Re: [PERFORM] autovacuum suggestions for 500,000,000+ row tables?

2005-06-21 Thread Steinar H. Gunderson
On Tue, Jun 21, 2005 at 11:08:43PM +0100, Alex Stapleton wrote: > Bloody Debian stable. I might have to experiment with building from > source or using alien on debian to convert the rpms. Fun. Oh well. Or just pull in postgresql-8.0 from unstable; sid is close enough to sarge for it to work qui

Re: [PERFORM] autovacuum suggestions for 500,000,000+ row tables?

2005-06-21 Thread Alex Stapleton
On 21 Jun 2005, at 18:13, Josh Berkus wrote: Alex, Downtime is something I'd rather avoid if possible. Do you think we will need to run VACUUM FULL occasionally? I'd rather not lock tables up unless I cant avoid it. We can probably squeeze an automated vacuum tied to our data inserters every

Re: [PERFORM] autovacuum suggestions for 500,000,000+ row tables?

2005-06-21 Thread Josh Berkus
Alex, > Downtime is something I'd rather avoid if possible. Do you think we > will need to run VACUUM FULL occasionally? I'd rather not lock tables > up unless I cant avoid it. We can probably squeeze an automated > vacuum tied to our data inserters every now and then though. As long as your upda

Re: [PERFORM] autovacuum suggestions for 500,000,000+ row tables?

2005-06-21 Thread Alex Stapleton
On 20 Jun 2005, at 18:46, Josh Berkus wrote: Alex, Hi, i'm trying to optimise our autovacuum configuration so that it vacuums / analyzes some of our larger tables better. It has been set to the default settings for quite some time. We never delete anything (well not often, and not much) f

Re: [PERFORM] autovacuum suggestions for 500,000,000+ row tables?

2005-06-20 Thread Josh Berkus
Alex, > Hi, i'm trying to optimise our autovacuum configuration so that it > vacuums / analyzes some of our larger tables better. It has been set > to the default settings for quite some time. We never delete > anything (well not often, and not much) from the tables, so I am not > so worried abou

Re: [PERFORM] autovacuum suggestions for 500,000,000+ row tables?

2005-06-20 Thread John Arbash Meinel
Alex Stapleton wrote: > > On 20 Jun 2005, at 15:59, Jacques Caron wrote: > ... >> ANALYZE is not a very expensive operation, however VACUUM can >> definitely be a big strain and take a long time on big tables, >> depending on your setup. I've found that partitioning tables (at the >> applica

Re: [PERFORM] autovacuum suggestions for 500,000,000+ row tables?

2005-06-20 Thread Alex Stapleton
On 20 Jun 2005, at 15:59, Jacques Caron wrote: Hi, At 16:44 20/06/2005, Alex Stapleton wrote: We never delete anything (well not often, and not much) from the tables, so I am not so worried about the VACUUM status DELETEs are not the only reason you might need to VACUUM. UPDATEs are im

Re: [PERFORM] autovacuum suggestions for 500,000,000+ row

2005-06-20 Thread Jacques Caron
Hi, At 16:44 20/06/2005, Alex Stapleton wrote: We never delete anything (well not often, and not much) from the tables, so I am not so worried about the VACUUM status DELETEs are not the only reason you might need to VACUUM. UPDATEs are important as well, if not more. Tables that are constan

[PERFORM] autovacuum suggestions for 500,000,000+ row tables?

2005-06-20 Thread Alex Stapleton
Hi, i'm trying to optimise our autovacuum configuration so that it vacuums / analyzes some of our larger tables better. It has been set to the default settings for quite some time. We never delete anything (well not often, and not much) from the tables, so I am not so worried about the VAC