Server Tuning on HP-UX

maxssiz_64bit 1GB 256MB

maxtsiz 1GB 96MB

maxtsiz_64bit 8GB 1GB

vps_ceiling 64 16

vps_chatr_ceiling 4194304 1048576

swchunk 65536 2048

shmmax 4096GB 1GB

shmmni 4096 530

O_sync_is_o_dsync 1 0

Interaction with other sources of kernel tuning

User-defined tunable settings

The Server-Tunables script will not override a kernel parameter if it has been modified from its default

value to a value larger than would be set by Server-Tunables. In other words, Server-Tunables will not

reduce the capacity of the system if the administrator has already set a particular tunable parameter.

Oracle-derived settings

The kernel parameters set by Server-Tunables are compatible with the parameters recommended by

Oracle in the Oracle Database Installation Guide (see Appendix A).

Java-derived settings

The Server-Tunables product will set parameters that match or exceed those recommended by

HPJconfig.

Summary

Installing and running the Server-Tunables product is an easy way to assure good performance on

your database server or application server. Further performance improvements may be achieved

through measurement and additional tuning using the tools and techniques that HP-UX provides but

the first step on the path to better performance should be the Server-Tunables product.