04-22-2010
Thanks for the command.
Does it activate once VxFS is installed.
I mean I have Solaris 10 with VxFS software and license.
Once the path dual path to LUN via OS is discovered then what.
Setup dual path, Initialize the disks for VM control vxdisksetup -i ?
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LEARN ABOUT HPUX
vxfs_bc_bufhwm
vxfs_bc_bufhwm(5) File Formats Manual vxfs_bc_bufhwm(5)
NAME
vxfs_bc_bufhwm - VxFS buffer cache high water mark(determines the VxFS buffer cache size)
SYNOPSIS
VALUE
Specify an integer value.
Minimum
6144 KB
Maximum
None
Default
0
DESCRIPTION
VxFS maintains a buffer cache in the kernel for frequently accessed file system metadata in addition to the HP-UX kernel buffer cache that
caches the file data. tunable parameter determines the size of the VxFS buffer cache (the maximum amount of memory that can be used to
cache VxFS metadata).
The default value computed based on the amount of system memory ensures good system performance across a wide range of applications.
The value of is specified in kilobytes. To improve performance during application loads that cause frequent file system metadata changes on
the system (for example, a high rate of file creation or deletion, or accessing large directories), change the value of
Notes
Use the command to monitor buffer cache statistics and inode cache usage.
EXAMPLES
Set the maximum of size of buffer cache at 300000:
WARNINGS
All HP-UX kernel tunable parameters are release specific. This parameter may be removed or its meaning may change in the future releases
of HP-UX.
Installation of optional kernel software, from HP or other vendors, may cause changes to tunable parameter values. After installation,
some tunable parameters may no longer be at the default or recommended values. For information about the effects of installation on tun-
able values, consult the documentation for the kernel software being installed. For information about optional kernel software that was
factory installed on your system, see at
SEE ALSO
kctune(1M), vxfsstat(1M), vx_maxlink(5), vx_ninode(5), vxfs_ifree_timelag(5).
Tunable Kernel Parameters vxfs_bc_bufhwm(5)