Re: Postgres 9 : - How to interpret the EXPLAIN query results

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



Hi,
everything you need to know is available on the documentation at http://www.postgresql.org/docs/current/static/sql-explain.html.

"COSTS

Include information on the estimated startup and total cost of each plan node, as well as the estimated number of rows and the estimated width of each row. This parameter defaults to TRUE."

Best regards,
Anthony

On Wed, Mar 25, 2015 at 9:00 AM, Khangelani Gama <kgama@xxxxxxxxxxxx> wrote:

Hi

 

Please help, how can I interpret the following results of my EXPLAIN query ?, I can see that the query will through 18586018 rows, but what’s the meaning of cost and width?

 

GroupAggregate  (cost=762381141.96..768375132.77 rows=18586018 width=32)

 

 

 

 

CONFIDENTIALITY NOTICE
The contents of and attachments to this e-mail are intended for the addressee only, and may contain the confidential
information of Argility (Proprietary) Limited and/or its subsidiaries. Any review, use or dissemination thereof by anyone
other than the intended addressee is prohibited.If you are not the intended addressee please notify the writer immediately
and destroy the e-mail. Argility (Proprietary) Limited and its subsidiaries distance themselves from and accept no liability
for unauthorised use of their e-mail facilities or e-mails sent other than strictly for business purposes.



[Index of Archives]     [KVM ARM]     [KVM ia64]     [KVM ppc]     [Virtualization Tools]     [Spice Development]     [Libvirt]     [Libvirt Users]     [Linux USB Devel]     [Linux Audio Users]     [Yosemite Questions]     [Linux Kernel]     [Linux SCSI]     [XFree86]

  Powered by Linux