Veritas File System 4.1 Administrator's Guide (HP-UX 11i v3, February 2007)

VxFS Performance: Creating, Mounting, and Tuning File Systems
Kernel Tunables
Chapter 240
The default value of vxfs_ifree_timelag is 0. By setting vxfs_ifree_timelag to 0, the inode free
timelag is autotuned to 1800 seconds. Specifying negative one (–1) stops the freeing of inode space; no
further inode allocations are freed until the value is changed back to a value other than negative one.
You can change the value of vx_ifree_timelag using the sam or kctune commands (see the sam(1M) and
kctune(1M) manual pages), or by adding an entry to the system configuration file. The following example
changes the value of vx_ifree_timelag to 2400 seconds:
# kctune –s vxfs_ifree_timelag=2400
NOTE The default value vxfs_ifree_timelag typically provides optimal VxFS performance.
Be careful when adjusting the tunable because incorrect tuning can adversely affect system
performance.