Date: Tue, 11 Aug 2009 09:53:47 +1000 From: Nathan Le Nevez <nathan@lenevez.net.au> To: "freebsd-performance@freebsd.org" <freebsd-performance@freebsd.org> Subject: Very slow I/O performance on HP BL465c Message-ID: <C6A6F02B.5D66%nathan@lenevez.net.au> In-Reply-To: <E4017C3E98A898429226B28DFA7730DBC165114EED@talon.lenevez.net.au>
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Hi, I'm running 7.2-p3 on 2x HP BL465c blade servers, one of which performs ver= y poorly. Both have the same RAID controller and 2 x 146GB 10k SAS disks configured in RAID-1. Both controllers have write-cache enabled. Both servers are running the same BIOS and firmware versions. Neither servers ar= e running any services other than sshd. Blade with good performance (2 x Opteron 2218, 8GB RAM): ciss0: <HP Smart Array E200i> port 0x4000-0x40ff mem 0xfdf80000-0xfdffffff,0xfdf70000-0xfdf77fff irq 19 at device 8.0 on pci80 ciss0: [ITHREAD] da0 at ciss0 bus 0 target 0 lun 0 da0: <COMPAQ RAID 1 VOLUMES MOPK:> AFPi xCePdU D#i2r Leacuntc hAcecde!s s SCSI-5 device da0: 135.168MB/s transfers dSaM0P:: CAoP CPU #3 Launched! mmand Queueing Enabled da0: 139979MB (286677120 512 byte sectors: 255H 32S/T 35132C) Blade with bad performance (2 x Opteron 2352, 16GB RAM): ciss0: <HP Smart Array E200i> port 0x4000-0x40ff mem 0xfdf80000-0xfdffffff,0xfdf70000-0xfdf77fff irq 19 at device 8.0 on pci80 ciss0: [ITHREAD] da0 at ciss0 bus 0 target 0 lun 0 da0: <COMPAQ RAID 1 VOLUME OK> Fixed Direct Access SCSI-5 device da0: 135.168MB/s transfers da0: Command Queueing Enabled da0: 139979MB (286677120 512 byte sectors: 255H 32S/T 35132C) # dbench -t 10 1 2 3 4 blade1 183.456 MB/sec 236.86 MB/sec 299.28 MB/sec 192.675 MB/sec blade2 6.97931 MB/sec 9.42293 MB/sec 10.2482 MB/sec 12.407 MB/sec Any help/ideas would be greatly appreciated. I have run through all the Insight diagnostics tools and it fails to find anything wrong with the slow server. Cheers, Nathan=20
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