From: | Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us> |
---|---|
To: | Dave Page <dpage(at)vale-housing(dot)co(dot)uk> |
Cc: | PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org>, Andreas Pflug <pgadmin(at)pse-consulting(dot)de> |
Subject: | Re: Server instrumentation patch |
Date: | 2005-06-24 17:46:33 |
Message-ID: | 200506241746.j5OHkXr05874@candle.pha.pa.us |
Views: | Raw Message | Whole Thread | Download mbox | Resend email |
Thread: | |
Lists: | pgsql-hackers |
Dave Page wrote:
> > The current version of the patch only moves those functions he wants.
> > Marc says he wants them all moved, and I agree.
>
> OK - did you see Andreas' response to why he hadn't done that (it was
> actually posted in response to your original query, not Marcs)? In a
> nutshell, the functions that had not been moved returned values that
> were easily derived from the other functions, and thus could be
> considered bloat?
>
> The functions included in the patch were:
>
> int8 pg_tablespace_size(oid) - Return the size of the tablespace in
> bytes
> int8 pg_database_size(oid) - Return the size of the database in
> bytes
> int8 pg_relation_size(oid) - Return the size of the relation in
> bytes
> text pg_size_pretty(int8) - Pretty-print the byte value
>
> The ones left out were:
>
> int8 database_size(name) - Return the size of the database in
> bytes (by name)
> int8 relation_size(text) - Return the size of the relation in
> bytes (by name)
> int8 indexes_size(text) - Return the size of the indexes on the
> named relation
> int8 total_relation_size(text) - Return relation_size(text) +
> indexes_size(text) + relation_size(text->toast tables)
> setof record relation_size_components(text) - return a pretty-print set
> of values from above.
>
> I don't feel particularly strongly either way, but given the normal
> desire not to bloat the backend necessarily, I have to question the need
> to include the latter functions.
OK, well, let's talk about what we want done, then someone can work up a
patch. Does someone want to make a proposal here on what to do?
> > Well, from the May, 2005 discussion URL you posted, I see a
> > clear reply
> > to the idea of adding the I/O functions to the backend:
> >
> >
> > http://archives.postgresql.org/pgsql-hackers/2005-05/msg00874.php
> >
> > Now, you can agree or disagree that there are issues with the I/O
> > functions, but the concern was raised in May, and not
> > addressed at all,
> > either via email or the patch.
>
> Maybe that's the wrong URL, but all I see there is a vague recollection
> from Tom that there were security issues. In the next message, Andreas
> recalls how you and he worked out the issues that were raised - I
> believe this is the thread
> http://archives.postgresql.org/pgsql-hackers/2004-07/msg00793.php.
> Mhonarc has made a mess of the thread so it does seem to break in a few
> places, and it is possible I've missed part.
The security issue is that we didn't want the backend to be able to
read/write outside of /pgdata, and I think we have that working, except
that I have no idea how it will handle config files outside /pgdata.
Maybe that was in the patch --- I don't know.
I think we need to see a new patch with just the i/o functions so we can
review it. I personally think the I/O functions are a good idea, but I
need to be considerate of others in the community who have concerns.
> > For the second, please supply a patch that moves _all_ of dbsize into
> > the main server. I think we have agreement on that.
>
> If that remains the case having seen my comments above echoing Andreas'
> concerns then sure, if that's what it takes to get them in, so be it.
> Please confirm either way.
Let's discuss what to move/delete/keep in contrib.
--
Bruce Momjian | http://candle.pha.pa.us
pgman(at)candle(dot)pha(dot)pa(dot)us | (610) 359-1001
+ If your life is a hard drive, | 13 Roberts Road
+ Christ can be your backup. | Newtown Square, Pennsylvania 19073
From | Date | Subject | |
---|---|---|---|
Next Message | Dave Page | 2005-06-24 18:59:31 | Re: Server instrumentation patch |
Previous Message | Bruce Momjian | 2005-06-24 17:35:49 | Re: Server instrumentation patch |