Re: [PERFORM] Slow Performance on a XEON E5504

2012-08-25 Thread Scott Marlowe
No problem, hope it helps. The single most important part of any fast, transactional server is the RAID controller and its cache. On Sat, Aug 25, 2012 at 3:26 PM, Felix Schubert wrote: > Don't know but I forwarded the question to the System Administrator. > > Anyhow thanks for the information up

Re: [PERFORM] Slow Performance on a XEON E5504

2012-08-25 Thread Felix Schubert
Don't know but I forwarded the question to the System Administrator. Anyhow thanks for the information up to now! best regards, Felix Am 25.08.2012 um 14:59 schrieb Scott Marlowe : > Well it sounds like it does NOT have a battery back caching module on > it, am I right?

Re: [PERFORM] Loose Index Scans by Planner?

2012-08-25 Thread Shaun Thomas
> Not always. The case for having (col1,col2) might be very > compelling. True. But in our case, the table has like 8M rows, so and col1 is some kind of job identifier, so it's evenly distributed. Col2 on the other hand is a customer id, so it has much higher cardinality. Previous DBA missed it

Re: [PERFORM] Slow Performance on a XEON E5504

2012-08-25 Thread Scott Marlowe
On Sat, Aug 25, 2012 at 6:53 AM, Felix Schubert wrote: > Hi Scott, > > the controller is a HP i410 running 3x300GB SAS 15K / Raid 5 Well it sounds like it does NOT have a battery back caching module on it, am I right? -- Sent via pgsql-performance mailing list (pgsql-performance@postgresql.org

Re: [PERFORM] Slow Performance on a XEON E5504

2012-08-25 Thread Scott Marlowe
On Sat, Aug 25, 2012 at 6:59 AM, Scott Marlowe wrote: > On Sat, Aug 25, 2012 at 6:53 AM, Felix Schubert wrote: >> Hi Scott, >> >> the controller is a HP i410 running 3x300GB SAS 15K / Raid 5 > > Well it sounds like it does NOT have a battery back caching module on > it, am I right? Also what sof

Re: [PERFORM] Slow Performance on a XEON E5504

2012-08-25 Thread Felix Schubert
Hi Scott, the controller is a HP i410 running 3x300GB SAS 15K / Raid 5 Mit freundlichen Grüßen Felix Schubert Von meinem iPhone gesendet :-) Am 25.08.2012 um 14:42 schrieb Scott Marlowe : > On Sat, Aug 25, 2012 at 6:07 AM, Felix Schubert wrote: >> Hello List, >> >> I've got a system on a c

Re: [PERFORM] Slow Performance on a XEON E5504

2012-08-25 Thread Scott Marlowe
On Sat, Aug 25, 2012 at 6:07 AM, Felix Schubert wrote: > Hello List, > > I've got a system on a customers location which has a XEON E5504 @ 2.00GHz > Processor (HP Proliant) > > It's postgres 8.4 on a Debian Squeeze System running with 8GB of ram: > > The Postgres Performance on this system measu

[PERFORM] Slow Performance on a XEON E5504

2012-08-25 Thread Felix Schubert
Hello List, I've got a system on a customers location which has a XEON E5504 @ 2.00GHz Processor (HP Proliant) It's postgres 8.4 on a Debian Squeeze System running with 8GB of ram: The Postgres Performance on this system measured with pgbench is very poor: transaction type: TPC-B (sort of) sca