Date: Tue, 13 Apr 2010 22:30:35 +0200 From: Christoph Weber-Fahr <cwf-ml@arcor.de> To: freebsd-proliant@freebsd.org, freebsd-performance@freebsd.org Subject: is trhere a problem with the HP SmartArray P410 and/or Postgres on FreeBSD ? Message-ID: <4BC4D46B.9040805@arcor.de>
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Hello, on a new HP Proliant DL385 G6 I have a P410 with BBWC and 8 hard drives in RAID5. (BBWC is Battery Backed Write Cache Enabler, and the controller is configured with 300M (75%) write cache). One of the applications we want to run is PostgreSQL (not the top priority, else we would use a different RAID scenario). But before getting the system live, we tested the performance. PostgreSQL gets a whole wopping 80 (!) tps out of this scenario wit pgbench ( -c 5 -t 5000) Now I had not expected top performance, but something to the tune of 500 tps should be well possible. And it's definitely a storage or filke system issue, since CPU is bored to death during the benchmark, while the file system is at 100% according to systat. On a comparable Hardware our test machine runs as a VM under VMWare and gets ~600 tps. Is there a known problem with this setup? OS is FreeBSD-amd64 7.2-p7 . Regards Christoph Wenber-Fahr
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