Veritas Storage Foundation™ for Oracle 5.0.1 Administrator's Guide

pref_strength = 10
buf_breakup_size = 131072
discovered_direct_iosz = 262144
max_direct_iosz = 2097152
default_indir_size = 8192
Setting slave parameters
Quick I/O and ODM provide support for kernel asynchronous I/O, eliminating the
need for multiple logwriter slaves or database writer slaves. This parameter is set
to by default.
It is not necessary to set the DBWR_IO_SLAVES settings if you are using Quick
I/O. The number of writer processes is set within DB_WRITER_PROCESSES, which
performs asynchronous I/O.
Configuring memory allocation
Never configure Oracle to make use of more memory than is physically available
on the system. Oracle may have to compete with other processes for system
memory resources, and all of these potential processes must be considered when
sizing and allocating memory. In the ideal configuration, a system that is dedicated
to Oracle simplifies the tuning and monitoring issues and ensures best
performance.
About tuning HP-UX
To achieve optimal performance, certain HP-UX parameters need to be tuned.
Changing these parameters requires modifying the HP-UX kernel settings,
rebuilding the kernel, and rebooting the system. See the HP-UX System Ad
ministration Tasks manual for the detailed procedure on how to reconfigure the
HP-UX kernel. If you use SAM, the HP-UX system administration utility, to rebuild
your kernel, make sure the
Note: The settings for all tunable parameters depend on such factors as the size
of your system and database, the database load, and the number of users. In some
cases we make suggestions for setting the parameters; however, you should always
consult the Oracle Installation Guide for your system and version, and use the
settings recommended by Oracle when provided.
Tuning for performance
About tuning HP-UX
314