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Thread: I have a question about Database management

I have a question about Database management

From
nineday
Date:
I have a trouble.
My DBMS is PostgreSQL which is accessory to Red hat 9.0.
At the initial stages, it was very quick when select ,but operated for several months , it  become to very slow ,especially in a pivotal table.
So,I exported data ,and recreate tables , finally import data, it get right .
 
I do not know why. and what is the solution to my trouble 
                    Thank you very much ~~

Re: I have a question about Database management

From
imad
Date:
You need to vacum (probably re-index) your tables
periodically to get the best performance.

These vacuming and indexing tools should already
be there with your PostgreSQL installation.

--Imad
www.EnterpriseDB.com


On 10/31/06, nineday <nine9day@gmail.com> wrote:
> I have a trouble.
> My DBMS is PostgreSQL which is accessory to Red hat 9.0.
> At the initial stages, it was very quick when select ,but operated for
> several months , it  become to very slow ,especially in a pivotal table.
> So,I exported data ,and recreate tables , finally import data, it get right
> .
>
> I do not know why. and what is the solution to my trouble
>                     Thank you very much ~~

Re: I have a question about Database management

From
"Tomeh, Husam"
Date:
Without knowing more details about what version of postgres and type of activities going on,etc, it may be hard to figure out what's going out. However, one maintenance operation that you want to make sure it happens to is to run vacuum/analyze periodically so that expired tuples can be re-used, and your statistics get updated in the db system catalog.
 
--
  Husam
 

From: pgsql-admin-owner@postgresql.org [mailto:pgsql-admin-owner@postgresql.org] On Behalf Of nineday
Sent: Tuesday, October 31, 2006 3:06 AM
To: pgsql-admin@postgresql.org
Subject: [ADMIN] I have a question about Database management

I have a trouble.
My DBMS is PostgreSQL which is accessory to Red hat 9.0.
At the initial stages, it was very quick when select ,but operated for several months , it  become to very slow ,especially in a pivotal table.
So,I exported data ,and recreate tables , finally import data, it get right .
 
I do not know why. and what is the solution to my trouble 
                    Thank you very much ~~

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Re: I have a question about Database management

From
Bruno Wolff III
Date:
On Tue, Oct 31, 2006 at 19:05:58 +0800,
  nineday <nine9day@gmail.com> wrote:
> I have a trouble.
> My DBMS is PostgreSQL which is accessory to Red hat 9.0.
> At the initial stages, it was very quick when select ,but operated for
> several months , it  become to very slow ,especially in a pivotal table.
> So,I exported data ,and recreate tables , finally import data, it get right
> .
>
> I do not know why. and what is the solution to my trouble
>                    Thank you very much ~~

You should probably also upgrade. The version of Postgres that came with
RH9 is going to be very old now. You should probably upgrade the OS as
well. While RH9 is supported by the Legacy project, they haven't exactly
been cranking out lots of fixes, so you should be very careful if that
system is exposed to attack over a network.