Re: [PERFORM] Shared memory for large PostGIS operations

2012-03-18 Thread Brian Hamlin
Hi Kevin, List, others... On Mar 16, 2012, at 7:17 AM, Kevin Grittner wrote: Andy Colson wrote: I tried shared_buffers at both 2400M and 18000M, and it took 4.5 hours both times. ... (weak attempts at humor omitted) All else being the same, adjusting shared_buffers affects how much o

Re: [PERFORM] Shared memory for large PostGIS operations

2012-03-17 Thread Kevin Grittner
Andy Colson wrote: On 03/16/2012 05:30 PM, Kevin Grittner wrote: >> Ah, I didn't pick up on the attempts at humor; perhaps that's why >> you mistook something I said as an attempt at an insult. > > It wasn't you Kevin, it was me that insulted him. (Although I was > trying to be funny, and not me

Re: [PERFORM] Shared memory for large PostGIS operations

2012-03-17 Thread Andy Colson
On 03/16/2012 05:30 PM, Kevin Grittner wrote: Brian Hamlin wrote: On Mar 16, 2012, at 7:17 AM, Kevin Grittner wrote: Andy Colson wrote: I tried shared_buffers at both 2400M and 18000M, and it took 4.5 hours both times. ... (weak attempts at humor omitted) Ah, I didn't pick up on the

Re: [PERFORM] Shared memory for large PostGIS operations

2012-03-16 Thread Kevin Grittner
Brian Hamlin wrote: > On Mar 16, 2012, at 7:17 AM, Kevin Grittner wrote: >> Andy Colson wrote: >> >>> I tried shared_buffers at both 2400M and 18000M, and it took 4.5 >>> hours both times. ... (weak attempts at humor omitted) Ah, I didn't pick up on the attempts at humor; perhaps that's w

Re: [PERFORM] Shared memory for large PostGIS operations

2012-03-16 Thread Kevin Grittner
Andy Colson wrote: > I tried shared_buffers at both 2400M and 18000M, and it took 4.5 > hours both times. I dont know if I am CPU bound or IO bound, but > since giving PG more ram didnt help much, I'll assume I'm CPU > bound. All else being the same, adjusting shared_buffers affects how much

Re: [PERFORM] Shared memory for large PostGIS operations

2012-03-16 Thread Andy Colson
So let me clean that up for you: > On 3/14/2012 11:29 PM, mapl...@light42.com wrote: Hello list, my name is Brian Hamlin, but I prefer to go by darkblue, its mysterious and dangerous! I run PG 9.1, PostGIS 1.5.3, Linux 64 on Dual Xeons, OS on a single drive, and db is on 3-disk raid 5. I'

[PERFORM] Shared memory for large PostGIS operations

2012-03-16 Thread maplabs
(from #postgresql IRC on freenode) darkblue_b I did an interesting experiment the other day davidfetter_vmw .. davidfetter_vmw do tell darkblue_b well you know I do these huge monolithic postGIS queries on an otherwise idle linux machine.. and there was a persistant thought in my head that Post