Click here to monitor SSC
SQLServerCentral is supported by Redgate
 
Log in  ::  Register  ::  Not logged in
 
 
 


Cost threshold for parallelism


Cost threshold for parallelism

Author
Message
SQLSACT
SQLSACT
UDP Broadcaster
UDP Broadcaster (1.5K reputation)UDP Broadcaster (1.5K reputation)UDP Broadcaster (1.5K reputation)UDP Broadcaster (1.5K reputation)UDP Broadcaster (1.5K reputation)UDP Broadcaster (1.5K reputation)UDP Broadcaster (1.5K reputation)UDP Broadcaster (1.5K reputation)

Group: General Forum Members
Points: 1456 Visits: 2931
Hi all

When dealing with the Cost threshold for parallelism, I am almost certain that the Cost is not an amount in seconds but rather a number that SQL Server internally uses.

Is this correct?

I'm asking because I am going through a well-known book and it says: The "cost" is the estimated amount of time in seconds that it would take to execute

Is my understanding wrong?

Thanks
s_osborne2
s_osborne2
Right there with Babe
Right there with Babe (745 reputation)Right there with Babe (745 reputation)Right there with Babe (745 reputation)Right there with Babe (745 reputation)Right there with Babe (745 reputation)Right there with Babe (745 reputation)Right there with Babe (745 reputation)Right there with Babe (745 reputation)

Group: General Forum Members
Points: 745 Visits: 2292
Hi,

I'm also of the understanding that "cost" is just an arbitrary no.

This link seems to back that up.

Thanks,

Simon



MCSE: Data Platform
MCSE: Business Intelligence
Follow me on Twitter: @WazzTheBadger
LinkedIn Profile: Simon Osborne
anthony.green
anthony.green
SSCertifiable
SSCertifiable (6.1K reputation)SSCertifiable (6.1K reputation)SSCertifiable (6.1K reputation)SSCertifiable (6.1K reputation)SSCertifiable (6.1K reputation)SSCertifiable (6.1K reputation)SSCertifiable (6.1K reputation)SSCertifiable (6.1K reputation)

Group: General Forum Members
Points: 6091 Visits: 6069
From MSDN


The cost refers to an estimated elapsed time in seconds required to run the serial plan on a specific hardware configuration


http://msdn.microsoft.com/en-us/library/ms188603(v=SQL.105).aspx



Want an answer fast? Try here
How to post data/code for the best help - Jeff Moden
When a question, really isn't a question - Jeff Smith
Need a string splitter, try this - Jeff Moden
How to post performance problems - Gail Shaw
CrossTabs-Part1 & Part2 - Jeff Moden
SQL Server Backup, Integrity Check, and Index and Statistics Maintenance - Ola Hallengren
Managing Transaction Logs - Gail Shaw
Troubleshooting SQL Server: A Guide for the Accidental DBA - Jonathan Kehayias and Ted Krueger


SQLSACT
SQLSACT
UDP Broadcaster
UDP Broadcaster (1.5K reputation)UDP Broadcaster (1.5K reputation)UDP Broadcaster (1.5K reputation)UDP Broadcaster (1.5K reputation)UDP Broadcaster (1.5K reputation)UDP Broadcaster (1.5K reputation)UDP Broadcaster (1.5K reputation)UDP Broadcaster (1.5K reputation)

Group: General Forum Members
Points: 1456 Visits: 2931
anthony.green (11/27/2012)
From MSDN


The cost refers to an estimated elapsed time in seconds required to run the serial plan on a specific hardware configuration


http://msdn.microsoft.com/en-us/library/ms188603(v=SQL.105).aspx


From SSC
http://www.sqlservercentral.com/Forums/Topic1287679-146-1.aspx#bm1287938
anthony.green
anthony.green
SSCertifiable
SSCertifiable (6.1K reputation)SSCertifiable (6.1K reputation)SSCertifiable (6.1K reputation)SSCertifiable (6.1K reputation)SSCertifiable (6.1K reputation)SSCertifiable (6.1K reputation)SSCertifiable (6.1K reputation)SSCertifiable (6.1K reputation)

Group: General Forum Members
Points: 6091 Visits: 6069
I stand corrected.



Want an answer fast? Try here
How to post data/code for the best help - Jeff Moden
When a question, really isn't a question - Jeff Smith
Need a string splitter, try this - Jeff Moden
How to post performance problems - Gail Shaw
CrossTabs-Part1 & Part2 - Jeff Moden
SQL Server Backup, Integrity Check, and Index and Statistics Maintenance - Ola Hallengren
Managing Transaction Logs - Gail Shaw
Troubleshooting SQL Server: A Guide for the Accidental DBA - Jonathan Kehayias and Ted Krueger


SQLSACT
SQLSACT
UDP Broadcaster
UDP Broadcaster (1.5K reputation)UDP Broadcaster (1.5K reputation)UDP Broadcaster (1.5K reputation)UDP Broadcaster (1.5K reputation)UDP Broadcaster (1.5K reputation)UDP Broadcaster (1.5K reputation)UDP Broadcaster (1.5K reputation)UDP Broadcaster (1.5K reputation)

Group: General Forum Members
Points: 1456 Visits: 2931
anthony.green (11/27/2012)
I stand corrected.


Can I assume that my documentation is incorrect then?
anthony.green
anthony.green
SSCertifiable
SSCertifiable (6.1K reputation)SSCertifiable (6.1K reputation)SSCertifiable (6.1K reputation)SSCertifiable (6.1K reputation)SSCertifiable (6.1K reputation)SSCertifiable (6.1K reputation)SSCertifiable (6.1K reputation)SSCertifiable (6.1K reputation)

Group: General Forum Members
Points: 6091 Visits: 6069
Yes I would as Gail has mentioned that the documentation on MSDN is incorrect, so anything which says its in seconds is incorrect.



Want an answer fast? Try here
How to post data/code for the best help - Jeff Moden
When a question, really isn't a question - Jeff Smith
Need a string splitter, try this - Jeff Moden
How to post performance problems - Gail Shaw
CrossTabs-Part1 & Part2 - Jeff Moden
SQL Server Backup, Integrity Check, and Index and Statistics Maintenance - Ola Hallengren
Managing Transaction Logs - Gail Shaw
Troubleshooting SQL Server: A Guide for the Accidental DBA - Jonathan Kehayias and Ted Krueger


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