Caché Installation Guide - InterSystems Documentation

Kernel
Parameter
SEMMNI
SEMMNS
SEMMSL
SHMALL
SHMMNI
SHMSEG
SHMMAX
Recommended Minimum Value
Product of SEMMNI and SEMMSL
must be greater than the # of user
processes + 4
128 or ...
Number of processes expected to
run. If the process table might
expand, use a larger number to
provide for expansion.
See SEMMNI
60 KB or ...
1000 + total global buffer space+
total routine buffer space *
3
3
60 KB or ...
1000 + total global buffer space+
total routine buffer space
Configure UNIX Kernel Parameters
Definition
Number of semaphore identifiers
in the kernel; this is the number of
unique semaphore sets that can
be active at any one time.
Total number of semaphores in the
system. User processes include
jobbed processes and all other
semaphores required by other
software.
Maximum number of semaphores
per identifier list.
Maximum total shared memory
system-wide. Units should be in
KB. 1000 represents the
MCOMMON shared region.
Maximum number of shared
memory identifiers system-wide.
Number of attached shared
memory segments per process.
Maximum shared memory segment
size in KB.
* This is the minimum value for SHMALL required for Caché UNIX. You must also take into account
any other applications that use shared memory. If you are unsure of other shared memory use, calculate
SHMALL as SHMSEG multiplied by SHMMAX, in pages; this larger value suffices in all cases.
Important:
Enough swap space must be created to support the memory allocated, unless the
operating system documentation explicitly states otherwise. On certain operating
systems (Solaris, for example) Caché creates locked shared memory segments, which
are not pageable but still may need swap space.
B.2.2 Adjust Maximum File Size
The hard limit for the maximum file size (RLIMIT_FSIZE) on any system running Caché must be
unlimited. When Caché runs as a user other than root, its daemons do not have the proper privileges
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