OEL4 slowness on VMWare
- From: "Allen, Brandon" <Brandon.Allen@xxxxxxxxxxx>
- To: "oracle-l" <oracle-l@xxxxxxxxxxxxx>
- Date: Thu, 4 Sep 2008 11:44:51 -0700
Hi List,
Has anyone else noticed major performance issues running OEL4 on VMWare?
We're running both OEL5 (64-bit) and OEL4 (32-bit) on the same VMWare
ESX 3.5 server, and performance for OEL5 is great, while OEL4 is
terrible (see details below). We also tried the latest OEL4 update 7,
but it wasn't any better either. We're going to test 64-bit OEL4 next
to see if it's any better, but I'm just curious if anyone else has seen
this and has any idea what the problem is? I've searched all over the
Internet, metalink, vmware support, etc. and found nothing so far.
Thanks,
Brandon
OEL4 (32bit):
->cat /etc/issue
Enterprise Linux Enterprise Linux AS release 4 (October Update 6)
->uname -a
Linux 2.6.9-67.0.0.0.1.ELhugemem #1 SMP Sun Nov 18 00:31:12 EST 2007
i686 i686 i386 GNU/Linux
->sudo /sbin/hdparm -Tt /dev/sdb (repeated 3 times)
Timing cached reads: 732 MB in 1.99 seconds = 368.27 MB/sec
Timing buffered disk reads: 154 MB in 3.00 seconds = 51.27 MB/sec
->date;dd if=/dev/zero of=/u01/oracle/test.dbf bs=8k count=524288;date
Tue Sep 2 15:20:30 MST 2008
524288+0 records in
524288+0 records out
Tue Sep 2 15:23:14 MST 2008
4096/164=25MB/sec
OEL5 (64bit):
->cat /etc/issue
Enterprise Linux Enterprise Linux Server release 5.2 (Carthage)
->uname -a
Linux 2.6.18-92.el5 #1 SMP Fri May 23 23:40:43 EDT 2008 x86_64 x86_64
x86_64 GNU/Linux
->sudo /sbin/hdparm -Tt /dev/sdb
Timing cached reads: 21888 MB in 1.99 seconds = 11004.81 MB/sec
Timing buffered disk reads: 250 MB in 3.01 seconds = 82.94 MB/sec
->date;dd if=/dev/zero of=/u01/oracle/test.dbf bs=8k count=524288;date
Tue Sep 2 15:34:14 MST 2008
524288+0 records in
524288+0 records out
Tue Sep 2 15:34:44 MST 2008
4096/30=137MB/sec
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