Re: Vacuum full

Thanks Justin,

These tables will be used for reporting only, No update or insert activity
at all.

Q1.

Once a day

All application table indexes are dropped.

A vacuum full analyse is executed.

Then all app table indexes are created.

Q2.

We are running. PostgreSQL 7.2.1 on i686-pc-linux-gnu, compiled by GCC
2.95.4

I know we are several versions behind. Is there a known bug list for this
version?

I am also aware there is an upper limit on the number of transactions
postgres can do before the DB needs vacuuming. Somthing to do with tran ids
wrapping or something. Do you know anything about this?

Thanks

Andrew

----- Original Message -----
From: "Justin Clift" <justin(at)postgresql(dot)org>
To: "Andrew Bartley" <abartley(at)evolvosystems(dot)com>
Cc: <pgsql-general(at)postgresql(dot)org>
Sent: Wednesday, November 06, 2002 1:02 PM
Subject: Re: [GENERAL] Vacuum full

> Hi Andrew,
>
> How much activity do you have on these archive type of tables? If you
> run SELECT queries on them a lot, and you're often updating or deleting
> rows (am specifically not meaning INSERTing new rows) then it might be
> worthwhile VACUUMing them.
>
> Otherwise, it looks like you might not gain much from doing so. :)
>
> As a curiosity question, when you VACUUM, do you use the ANALYZE option?
>
> As a second curiosity question, when you mention PostgreSQL 7.2, do you
> mean 7.2 literally or 7.2.3? 7.2.3 is the recommended production
> version due to bugs having been found in 7.2.2 and 7.2.1.
>
> Hope that helps.
>
> :-)
>
> Regards and best wishes,
>
> Justin Clift
>
>
> Andrew Bartley wrote:
> >
> > We are using postgres 7.2
>
>
>
> Can anyone tell me what the ramifications are if I do not vacuum full
> the whole DB?
>
>
>
> Say if I was to selectively vacuum all of the PG tables, and only some
> of the Application tables.
>
>
>
> We have a number of tables that are effectively archive type tables.
> They are large, but do not change. If
>
> I was to vacuum these tables on a regular basis, it would add a
> significant portion of time to the housekeeping process.
>
>
>
> Thanks
>
> Andrew
>
> --
> "My grandfather once told me that there are two kinds of people: those
> who work and those who take the credit. He told me to try to be in the
> first group; there was less competition there."
> - Indira Gandhi
>
>