoint tables?

By: Ron Porter

Ron Porter — Mon, 08 Mar 2010 20:01:24 +0000

The optimisation of NULL and 0 to no bytes sounds like a potential problem. What happens if I have a numeric field where NULL is allowed as a valid entry (i.e. bank balance is unknown) and where 0 is also a valid entry (back balance is 0)? If both truly are stored exactly the same way with no other disambiguation, then some of the data will be incorrect.

By: Pinal Dave

Pinal Dave — Sat, 06 Mar 2010 11:15:51 +0000

Yes, comprassion can improve performance because reduced IO proportionally improves the performance.

Regards,
Pinal Dave

By: newbie

newbie — Fri, 05 Mar 2010 13:36:02 +0000

Good article. I have a question, that either this will be beneficial in-term of storage or IO during query too. Like when we will submit query, is there any performance benefits?

By: Emmanuel

Emmanuel — Tue, 02 Mar 2010 22:48:26 +0000

Hi Pinal, I use data compression at page level on my 4 majors tables. I don’t have problems with CPU performance and I reduced almost 20% of the size of that tables.

By: Carlos

Carlos — Mon, 01 Mar 2010 19:30:29 +0000

Only SQL Server Enterprise Edition supports compression.

By: Ramdas

Ramdas — Mon, 01 Mar 2010 14:31:03 +0000

Hi Pinal,
I have used data compression at row level on a reporting database which i use for SSRS reporting. The good thing was that it did not create any performance issues by using the row compression. The database is not huge either it is only around 5GB. There were space savings at the table level.

By: Funk

Funk — Mon, 01 Mar 2010 13:35:48 +0000

Hi Pinal Dave,

Thanks for yet another good technical overview, from your experience what sort of additional CPU load do you see once enabling compression?