Re: Autovacuum / full vacuum - Mailing list pgsql-performance

From Michael Riess
Subject Re: Autovacuum / full vacuum
Date
Msg-id dqj07o$2tl4$1@news.hub.org
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In response to Re: Autovacuum / full vacuum  (Christopher Browne <cbbrowne@acm.org>)
Responses Re: Autovacuum / full vacuum
Re: Autovacuum / full vacuum
Re: Autovacuum / full vacuum
Re: Autovacuum / full vacuum
List pgsql-performance
Well,

I think that the documentation is not exactly easy to understand. I
always wondered why there are no examples for common postgresql
configurations. All I know is that the default configuration seems to be
too low for production use. And while running postgres I get no hints as
to which setting needs to be increased to improve performance. I have no
chance to see if my FSM settings are too low other than to run vacuum
full verbose in psql, pipe the result to a text file and grep for some
words to get a somewhat comprehensive idea of how much unused space
there is in my system.

Don't get me wrong - I really like PostgreSQL and it works well in my
application. But somehow I feel that it might run much better ...

about the FSM: You say that increasing the FSM is fairly cheap - how
should I know that?

>> did you read my post? In the first part I explained why I don't want
>> to increase the FSM that much.
>
> No, you didn't.  You explained *that* you thought you didn't want to
> increase the FSM.  You didn't explain why.
>
> FSM expansion comes fairly cheap  ...

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