HP-UX HB v13.00 Ch-22 - Performance and Tuning

HP-UX Handbook – Rev 13.00 Page 4 (of 19)
Chapter 22 Performance & Tuning
October 29, 2013
HP-UX Performance and Tuning
Serious performance issues are complex ,often involving the Operating System, and the
physical resources which may not be HP components. In depth performance analysis is
considered to be a Consulting engagement best addressed by the APS Customer Performance
Team (CPT) which provides Performance Solutions and Consulting for complex computing
environments using HP-UX and Linux.
Examples of Consulting engagements:
 Customer complains of application performance, no triage has been done
 Oracle is performing slowly
 Oracle performance issues where Oracle AWR/statspack needs to be analyzed
 Comparison with other vendors (worked better on IBM, SUN, PA-RISC)
 High User CPU by application
 High I/O service times (can be due to poorly configured SAN, or FS tuning)
 Customer running their own benchmark (iozone, dd, cp, ftp, etc)
 Customer migrates to new HP-UX system and performance expectation set by sales team
is missed (for example, expectations were for 40% improvement, but customer only got a
20% improvement, but be careful, sometimes it’s a product limitation, such as HPVM)
Please refer such cases to them at the following link :
http://intranet.hp.com/tsg/WW2/CPT/Pages/CustomerPerformanceTeam.aspx
Contractually we are obligated to deliver due diligence to identify :
 High System CPU
 Mini-hangs
 Performance issues with HP products (VxFS, LVM, NFS, UFC, HP-VM, , fbackup, etc)
 Performance problems after installing patches (sometimes misleading as the problem was
caused by the reboot, not the patch install)
 High I/O service times (can be due to poor tests, FS tuning, VxFS bug, lock contention,
etc)
 System out of memory (check for memory leaks, etc)
 Customer running their own benchmark and uncovers an HP-UX bug
To accurately identify these areas , standard performance tools should be used . If an OS defect
is suspected, L2 may implement additional instrumentation sourced from the Worldwide
Technical Expert Center and engage an L3 resource to facilitate resolution.
Among the standard tools are the System Activity Reporter (sar) , iostat , vmstat, ps , and top.
Some clients have OpenView products such as Glance , Measureware and PerfView. These
products and their use are supported through the OpenView support Team.
First pass load and configuration should be collected to clarify the systems resources and