Re: [PERFORM] raid array seek performance

2011-09-14 Thread Merlin Moncure
On Wed, Sep 14, 2011 at 2:44 AM, Greg Smith wrote: > If you want to get a useful measurement of seeks/second, setup pgbench-tools > with a SELECT-only test, and create a database that's 2 to 4X as big as RAM. >  The TPS result you get from that is a much more useful number for > real-world seeks t

Re: [PERFORM] raid array seek performance

2011-09-14 Thread Greg Smith
On 09/13/2011 03:13 PM, Samuel Gendler wrote: Bonnie++ delivered the expected huge throughput for sequential read and write. It seems in line with other benchmarks I found online. However, we are only seeing 180 seeks/sec, but seems quite low. I wouldn't worry about that if the sequential ra

Re: [PERFORM] raid array seek performance

2011-09-13 Thread Samuel Gendler
On Tue, Sep 13, 2011 at 12:13 PM, Samuel Gendler wrote: > I'm just beginning the process of benchmarking and tuning a new server. > Something I really haven't done before. I'm using Greg's book as a guide. > I started with bonnie++ (1.96) and immediately got anomalous results (I > think). > > H

[PERFORM] raid array seek performance

2011-09-13 Thread Samuel Gendler
I'm just beginning the process of benchmarking and tuning a new server. Something I really haven't done before. I'm using Greg's book as a guide. I started with bonnie++ (1.96) and immediately got anomalous results (I think). Hardware is as follows: 2x quad core xeon 5504 2.0Ghz, 2x4MB cache 1