Oracle-L: RAID 5 impact on "sys" Utilization

From: VIVEK_SHARMA <VIVEK_SHARMA_at_infosys.com>
Date: Wed, 19 Feb 2003 02:03:53 -0800
Message-ID: <F001.0055115C.20030219020353@fatcity.com>

Will "sys" Component of CPU Utilization be Higher on a RAID 5 Volume Versus a RAID 1+0/0+1 Volume on a Database Server ?

Under peak Hybrid Loads the CPU Utilization's "sys" component is 50 % & "usr" component is 50 % .

Our Hybrid Application DATABASE is setup on a Hitachi Storage Box configured such that a SINGLE RAID 5 Volume spans across ALL the underlying Disks of the Storage Box .

Qs. Could Hardware RAID 5 be the Cause of High "sys" on respective DB Server ? Qs. Any people having any experience of HIGH "sys" on SF15K machines with Hybrid Databases ?

NOTE Application Software sits on a Different APP Server machine .

Banking Application Database
Oracle 8.1.7
Solaris 8
VXFS SF15K DB Server - 40 CPUs
Hitachi Storage Box from HP
Concurrent Oracle sessions = 5000

Will provide any info needed

Thanks
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Author: VIVEK_SHARMA
INET: VIVEK_SHARMA_at_infosys.com

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