Question........:
Hello dear support,
I am requested to set some Kernel parameters before the installation
of an application software, as follows:
Message Queues:
MSGMAX to 4096 Max. size of a single IPC message
MSGMNB 4096 Max. Nbre of bytes on a single message queue
MSGMNI 50 System wide number of message queues
Semaphore Resources:
SEMMNS 128 Number of semaphores
SEMMNU 150 Number of semaphore undostructure
SEMMNI 36 System wide number of unique semaphores
Shared Memory Resources:
SHMMNI 100 System wide number of shared memory resources
SHMMAX 1500000 Max. size of single shared memory segment
Other Resources:
NFILE 3000 Max. no of open files system-wide
NFLOCKS 3000 Max. no of file locks system-wide
NPROC 1000 Max. no of processes system-wide
MAXUPRC 500 Max. Nbre of processes per user id
As much as I know the MAXUPRC can be set thru SMIT and that
AIX does not need to set its Kernel parameters in the way it is
designed.Is that true?
Do I have to set all or part of these parameters and how?
Thanks a lot.
Michel.
Answer..........:
RESPONSE:
There is only one of the above parameters that you can change.
MAXUPROC can be changed to 500 with "chdev -l sys0 -a maxuproc=500".
For the other parameters I am including a fax that talks about
what these are hard coded to be:
IPC (Inter-Process Communication) Limits
AIX 3.2 AIX 4.1 AIX 4.2
Semaphores ------- ------- -------
Maximum number of semaphore IDs 4096 4096 4096
Maximum semaphores per semaphore ID 65535 65535 65535
Maximum operations per semop call 1024 1024 1024
Maximum undo entries per process 1024 1024 1024
Size in bytes of undo structure 8208 8208 8208
Semaphore maximum value 32767 32767 32767
Adjust on exit maximum value 16384 16384 16384
Message Queues:
Maximum message size 65535 65535 65535
Maximum bytes on queue 65535 65535 65535
Maximum number of message queue IDs 4096 4096 4096
Maximum messages per queue ID 8192 8192 8192
Shared Memory:
Maximum segment size 256MB 256MB 256MB
Minimum segment size 1 1 1
Maximum number of shared memory IDs. 4096 4096 4096
Maximum number of segments per process 10 10 10
Thank you for using AIX Support services.
**************> QUESTION level 1 --> level 2 SPECIALIST <**************
====> THIS TEXT HAS BEEN ENTERED BY IBM IN ITALY
Question........:
Hello dear support,
I am requested to set some Kernel parameters before the installation
of an application software, as follows:
Message Queues:
MSGMAX to 4096 Max. size of a single IPC message
MSGMNB 4096 Max. Nbre of bytes on a single message queue
MSGMNI 50 System wide number of message queues
Semaphore Resources:
SEMMNS 128 Number of semaphores
SEMMNU 150 Number of semaphore undostructure
SEMMNI 36 System wide number of unique semaphores
Shared Memory Resources:
SHMMNI 100 System wide number of shared memory resources
SHMMAX 1500000 Max. size of single shared memory segment
Other Resources:
NFILE 3000 Max. no of open files system-wide
NFLOCKS 3000 Max. no of file locks system-wide
NPROC 1000 Max. no of processes system-wide
MAXUPRC 500 Max. Nbre of processes per user id
As much as I know the MAXUPRC can be set thru SMIT and that
AIX does not need to set its Kernel parameters in the way it is
designed.Is that true?
Do I have to set all or part of these parameters and how?
Thanks a lot.
Michel.
**************> ANSWER level 2 --> level 1 SPECIALIST <**************
====> THIS TEXT HAS BEEN ENTERED BY IBM IN USA
PMR 00176,998,758 was created on 97/04/18 at 15:02:41.
**************> ANSWER level 2 --> level 1 SPECIALIST <**************
====> THIS TEXT HAS BEEN ENTERED BY IBM IN USA
====> ASGN: SGARDNER AT WTSCPOK ================= DATE:970418
TIME:1126
Received by Austin ITSC and assigned to AIXOPSYS.
Your question has been received and assigned to a specialist. Please
wait for a reply. Thank you
**************> ANSWER level 2 --> level 1 SPECIALIST <**************
====> THIS TEXT HAS BEEN ENTERED BY IBM IN USA
====> RESP: AIXOPSYS AT WTSCPOK ================= DATE:970418
TIME:1200
YOUR ITEM HAS BEEN RECEIVED.
**************> ANSWER level 2 --> level 1 SPECIALIST <**************
====> THIS TEXT HAS BEEN ENTERED BY IBM IN USA
====> RESP: AIXOPSYS AT WTSCPOK ================= DATE:970419
TIME:0933
RESPONSE:
There is only one of the above parameters that you can change.
MAXUPROC can be changed to 500 with "chdev -l sys0 -a maxuproc=500".
For the other parameters I am including a fax that talks about
what these are hard coded to be:
IPC (Inter-Process Communication) Limits
AIX 3.2 AIX 4.1 AIX 4.2
Semaphores ------- ------- -------
Maximum number of semaphore IDs 4096 4096 4096
Maximum semaphores per semaphore ID 65535 65535 65535
Maximum operations per semop call 1024 1024 1024
Maximum undo entries per process 1024 1024 1024
Size in bytes of undo structure 8208 8208 8208
Semaphore maximum value 32767 32767 32767
Adjust on exit maximum value 16384 16384 16384
Message Queues:
Maximum message size 65535 65535 65535
Maximum bytes on queue 65535 65535 65535
Maximum number of message queue IDs 4096 4096 4096
Maximum messages per queue ID 8192 8192 8192
Shared Memory:
Maximum segment size 256MB 256MB 256MB
Minimum segment size 1 1 1
Maximum number of shared memory IDs. 4096 4096 4096
Maximum number of segments per process 10 10 10
Thank you for using AIX Support services.
WWQA: ITEM: RS4000013328 ITEM: RS4000013328
Dated: 04/1997 Category: AIX
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