dontdump.5 (2010 09)

dontdump(5) dontdump(5)

(Tunable Kernel Parameters)

Restrictions on Changing

Changes to this tunable take effect at next reboot. Use

crashconf to change the selection of pages to

take effect immediately.

When Should the Tunable Be Turned On?

This tunable should be turned on to exclude certain classes of pages from being dumped when there is a

system crash. This can be done to speedup the dump.

What Are the Side Effects of Turning the Tunable On?

If pages necessary for analyzing the dump are excluded, then the dump may not be useful for identifying

the cause of the system crash.

When Should the Tunable Be Turned Off?

The tunable is turned off by default.

What Are the Side Effects of Turning the Tunable Off?

The system decides the page classes that must not be dumped based on the type of crash. The dump may

take longer.

What Other Tunables Should Be Changed at the Same Time?

The

alwaysdump tunable should not contain the same page classes as dontdump.

WARNINGS

All HP-UX kernel tunable parameters are release speciﬁc. This parameter may be removed or have its

meaning changed in future releases of HP-UX.

Installation of optional kernel software, from HP or other vendors, may cause changes to tunable parame-

ter values. After installation, some tunable parameters may no longer be at the default or recommended

values. For information about the effects of installation on tunable values, consult the documentation for

the kernel software being installed. For information about optional kernel software that was factory

installed on your system, see HP-UX Release Notes at http://www.hp.com/go/hpux-core-docs

AUTHOR

dontdump was developed by HP.