The following table lists all parameters in alphabetical order. Parameters displayed in bold print can be modified dynamically using the usp command. The column Category indicates the category the parameter belongs to:
| General | General system parameter |
| File system | File system parameter |
| IPC | Control parameter for interprocess communication |
| POSIX | Special parameter for POSIX |
In the as-delivered state of the information file, no value is entered for the ROOTFSNAME control parameter. When POSIX is installed for the first time, the name of the root file system is automatically entered by the POSIX installation program. The system ID SYSROOT is mandatory since it is owner of the root filesystem and needs not to be specified. You can enter numerical values in the units of measure kilo (K, equivalent to 1024) and mega (M, equivalent to 1048576).
Parameter | Description | Default | Min. value | Max. value | Category |
|---|---|---|---|---|---|
BINDANY | BCAM / mode flag | 0 | 0 | 1 | POSIX |
BUFHWM | high-water-mark of buffer cache | 2000 | 200 | 2000 | file system |
DBLPOOL | memory pool in class 6 memory | 0 | 0 | 1024 | POSIX |
DBLSTATE | state of the loader | 0 | 0 | 1 | POSIX |
FDFLUSHR | fsflush time interval | 5 | 1 | 5 | file system |
FILESIZE | max. size of file | UNLIMITED | 64 | UNLIMITED | general |
FLCKREC | max. # of active file records locks | 1000 | 100 | 2000 | general |
FORCEDTERM | controlling termination | 0 | 0 | 1 | POSIX |
HDPTNI | # of partition table entries | 200 | 16 | 300 | general |
HDSTNI | # of hard disk server tasks | 4 | 1 | 16 | general |
HEAPSZ | size of heap-segment | 4M | 2M | 64M | general |
KMAHWM | kma daemonkmem high water mark | 2M | 1M | 2M | general |
MAXTIMERC | max. wait time for rc term procs | 660 | 120 | 1200 | POSIX |
MAXUP | max. # of processes per user | 50 | 15 | 500 | general |
MINPAGEFREE | pageout daemon / min. # of free pages | 0 | 0 | 0 | general |
MSGMAP | # of entries in msg map | 200 | 10 | 200 | IPC |
MSGMAX | max. message size | 2048 | 512 | 2048 | IPC |
MSGMNB | max. # bytes on queue | 16384 | 4096 | 16384 | IPC |
MSGMNI | # of message queue identifiers | 150 | 50 | 150 | IPC |
MSGSEG | # of msg segments (MUST BE < 32768) | 2048 | 1024 | 32768 | IPC |
MSGSSZ | msg segment size | 8 | 8 | 8 | IPC |
MSGTQL | # of system message headers | 160 | 40 | 160 | IPC |
NAUTOUP | age of a delayed-write buffer | 60 | 10 | 120 | file system |
NBUF | # of I/O buffers | 200 | 100 | 2000 | file system |
NHBUF | buffer cache size for metadata | 256 | 32 | 1024 | file system |
NOFILES | max. # of file descriptors | 2048 | 2048 | 4096 | general |
NOPTY | max. # of ptys | 64 | 4 | 1024 | POSIX |
NOSTTY | max. # of sttys | 64 | 4 | 2000 | POSIX |
NOTTY | max. # of ttys | 64 | 4 | 1024 | POSIX |
NPBUF | number of physical I/O buffers | 20 | 20 | 40 | general |
NPROC | max. # of processes | 200 | 50 | 2000 | general |
NRNODE | max. # of incore remote nodes (nfs) | 600 | 400 | 600 | file system |
PGOVERFLOW | overflow buffers for pageout | 32 | 32 | 32 | general |
PORTMON | port monitoring (nfs) | 1 | 0 | 1 | POSIX |
ROOTFSNAME | name of root-file system | --- | --- | --- | --- |
SEGMAPSZ | # of buffer cache entries | 256 | 256 | 22500 | file system |
SEMAEM | adjust on exit max value | 16384 | 16384 | 16384 | IPC |
SEMMAP | # of entries in semaphore map | 150 | 10 | 150 | IPC |
SEMMNI | # of semaphore identifiers | 150 | 10 | 150 | IPC |
SEMMNS | # of semaphores in system | 200 | 60 | 200 | IPC |
SEMMNU | # of undo structures in system | 200 | 30 | 200 | IPC |
SEMMSL | max. # of semaphores per id | 25 | 25 | 25 | IPC |
SEMOPM | max. # of operations per semop call | 20 | 10 | 20 | IPC |
SEMUME | max. # of undo entries per process | 20 | 10 | 20 | IPC |
SEMVMX | semaphore maximum value | 32767 | 32767 | 32767 | IPC |
SHMMAX | max. size of a shared memory segment | 16M | 131072 | 16M | IPC |
SHMMIN | min. size of a shared memory segment | 1 | 1 | 1 | IPC |
SHMMNI | # of shared memory headers | 100 | 100 | 100 | IPC |
SHMSEG | max. # of segments per process | 16 | 6 | 16 | IPC |
UFSNINODE | # of inodes | 1000 | 600 | 1000 | file system |