Re: Slowly Queries

On 12/14/06, Anton P. Linevich <lists-pgsql-admin(at)chexov(dot)kiev(dot)ua> wrote:
> Hi guys. Can you give me a describe what should i do when get a lot of
> slowly queries?
> Last week i saw such INFO messages in postgres log:

we too faced the same problem wherin a table was updated very frequently
and with time it used to loose performance. vaccuuming the table
was not very effective.

we changed the application to insert to a seperate table whenever a banner
was viewed instead of updating view count in the banner master table. this
was very fast. but this adds to complexity.

some expert will hopefully tell the proper solution to it.

regds
mallah.

>
> LOG: duration: 8144.361 ms statement: update videos set
> watched=watched+1, last_view_date='1166057431' where id='106980'
> LOG: duration: 7825.637 ms statement: update videos set
> watched=watched+1, last_view_date='1166057431' where id='99337'
> LOG: duration: 7023.592 ms statement: insert into
> statistics_search(date,search,type,id_member) VALUES
> ('1166057432','sexy','V','0')
> LOG: duration: 6603.307 ms statement: insert into
> statistics_search(date,search,type,id_member) VALUES ('1166057432','Fun
> Day','V','0')
> LOG: duration: 6093.724 ms statement: insert into
> statistics_search(date,search,type,id_member) VALUES
> ('1166057433','party','V','0')
> LOG: duration: 5855.535 ms statement: update videos set
> watched=watched+1, last_view_date='1166057433' where id='102462'
> LOG: duration: 5464.827 ms statement: update videos set
> watched=watched+1, last_view_date='1166057433' where id='103901'
> LOG: duration: 8917.981 ms statement: update users_auth set
> date_last='1166057430' where id='384891'
> LOG: duration: 7584.912 ms statement: update videos set
> watched=watched+1, last_view_date='1166057431' where id='103164'
> LOG: duration: 5181.864 ms statement: update videos set
> watched=watched+1, last_view_date='1166057434' where id='112060'
> LOG: duration: 38394.879 ms statement: update upload_synchronizer set
> lock_status='N' where sess_id='103503'
>
> How i can tune database for quick updates?
> I have SATA RAID1.
>
> Thank you all for your answers.
>
> --
> Anton P. Linevich
>
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