Oracle Solaris Tunable Parameters Reference Manual

tmpfs:tmpfs_maxkmem

Description

Defines the maximum amount of kernel memory that TMPFS can use for its data structures (tmpnodes and directory entries).

Data Type

Unsigned long

Default

One page or 4 percent of physical memory, whichever is greater.

Range

Number of bytes in one page (8192 for sun4u or sun4v systems, 4096 for all other systems) to 25 percent of the available kernel memory at the time TMPFS was first used.

Units

Bytes

Dynamic?

Yes

Validation

None

When to Change

Increase if the following message is displayed on the console or written in the messages file:


tmp_memalloc: tmpfs over memory limit

The current amount of memory used by TMPFS for its data structures is held in the tmp_kmemspace field. This field can be examined with a kernel debugger.

Commitment Level

Unstable

Change History

For information, see tmpfs:tmpfs_maxkmem (Solaris 10 Releases).