Re: [PERFORM] Adaptec 5805 SAS Raid

2008-03-14 Thread Leigh Dyer
Glyn Astill wrote: Any of you chaps used this controller? It looks very similar to the rebadged Adaptec that Sun shipped in the X4150 I ordered a few weeks ago, though the Sun model had only 256MB of cache RAM. I was wary of going Adaptec after my experiences with the PERC/3i, which

Re: [PERFORM] Recomendations on raid controllers raid 1+0

2008-03-13 Thread Leigh Dyer
Glyn Astill wrote: Bonie++ benchmarks below. I believe the the Perc 5/i Raid 10 mode is actually a span of mirrors, rather than the expected stripe of mirrors we should expect from 1+0, and that this is the reason for the shitty performance. Could you build three RAID-1 mirrors on the

Re: [PERFORM] Performance with 2 AMD/Opteron 2.6Ghz and 8gig

2006-07-28 Thread Leigh Dyer
Mikael Carneholm wrote: I would be interested in what numbers you would get out of bonnie++ (http://www.coker.com.au/bonnie++) and BenchmarkSQL (http://sourceforge.net/projects/benchmarksql) on that hardware, for comparison with our DL385 (2xOpteron 280, 16Gb ram) and MSA1500. If you need help

Re: [PERFORM] 64-bit vs 32-bit performance ... backwards?

2006-06-12 Thread Leigh Dyer
Alex Turner wrote: Anyone who has tried x86-64 linux knows what a royal pain in the ass it is. They didn't do anything sensible, like just make the whole OS 64 bit, no, they had to split it up, and put 64-bit libs in a new directory /lib64. This means that a great many applications don't

Re: [PERFORM] Large (8M) cache vs. dual-core CPUs

2006-04-25 Thread Leigh Dyer
[EMAIL PROTECTED] wrote: Another benefit of Pentium D over AMD X2, at least until AMD chooses to switch, is that Pentium D supports DDR2, whereas AMD only supports DDR. There are a lot of technical pros and cons to each - with claims from AMD that DDR2 can be slower than DDR - but one claim that

Re: [PERFORM] Sun Fire T2000 and PostgreSQL 8.1.3

2006-04-06 Thread Leigh Dyer
Miguel wrote: Excuse me for this off topic, but i notice that you are very excited about the sun's hardware, what os do you install on them , slowlaris?, has that os improved in some espectacular way that i should take a look again?, i used it until solaris 9 and the performance was

Re: [PERFORM] Sun Fire T2000 and PostgreSQL 8.1.3

2006-04-05 Thread Leigh Dyer
Luke Lonergan wrote: Juan, On 4/5/06 5:33 PM, Juan Casero (FL FLC) [EMAIL PROTECTED] wrote: ... but I am looking to see if the performance benefit we can get from this server is worth the price tag right now. While many people here will look forward to performance results on the T2000, I

Re: [PERFORM] Sun Fire T2000 and PostgreSQL 8.1.3

2006-04-05 Thread Leigh Dyer
Luke Lonergan wrote: Leigh, On 4/5/06 9:23 PM, Leigh Dyer [EMAIL PROTECTED] wrote: We've got a Sun Fire V40z and it's quite a nice machine -- 6x 15krpm drives, 4GB RAM, and a pair of Opteron 850s. This gives us more than enough power now for what we need, but it's nice to know that we can

Re: [PERFORM] Help speeding up delete

2005-11-18 Thread Leigh Dyer
Steve Wampler wrote: Is the performance behavior that we're experiencing a known problem with 7.2 that has been addressed in 7.4? Or will the upgrade fix other problems while leaving this one? I'm pretty sure that in versions earlier than 7.4, IN clauses that use a subquery will always use