Filter
Top Products
Controlling Memory Utilization of VxFS 3.5 on HP-UX 11i v2
Controlling the inode Cache
Appendix C 157
Controlling the inode Cache
As a matter of course, VxFS file systems allocate and free up inodes as
required by the load on the file system. VxFS caches these inodes for
better performance (faster lookups). In general, larger inode caches help
file systems perform better for file/web server loads. The global (static)
tunable vx_ninode represents the maximum possible size of the VxFS
inode cache.
Normally, the size of the inode cache is decided (auto-tuned) at boot time
by VxFS depending on the amount of physical memory in the machine,
provided that the value of vx_ninode is set to zero (default).
However, systems low on RAM (typically less than or equal to 1GB/CPU)
may not require a large inode cache if file systems are not exposed to
file/web server loads, or file system performance is not critical. It is
recommended that the value of vx_ninode be set to more than that of
nfile
, an HP-UX tunable that represents the maximum number of file
descriptors.