Re: [PERFORM] Raid 5 vs Raid 10 Benchmarks Using bonnie++

2011-08-18 Thread Mark Kirkwood
On 19/08/11 12:52, Mark Kirkwood wrote: On 19/08/11 02:09, Ogden wrote: On Aug 18, 2011, at 2:07 AM, Mark Kirkwood wrote: On 18/08/11 17:35, Craig Ringer wrote: On 18/08/2011 11:48 AM, Ogden wrote: Isn't this very dangerous? I have the Dell PERC H700 card - I see that it has 512Mb Cache. Is

Re: [PERFORM] Raid 5 vs Raid 10 Benchmarks Using bonnie++

2011-08-18 Thread Mark Kirkwood
On 19/08/11 02:09, Ogden wrote: On Aug 18, 2011, at 2:07 AM, Mark Kirkwood wrote: On 18/08/11 17:35, Craig Ringer wrote: On 18/08/2011 11:48 AM, Ogden wrote: Isn't this very dangerous? I have the Dell PERC H700 card - I see that it has 512Mb Cache. Is this the same thing and good enough to s

[PERFORM] settings input for upgrade

2011-08-18 Thread Midge Brown
I'm in the process of upgrading from postgres 7.4.8 to 9.0.4 and wanted to run my decisions past some folks who can give me some input on whether my decisions make sense or not. It's basically a LAPP configuration and on a busy day we probably get in the neighborhood of a million hits. Serve

Re: [PERFORM] Calculating statistic via function rather than with query is slowing my query

2011-08-18 Thread Anish Kejariwal
Hi Craig, Fair point. For now, I mean "just fast" - which is 5-15 seconds, but I'd like to get it down to the 1-2 second range. >From the query I provided, I have approximately 30,000 unique keys (what I called primary_id) that I'm grouping by, and each key has a series of numerical values for e

Re: [PERFORM] Raid 5 vs Raid 10 Benchmarks Using bonnie++

2011-08-18 Thread Ogden
On Aug 17, 2011, at 4:17 PM, Greg Smith wrote: > On 08/17/2011 02:26 PM, Ogden wrote: >> I am using bonnie++ to benchmark our current Postgres system (on RAID 5) >> with the new one we have, which I have configured with RAID 10. The drives >> are the same (SAS 15K). I tried the new system with

Re: [PERFORM] Raid 5 vs Raid 10 Benchmarks Using bonnie++

2011-08-18 Thread Ogden
On Aug 18, 2011, at 2:07 AM, Mark Kirkwood wrote: > On 18/08/11 17:35, Craig Ringer wrote: >> On 18/08/2011 11:48 AM, Ogden wrote: >>> Isn't this very dangerous? I have the Dell PERC H700 card - I see that it >>> has 512Mb Cache. Is this the same thing and good enough to switch to >>> nobarrier

Re: [PERFORM] Raid 5 vs Raid 10 Benchmarks Using bonnie++

2011-08-18 Thread Aidan Van Dyk
On Thu, Aug 18, 2011 at 1:35 AM, Craig Ringer wrote: > On 18/08/2011 11:48 AM, Ogden wrote: >> >> Isn't this very dangerous? I have the Dell PERC H700 card - I see that it >> has 512Mb Cache. Is this the same thing and good enough to switch to >> nobarrier? Just worried if a sudden power shut down

Re: [PERFORM] tunning strategy needed

2011-08-18 Thread Tomas Vondra
On 18 Srpen 2011, 0:40, hyelluas wrote: > Should I start with replacing the sql with procedures? > > Should I start with replacing the views with the procedures to save time > on > recreating an execution plan and parsing? > > Should I start with tuning server parameters ? Yes, you should start b

Re: [PERFORM] Raid 5 vs Raid 10 Benchmarks Using bonnie++

2011-08-18 Thread Mark Kirkwood
On 18/08/11 17:35, Craig Ringer wrote: On 18/08/2011 11:48 AM, Ogden wrote: Isn't this very dangerous? I have the Dell PERC H700 card - I see that it has 512Mb Cache. Is this the same thing and good enough to switch to nobarrier? Just worried if a sudden power shut down, then data can be lost