Re: [PERFORM] Advice sought : new database server

2012-03-08 Thread Shaun Thomas
On 03/08/2012 10:15 AM, Jochen Erwied wrote: Shouldn't that be: kernel.shmmax = 4294967296 kernel.shmmni = 4096 kernel.shmall = 1572864 Oops! Yes. That's definitely it. I'm too accustomed to having those set automatically, and then setting these: vm.swappiness = 0 vm.dirty_background_ratio

Re: [PERFORM] Advice sought : new database server

2012-03-08 Thread Jochen Erwied
Wednesday, March 7, 2012, 11:24:25 PM you wrote: > On 03/07/2012 03:07 PM, Craig James wrote: >> echo 4294967296 >/proc/sys/kernel/shmmax # 4 GB shared memory >> echo 4096 >/proc/sys/kernel/shmmni >> echo 1572864 >/proc/sys/kernel/shmall # 6 GB max shared mem (block size >> is 4096 bytes) > For

Re: [PERFORM] Advice sought : new database server

2012-03-08 Thread Jeff Janes
On Thu, Mar 8, 2012 at 4:43 AM, Ants Aasma wrote: > On Wed, Mar 7, 2012 at 10:18 PM, Merlin Moncure wrote: >> those numbers are stupendous for 8 drive sata.  how much shared >> buffers do you have? > > Couple of things to notice: > 1) The benchmark can run fully in memory, although not 100% in sh

Re: [PERFORM] Advice sought : new database server

2012-03-08 Thread Rory Campbell-Lange
On 08/03/12, Ants Aasma (ants.aa...@eesti.ee) wrote: > So regardless if the benchmark is a good representation of the target > workload or not, it definitely isn't benchmarking the IO system. At the risk of hijacking the thread I started, I'd be grateful for comments on the following system IO re

Re: [PERFORM] Advice sought : new database server

2012-03-08 Thread Ants Aasma
On Wed, Mar 7, 2012 at 10:18 PM, Merlin Moncure wrote: > those numbers are stupendous for 8 drive sata.  how much shared > buffers do you have? Couple of things to notice: 1) The benchmark can run fully in memory, although not 100% in shared_buffers. 2) These are 100k transaction runs, meaning th