HP CIFS Server 3.0d Administrator's Guide version A.02.02 (Edition 5)

HP-UX Configuration for HP CIFS
Overview of Kernel Configuration Parameters
Chapter 12258
Overview of Kernel Configuration Parameters
The kernel configuration parameters, maxuser, nproc, ninode, nflocks
and nfile are described below. These are the kernel parameters that you
must adjust to support a large number of clients on HP CIFS.
• maxusers: the name of this kernel parameter is a misnomer as it
does not directly control the number of UNIX users that can logon to
HP-UX. However, this kernel parameter is used in various formulae
throughout the kernel. In fact, the default values for nproc, nfiles
and ninodes are expressed in terms of maxusers.
• nproc: this kernel parameter controls the size of the process table. Its
default formula is (20+8*maxusers). On most systems the default
value for this parameter is 21, which yields a default value of
20+8*32 or 276 maximum processes supported. When this table fills
up prior to launching a process, the error message: “proc: table is
full” will appear on the console. It will be viewable via the dmesg
command.
• nfile: this kernel parameter controls the size of the system file table
and limits the total number of open files in the system. Note that this
affects each instance of an open file since the same file opened twice
would take up 2 entries in the system file table. This default formula
is (16*(nproc+16+maxusers)/10+32+2*(npty+nstrpty+nstrtel)).
When this tables becomes full, the console message file: table is full
will appear on the console.
• ninode: this kernel parameters controls the size of the in-core inode
table or the inode cache. To improve performance, the most recently
accessed inodes are kept in memory. The default formula for this
parameter is ((nproc+16+maxusers)+32+(2*npty)). Attempts to open
a file beyond the capacity of this table will result in the message
inode table full being displayed on the console.
• nflocks: defines the maximum combined total number of file locks
that are available system-wide to all processes at any given time.
The default value of 200 will need to be increased for HP CIFS
Servers.