Re: [PERFORM] performance drop on RAID5

2005-08-24 Thread Arjen van der Meijden
On 24-8-2005 16:43, Alexandre Barros wrote: Hello, i have a pg-8.0.3 running on Linux kernel 2.6.8, CPU Sempron 2600+, 1Gb RAM on IDE HD ( which could be called a "heavy desktop" ), measuring this performance with pgbench ( found on /contrib ) it gave me an average ( after several runs ) o

Re: [PERFORM] performance drop on RAID5

2005-08-24 Thread Merlin Moncure
> Hello, > i have a pg-8.0.3 running on Linux kernel 2.6.8, CPU Sempron 2600+, > 1Gb RAM on IDE HD ( which could be called a "heavy desktop" ), measuring > this performance with pgbench ( found on /contrib ) it gave me an > average ( after several runs ) of 170 transactions per second; 170 tps

Re: [PERFORM] performance drop on RAID5

2005-08-24 Thread Joshua D. Drake
Alexandre Barros wrote: Hello, i have a pg-8.0.3 running on Linux kernel 2.6.8, CPU Sempron 2600+, 1Gb RAM on IDE HD ( which could be called a "heavy desktop" ), measuring this performance with pgbench ( found on /contrib ) it gave me an average ( after several runs ) of 170 transactions

Re: [PERFORM] performance drop on RAID5

2005-08-24 Thread Rosser Schwarz
On 8/24/05, Alexandre Barros <[EMAIL PROTECTED]> wrote: > i wouldn't be so stunned if the newer machine was ( say ) twice faster > than the older server, but over three times faster is disturbing. RAID5 on so few spindles is a known losing case for PostgreSQL. You'd be far, far better off doing

Re: [PERFORM] performance drop on RAID5

2005-08-24 Thread Frank Wiles
On Wed, 24 Aug 2005 11:43:05 -0300 Alexandre Barros <[EMAIL PROTECTED]> wrote: > I've googled a little, and maybe the cluster size might be one > problem, but despite that, the performance dropping when running on > "server-class" hardware with RAID-5 SCSI-2 drives was way above my > most delir