Re: Postgres slow after a couple of days

Hi.

> A few days ago i've installed PostgreSQL 7.4.1
> After the installation, Postgres was very fast.
> But now, a few days later, it getting slower and slower.

1. Is the database designed well? For example: did you create indices
on fields used as search keys, ecc...

2. Do you vacuum you database once in a while? look for "vacuum
in the manual"...

> I've looked in the data-dir and i was confused when i see the big
> size from that directory.
>
> A dump (created with pg_dump) is about 1MB.
>
> pauli# cd /usr/local/pgsql/data
> epauli# du -h
> 4.4M ./base/1

the template database is about 4MB

> 4.4M ./base/17141
> 19M ./base/17142

this is your database
i'll be more than 1 MB due to: not reclaimed free space (vacuum!), index
lookup tables, various overhead, ...

> 4.4M ./base/17143
> 4.4M ./base/17149
> 4.4M ./base/17158
> 4.5M ./base/29156
> 4.4M ./base/29175
> 4.5M ./base/29184

there are a few empty or almost empty databases;
see what they are with psql -l

> 55M ./base
> 160K ./global

> 32M ./pg_xlog
> 98K ./pg_clog

the transaction log files - always there after first use;
don't touch them, you'll need them!

Bye, Chris.

> 87M .
>
>
> Does anybody know why this directory is 87MB while the database is
> 1MB?
>