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* How to speed up the database query?
@ 2005-10-27 07:03 Abdul Wahab Dahalan <wahab@mimos.my>
0 siblings, 4 replies; 6+ messages in thread
From: Abdul Wahab Dahalan @ 2005-10-27 07:03 UTC (permalink / raw)
To: pgsql-sql
Hi everyone!
I'm looking for solution to speed up the database query, means that to get resultset as quicker as we can.
For example if I've 700 records in the table it will take longer time compared if I've only 20 records. How do we speed up the query?. Any query technique that can be applied?.
Thus wild card query like : select * from tableA will cause query time increased compare to say select a,b from tableA.
any help, prettymuch appreciated.
^ permalink raw reply [nested|flat] 6+ messages in thread
* Re: How to speed up the database query?
@ 2005-10-27 07:38 Amit_Wadhwa@Dell.com
0 siblings, 0 replies; 6+ messages in thread
From: Amit_Wadhwa@Dell.com @ 2005-10-27 07:38 UTC (permalink / raw)
To: wahab@mimos.my; pgsql-sql
Run an analyse on your query, create your indexes according to that, and
you have a better performing query.
Getting a resultset display faster will depend on your driver/RAM/client
-----Original Message-----
From: pgsql-sql-owner@postgresql.org
[mailto:pgsql-sql-owner@postgresql.org] On Behalf Of Abdul Wahab Dahalan
Sent: Thursday, October 27, 2005 12:34 PM
To: pgsql-sql@postgresql.org
Subject: [SQL] How to speed up the database query?
Hi everyone!
I'm looking for solution to speed up the database query, means that to
get resultset as quicker as we can.
For example if I've 700 records in the table it will take longer time
compared if I've only 20 records. How do we speed up the query?. Any
query technique that can be applied?.
Thus wild card query like : select * from tableA will cause query time
increased compare to say select a,b from tableA.
any help, prettymuch appreciated.
---------------------------(end of broadcast)---------------------------
TIP 5: don't forget to increase your free space map settings
^ permalink raw reply [nested|flat] 6+ messages in thread
* Re: How to speed up the database query?
@ 2005-10-27 07:44 Andreas Kretschmer <akretschmer@spamfence.net>
parent: Abdul Wahab Dahalan <wahab@mimos.my>
3 siblings, 0 replies; 6+ messages in thread
From: Andreas Kretschmer @ 2005-10-27 07:44 UTC (permalink / raw)
To: pgsql-sql
Abdul Wahab Dahalan <wahab@mimos.my> schrieb:
> Hi everyone!
>
> I'm looking for solution to speed up the database query, means that to
> get resultset as quicker as we can.
09:41 < akretschmer> ??tuning
09:41 < rtfm_please> For information about tuning
09:41 < rtfm_please> see http://www.powerpostgresql.com
09:41 < rtfm_please> or http://www.powerpostgresql.com/PerfList
09:41 < rtfm_please> or http://www.varlena.com/varlena/GeneralBits/116.php
>
> For example if I've 700 records in the table it will take longer time
> compared if I've only 20 records. How do we speed up the query?. Any
> query technique that can be applied?.
Read the links above. You should use Indexe for searching. And you
should use 'explain select ...' to see how the planer works.
09:43 < akretschmer> ??explain
09:43 < rtfm_please> For information about explain
09:43 < rtfm_please> see http://techdocs.postgresql.org/oscon2005/robert.treat/OSCON_Explaining_Explain_Public.sxi
09:43 < rtfm_please> or http://www.gtsm.com/oscon2003/toc.html
09:43 < rtfm_please> or http://www.postgresql.org/docs/current/static/sql-explain.html
Regards, Andreas
--
Really, I'm not out to destroy Microsoft. That will just be a completely
unintentional side effect. (Linus Torvalds)
Kaufbach, Saxony, Germany, Europe. N 51.05082°, E 13.56889°
^ permalink raw reply [nested|flat] 6+ messages in thread
* Re: How to speed up the database query?
@ 2005-10-27 15:45 Christian Paul B. Cosinas <cpc@cybees.com>
parent: Abdul Wahab Dahalan <wahab@mimos.my>
3 siblings, 0 replies; 6+ messages in thread
From: Christian Paul B. Cosinas @ 2005-10-27 15:45 UTC (permalink / raw)
To: 'Abdul Wahab Dahalan' <wahab@mimos.my>; pgsql-sql
Of course as long as your table increases its records, the longer will take
your query.
I think what you want is to minimize the run time even though you have large
tables. You should fine tune your database server (which I am still looking
for the best configuration for my server haha). And get the most logical
queries. Avoid unnecessary queries.
-----Original Message-----
From: pgsql-sql-owner@postgresql.org [mailto:pgsql-sql-owner@postgresql.org]
On Behalf Of Abdul Wahab Dahalan
Sent: Thursday, October 27, 2005 7:04 AM
To: pgsql-sql@postgresql.org
Subject: [SQL] How to speed up the database query?
Hi everyone!
I'm looking for solution to speed up the database query, means that to get
resultset as quicker as we can.
For example if I've 700 records in the table it will take longer time
compared if I've only 20 records. How do we speed up the query?. Any query
technique that can be applied?.
Thus wild card query like : select * from tableA will cause query time
increased compare to say select a,b from tableA.
any help, prettymuch appreciated.
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^ permalink raw reply [nested|flat] 6+ messages in thread
* Re: How to speed up the database query?
@ 2005-10-27 16:31 Bruno Wolff III <bruno@wolff.to>
parent: Abdul Wahab Dahalan <wahab@mimos.my>
3 siblings, 0 replies; 6+ messages in thread
From: Bruno Wolff III @ 2005-10-27 16:31 UTC (permalink / raw)
To: Abdul Wahab Dahalan <wahab@mimos.my>; +Cc: pgsql-sql
On Thu, Oct 27, 2005 at 15:03:36 +0800,
Abdul Wahab Dahalan <wahab@mimos.my> wrote:
> Hi everyone!
>
> I'm looking for solution to speed up the database query, means that to get resultset as quicker as we can.
>
> For example if I've 700 records in the table it will take longer time compared if I've only 20 records. How do we speed up the query?. Any query technique that can be applied?.
>
> Thus wild card query like : select * from tableA will cause query time increased compare to say select a,b from tableA.
>
> any help, prettymuch appreciated.
Why don't you run explain analyze on the real query you are trying to speed up
and show us the output along with the query and relevant table and view
definitions.
Yes, specifying fewer columns will probably significantly speed things up,
as you will be transmitting less data over the network. There aren't magic
ways to speed up queries return every row in a table.
^ permalink raw reply [nested|flat] 6+ messages in thread
* Re: How to speed up the database query?
@ 2005-10-27 17:46 Jim C. Nasby <jnasby@pervasive.com>
parent: Abdul Wahab Dahalan <wahab@mimos.my>
3 siblings, 0 replies; 6+ messages in thread
From: Jim C. Nasby @ 2005-10-27 17:46 UTC (permalink / raw)
To: Abdul Wahab Dahalan <wahab@mimos.my>; +Cc: pgsql-sql
Have you taken a look at
http://www.postgresql.org/docs/8.0/interactive/performance-tips.html ?
On Thu, Oct 27, 2005 at 03:03:36PM +0800, Abdul Wahab Dahalan wrote:
> Hi everyone!
>
> I'm looking for solution to speed up the database query, means that to get resultset as quicker as we can.
>
> For example if I've 700 records in the table it will take longer time compared if I've only 20 records. How do we speed up the query?. Any query technique that can be applied?.
>
> Thus wild card query like : select * from tableA will cause query time increased compare to say select a,b from tableA.
>
> any help, prettymuch appreciated.
>
>
> ---------------------------(end of broadcast)---------------------------
> TIP 5: don't forget to increase your free space map settings
>
--
Jim C. Nasby, Sr. Engineering Consultant jnasby@pervasive.com
Pervasive Software http://pervasive.com work: 512-231-6117
vcard: http://jim.nasby.net/pervasive.vcf cell: 512-569-9461
^ permalink raw reply [nested|flat] 6+ messages in thread
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-- links below jump to the message on this page --
2005-10-27 07:03 How to speed up the database query? Abdul Wahab Dahalan <wahab@mimos.my>
2005-10-27 07:44 ` Andreas Kretschmer <akretschmer@spamfence.net>
2005-10-27 15:45 ` Christian Paul B. Cosinas <cpc@cybees.com>
2005-10-27 16:31 ` Bruno Wolff III <bruno@wolff.to>
2005-10-27 17:46 ` Jim C. Nasby <jnasby@pervasive.com>
2005-10-27 07:38 Re: How to speed up the database query? Amit_Wadhwa@Dell.com
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