Re: [PERFORM] Query runs 38 seconds for small database!

2006-05-08 Thread Alvaro Herrera
Tom Lane wrote: > Jan de Visser <[EMAIL PROTECTED]> writes: > > On Monday 08 May 2006 14:10, Andrus wrote: > >> I created empty table konto and loaded more that 219 records to it during > >> database creation. > >> So it seems that if table grows from zero to more than 219 times larger > >> then it

Re: [PERFORM] Query runs 38 seconds for small database!

2006-05-08 Thread Tom Lane
Jan de Visser <[EMAIL PROTECTED]> writes: > On Monday 08 May 2006 14:10, Andrus wrote: >> I created empty table konto and loaded more that 219 records to it during >> database creation. >> So it seems that if table grows from zero to more than 219 times larger >> then it was still not processed. >

Re: [PERFORM] Query runs 38 seconds for small database!

2006-05-08 Thread Jan de Visser
On Monday 08 May 2006 14:10, Andrus wrote: > > The only reason for being so conservative that I'm aware of was that it > > was a best guess. Everyone I've talked to cuts the defaults down by at > > least a factor of 2, sometimes even more. > > Can we ask that Tom will change default values to 2 tim

Re: [PERFORM] Query runs 38 seconds for small database!

2006-05-08 Thread Andrus
> The only reason for being so conservative that I'm aware of was that it > was a best guess. Everyone I've talked to cuts the defaults down by at > least a factor of 2, sometimes even more. Can we ask that Tom will change default values to 2 times smaller in 8.1.4 ? > BTW, these parameters are a

Re: [PERFORM] Query runs 38 seconds for small database!

2006-05-08 Thread Jim C. Nasby
On Mon, May 08, 2006 at 08:36:42PM +0300, Andrus wrote: > > BTW, you might want to cut all the autovac thresholds in half; that's > > what I typically do. > > I added ANALYZE command to my procedure which creates and loads data to > postgres database > from other DBMS. This runs only onvce after

Re: [PERFORM] Query runs 38 seconds for small database!

2006-05-08 Thread Andrus
> BTW, you might want to cut all the autovac thresholds in half; that's > what I typically do. I added ANALYZE command to my procedure which creates and loads data to postgres database from other DBMS. This runs only onvce after installing my application. I hope this is sufficient. If default t

Re: [PERFORM] Query runs 38 seconds for small database!

2006-05-08 Thread Jim C. Nasby
On Mon, May 08, 2006 at 08:03:38PM +0300, Andrus wrote: > > The default autovac thresholds are not very aggressive; this table was > > probably not large enough to get selected for analysis. > > Tom, > > thank you. > Excellent. BTW, you might want to cut all the autovac thresholds in half; that'

Re: [PERFORM] Query runs 38 seconds for small database!

2006-05-08 Thread Andrus
> The default autovac thresholds are not very aggressive; this table was > probably not large enough to get selected for analysis. Tom, thank you. Excellent. Andrus. ---(end of broadcast)--- TIP 5: don't forget to increase your free space map se

Re: [PERFORM] Query runs 38 seconds for small database!

2006-05-08 Thread Tom Lane
"Andrus" <[EMAIL PROTECTED]> writes: > I see autovacuum: processing database "mydb" messages in log file and I have > stats_start_collector = on > stats_row_level = on > in config file. Why statistics was out-of-date ? The default autovac thresholds are not very aggressive; this table was probably

Re: [PERFORM] Query runs 38 seconds for small database!

2006-05-08 Thread Andrus
>> "-> Seq Scan on konto dbkonto (cost=0.00..23.30 >> rows=1 >> width=44) (actual time=0.017..1.390 rows=219 loops=1)" >> " Filter: (iseloom = 'A'::bpchar)" > > Anytime you see a row estimate that far off about a simple single-column > condition, it m

Re: [PERFORM] Query runs 38 seconds for small database!

2006-05-08 Thread Tom Lane
"Andrus" <[EMAIL PROTECTED]> writes: > I have small database. However the following query takes 38 (!) seconds to > run. > How to speed it up (preferably not changing table structures but possibly > creating indexes) ? ANALYZE would probably help. > "-> Seq Scan on konto dbko

[PERFORM] Query runs 38 seconds for small database!

2006-05-08 Thread Andrus
I have small database. However the following query takes 38 (!) seconds to run. How to speed it up (preferably not changing table structures but possibly creating indexes) ? Andrus. set search_path to public,firma1; explain analyze select bilkaib.summa from BILKAIB join KONTO CRKONTO ON bilkaib.