HP-UX Stress Testing - The Workshop On Performance and Reliability
HP-UX Stress Testing - The Workshop On Performance and Reliability
HP-UX Stress Testing - The Workshop On Performance and Reliability
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<strong>Stress</strong> Test Disk UtilizationPeak disk is percentage of timeduring the interval that the busiestdisk device had IO in progress fromthe point of view of the OperatingSystem. It is not an averageutilization over all the disk devices.A peak disk utilization of more than50 percent often indicates a disk IOsubsystem bottleneck situation. Abottleneck may not be in thephysical disk drive itself, butelsewhere in the IO path.For this run, Max <strong>and</strong> Modal DiskPhysical Byte Rate labeled as PeakDisk are both 100%.March 2004 Copyright © 2004 <strong>HP</strong> corporate presentation. All rights reserved. 74
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