Re: [PERFORM] Index Performance Help

2004-04-01 Thread Greg Stark
"Damien Dougan" <[EMAIL PROTECTED]> writes: > Sample analyze output for an initial query: > > hydradb=# explain analyze select * from pvsubscriber where actorid = > 'b3432-asdas-232-Subscriber793500'; I take it pvsubscriber is a view? What's the definition of your view? > -> Index Scan using

Re: [PERFORM] Index Performance Help

2004-02-05 Thread Josh Berkus
Damian, Also, if there have been a lot of updates to the table, you may need to run a REINDEX on it. An attenuated index would be slow to load because of the nummber of empty disk blocks. -- -Josh Berkus Aglio Database Solutions San Francisco ---(end of broadcast

Re: [PERFORM] Index Performance Help

2004-02-05 Thread Damien Dougan
Thanks Richard. It certainly does appear to be memory related (on a smaller data set of 250K subscribers, all accesses are < 1ms). We're going to play with increasing RAM on the machine, and applying the optimisation levels on the page you recommended. (We're also running on a hardware RAID con

Re: [PERFORM] Index Performance Help

2004-02-05 Thread Richard Huxton
On Thursday 05 February 2004 12:13, Damien Dougan wrote: > Hi All, > > I've been seeing very slow read performance on a database of 1 million > indexed subscribers, which I believe is nothing to do with the data > itself, but delays on processing the index. > > If I make a random jump into the inde