Veritas File System 4.1 Administrator's Guide (HP-UX 11i v3, February 2007)

Quick I/O for Databases
Cached Quick I/O For Databases
Chapter 11 159
qio_cache_enable = 1
For more information on the format of the /etc/vx/qioadmin file and the command syntax, see the
qioadmin(1) manual page.
NOTE Check the setting of the flag qio_cache_enable using the vxtunefs command, and the
individual cache advisories for each file, to verify caching.
Tuning Cached Quick I/O
Not all database files can take advantage of caching. Performance may even degrade in some instances (due
to double buffering, for example). Determining which files and applications can benefit from Cached Quick
I/O requires that you first collect and analyze the caching statistics.
See the qiostat(1) manpage for information on gathering statistics, and the VERITAS Editions products
documentation for a description of the Cached Quick I/O tuning methodology.