settune_txn.2 (2010 09)

s
settune_txn(2) settune_txn(2)
WARNING
It is possible to seriously degrade system performance, or even render a system unbootable, with incorrect
tunable settings. Use care when setting tunable values. Always have a known working kernel
configuration saved as a backup; if the system fails to boot after a tunable change, boot from that backup
kernel configuration. Keep good records of all tunable changes so that they can be reversed if they
degrade system performance. Tunable changes made with
settune_txn()
are automatically logged to
syslog.
If the tunables being changed through
settune_txn()
are used in expressions that set the values of
other tunables, those expressions will not be re-evaluated and those tunable values will not be updated.
This behavior may change in future releases of HP-UX. If expression evaluation is desired, use
kctune() to set tunable values.
Tunable changes made using
settune_txn() may not remain effective across reboots. This behavior
may change in future releases of HP-UX. If persistence of changes across reboots is desired, use
kctune() to set tunable values.
AUTHOR
settune_txn()
was developed by Hewlett-Packard Company.
SEE ALSO
kctune(1M), mk_kernel(1M), gettune(2), settune(2), tuneinfo2(2), privileges(5), and the individual tun-
able parameter man pages in section 5.
HP-UX 11i Version 3: September 2010 − 3 − Hewlett-Packard Company 3