Kbase 17656: HOW TO find and change Solaris kernel parameters
| Autor |
Progress Software Corporation - Progress |
| Acesso |
Público |
| Publicação |
10/05/1998 |
|
HOW TO find and change Solaris kernel parameters
Some of the Solaris system parameters that can be tuned..
tssolar1(plamothe): sysdef|grep SHM
8388608 max shared memory segment size (SHMMAX)
1 min shared memory segment size (SHMMIN)
100 shared memory identifiers (SHMMNI)
10 max attached shm segments per process (SHMSEG)
tssolar1(plamothe): sysdef|grep SEM
10 entries in semaphore map (SEMMAP)
70 semaphore identifiers (SEMMNI)
1024 semaphores in system (SEMMNS)
1024 undo structures in system (SEMMNU)
25 max semaphores per id (SEMMSL)
10 max operations per semop call (SEMOPM)
10 max undo entries per process (SEMUME)
32767 semaphore maximum value (SEMVMX)
16384 adjust on exit max value (SEMAEM)
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IMPORTANT!
Since changing these values involves modifying an important
system file, the recommendation should be directed at System
Administrators instead of the end-users.
To change these values, first make a backup copy of the
/etc/system file.
NOTE: If a modification is incorrect, this could cause the
system to be unbootable.
This would then require an administrator to go in
single-user or interactive boot-mode and make the changes back.
-------------------------------------------------------------
The following section is at the end of this file and
can be modified if shared memory or semaphores are
the issue.
set shmsys:shminfo_shmmax=8388608
set shmsys:shminfo_shmmin=1
set shmsys:shminfo_shmmni=100
set shmsys:shminfo_shmseg=10
set semsys:seminfo_semmns=1024
set semsys:seminfo_semmni=70
set semsys:seminfo_semmnu=1024
Other tunable parameters are found under the * Tunable Parameters
section of this file.
FINAL NOTE: CONTACTING SUN IS SUGGESTED BEFORE MAKING THESE
CHANGES AS THEY MAY WANT TO BE CONSULTED.
Progress Software Technical Support Note # 17656