Re: [PERFORM] encourging bitmap AND

2011-01-02 Thread Jim Nasby
On Dec 26, 2010, at 11:24 AM, Tom Lane wrote: > If you're doing interval queries enough to worry about having an index > for them, you really want an indexing structure that is designed to do > interval queries efficiently. BTW, one way to accomplish that is to transform your data into geometric s

Re: [PERFORM] CPU bound

2011-01-02 Thread Jim Nasby
On Dec 20, 2010, at 12:47 AM, Mladen Gogala wrote: > Good time accounting is the most compelling reason for having a wait event > interface, like Oracle. Without the wait event interface, one cannot really > tell where the time is spent, at least not without profiling the database > code, which

Re: [PERFORM] How to turn autovacuum prevent wrap around run faster?

2011-01-02 Thread marc.hsiao
Hi Scot Marlowe: > Set an autovacuum max cost much higher than the vacuum max cost > (10 or so) and drop autovac cost delay to 0, then restart > autovacuum. I had set " autovacuum_vacuum_cost_delay=0". BTW, how to set " autovacuum max cost" ? Regards Marc -Original Message- From: