nbuf(5)

NAME

nbuf — sets the system-wide number of file-system buffer and cache buffer headers

VALUES

Minimum

0 or 16

Maximum

Memory limited

Default

0

Specify an integer value of zero (see below).

DESCRIPTION

nbuf sets the system-wide number of file-system buffer and cache buffer headers (determines maximum total number of buffers on the system).

NOTE: This parameter is for backwards compatibility and should be set to zero because dynamic buffer cache is preferred.

If set to a nonzero value, nbuf specifies the number of buffer headers to be allocated for the file system buffer-cache. Each buffer is allocated 4096 bytes of memory unless overridden by a conflicting value for bufpages.

If nbuf is set to a nonzero value that is less than 16 or greater than the maximum supported by the system, or to a value that is inconsistent with the value of bufpages, the number will be increased or decreased as appropriate, and a message printed at boot time.

Related Parameters

nbuf interacts with bufpages. See bufpages(5) for details.

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.

AUTHOR

nbuf was developed by HP.