Tunable Kernel Parameters

Table of Tunable Kernel Parameters
Appendix A
73
IPC: Semaphore semmsl Maximum number of individual System V IPC
semaphores per semaphore identifier. Manpage: semmsl
(5).
IPC: Semaphore semume Maximum number of IPC semaphores that a given process
can have undo operations pending on. Manpage: semume
(5).
IPC: Semaphore semvmx Maximum value any given IPC semaphore is allowed to
reach (prevents undetected overflow conditions).
Manpage: semvmx (5).
Miscellaneous:
Web
sendfile_max The amount of buffer cache that can be used by the
sendfile() system call on HP-UX web servers. Manpage:
sendfile_max (5).
IPC: Share shmem Enable or disable shared memory at system boot time.
Manpage: shmem (5).
IPC: Share shmmax Maximum allowable shared memory segment size (in
bytes). Manpage: shmmax (5).
IPC: Share shmmni Maximum number of shared memory segments allowed on
the system at any given time. Manpage: shmmni (5).
IPC: Share shmseg Maximum number of shared memory segments that can
be attached simultaneously to any given process.
Manpage: shmseg (5).
Streams STRCTLSZ Maximum number of control bytes allowed in the control
portion of any streams message on the system. Manpage:
strctlsz (5).
Streams streampipes Force all pipes to be streams-based. Manpage: streampipes
(5).
Streams STRMSGSZ Maximum number of bytes that can be placed in the data
portion of any streams message on the system. Manpage:
strmsgsz (5).
File System:
SCSI
st_ats_enabled Flag whether to reserve a tape device on open. Manpage:
st_ats_enabled (5).
File System:
SCSI
st_fail_overruns SCSI tape read resulting in data overrun causes failure.
Manpage: st_fail_overruns (5).
File System:
SCSI
st_large_recs Enable large record support for SCSI tape. Manpage:
st_large_recs (5).
Table A-1 Tunable Kernel Parameters in Alphabetic Order (Continued)
Category Tunable Description