HP-UX 11i Version 1.5 System Crash Dump

Selective Dumps

Chapter 112

Selective Dumps

In order to dump only those parts of memory that are most useful for

debugging a problem, HP-UX divides the pages of memory into several

classes. The rightmost column in this table shows which classes of

memory are included in a crash dump under most circumstances.

However, these defaults can be overridden by the system administrator

(see “Crash Dump Conﬁguration” on page 13). Also, there are some rare

circumstances in which only full dumps are possible.

Table 1-1

Name Description Included?

UNUSED Pages not currently in use. No

USERPG User-space pages, except

stacks.

USTACK User process stacks. Yes

KCODE Kernel code. No

KSDATA Kernel static data. Yes

KDDATA Kernel dynamic data, except

buffer cache data.

Yes

BCACHE Buffer cache data, except

buffers containing ﬁle

system metadata.

FSDATA Buffer cache buffers

containing ﬁle system

metadata (superblocks,

indirect blocks, and cylinder

groups).

Yes