Files copy 5x faster when Oracle is running!

From: Steve Sawicki <sawics_at_hotmail.com>
Date: 29 Apr 2002 12:07:14 -0700
Message-ID: <94d159e7.0204291107.236f4e4d@posting.google.com>

Hello,

Can any one tell me why when I attempt to copy datafiles within Solaris 2.7 from a RAID5 array to a striped array I see a 5x+ performance increase only while oracle 8.1.6 is running? I wrote a script to copy all instance files (.dbf, .ctl, .ora & logs) and tested it while the instance was up. The goal is to copy all files to an offline volume for cold backups. When I down the instance and execute the script 31GB in 1:15 turns into 5GB/hour! The only diff is that the instance is up or down. What is going here?!?! Help! Need cold backups!

Steve Received on Mon Apr 29 2002 - 14:07:14 CDT