| From: | Valentina Tedone <valetedo88(at)gmail(dot)com> |
|---|---|
| To: | pgsql-admin(at)postgresql(dot)org |
| Subject: | tuning my db |
| Date: | 2015-02-16 15:27:40 |
| Message-ID: | CAFgLY6zZc=r98MhtvQovattixqaRAcMrT-4KqNXSsGPG0KrYYA@mail.gmail.com |
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| Lists: | pgsql-admin |
Hi!
I am new to Postgresql.
I want to tune my Postgresql config, I used pgtune (
http://pgtune.leopard.in.ua/) to set my parameters, is it the best way to
set them?
I want to improve the database performance (time) choosing the best
configuration for my db.
The parameters of my system are: Ubuntu LTS 12.04 and 3635 MB of RAM.
And then : why does "ORDER BY" increase the query execution time ?
I have 3 dbs, the first one is 108 MB, the second one is 1200 MB and the
last one is 11 GB, why in the first two dbs to solve a query does it use
the bitmap heap scan, instead in the last one it uses the seq scan?
Thank you
Valentina
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