Re: [PERFORM] PostgreSQL Parallel Processing !

2012-01-25 Thread Claudio Freire
On Wed, Jan 25, 2012 at 5:16 PM, Merlin Moncure wrote: > On Wed, Jan 25, 2012 at 7:43 AM, Claudio Freire > wrote: >> I know squat about how to implement this, but I've been considering >> picking the low hanging fruit on that tree and patching up PG to try >> the concept. Many of the items above

Re: [PERFORM] PostgreSQL Parallel Processing !

2012-01-25 Thread Merlin Moncure
On Wed, Jan 25, 2012 at 7:43 AM, Claudio Freire wrote: > I know squat about how to implement this, but I've been considering > picking the low hanging fruit on that tree and patching up PG to try > the concept. Many of the items above would require a thread-safe > execution engine, which may be qu

Re: [PERFORM] Can lots of small writes badly hamper reads from other tables?

2012-01-25 Thread Jeff Janes
On Tue, Jan 24, 2012 at 12:16 PM, Dave Crooke wrote: > Hi folks > > This could be a sheer volume issue, but I though I would ask the wisdom of > this forum as to next investigative steps. To answers the question in your subject, yes. If the disk head is positioned to write in one place, it can't

Re: [PERFORM] PostgreSQL Parallel Processing !

2012-01-25 Thread sridhar bamandlapally
Yes "Hint method" is an alternative solution which does not appear to be exclusive parallelism solution as it is included in comment block and have no error handling, and this could be one of the reason against PG policy "Parameter method" ( which we are thinking about ) can be very exclusive par

Re: [PERFORM] PostgreSQL Parallel Processing !

2012-01-25 Thread Claudio Freire
On Wed, Jan 25, 2012 at 6:18 AM, sridhar bamandlapally wrote: > I just want to illustrate an idea may possible for bringing up > parallel process in PostgreSQL at SQL-Query level > > The PARALLEL option in Oracle really give great improvment in > performance, multi-thread concept has great possibi

Re: [PERFORM] PostgreSQL Parallel Processing !

2012-01-25 Thread sridhar bamandlapally
Hi Everyone I just want to illustrate an idea may possible for bringing up parallel process in PostgreSQL at SQL-Query level The PARALLEL option in Oracle really give great improvment in performance, multi-thread concept has great possibilities In Oracle we have hints ( see below ) : SELECT /*+P

Re: [PERFORM] Cursor fetch performance issue

2012-01-25 Thread Heikki Linnakangas
On 24.01.2012 23:34, Tony Capobianco wrote: Here's the explain: pg=# explain select getMemberAdminPrevious_sp(247815829, 1,'test.em...@hotmail.com', 'Email', 'Test'); QUERY PLAN -- Result (cost=0.00..0.26 rows=1 width=0) (1 row) Time: