System V Message Queue Parameters
msgsys:msginfo_msgmni (Solaris 9 Releases)
Obsolete in the Solaris 10 release.
- Description
- Data Type
-
Signed integer
- Default
-
50
- Range
-
0 to MAXINT
- Dynamic?
-
No. Loaded into msgmni field of msginfo structure.
- Validation
-
None
- When to Change
-
When msgget(2) calls return with an error of ENOSPC or at the recommendation of a software vendor.
- Commitment Level
-
Unstable
msgsys:msginfo_msgtql (Solaris 9 Releases)
Obsolete in the Solaris 10 release.
- Description
-
Maximum number of messages that can be created. If a msgsnd call attempts to exceed this limit, the request is deferred until a message header is available. Or, if the request has set the IPC_NOWAIT flag, the request fails with the error EAGAIN.
- Data Type
-
Signed integer
- Default
-
40
- Range
-
0 to MAXINT
- Dynamic?
-
No. Loaded into msgtql field of msginfo structure.
- Validation
-
None
- When to Change
-
When msgsnd() calls block or return with error of EGAIN, or at the recommendation of a software vendor.
- Commitment Level
-
Unstable
msgsys:msginfo_msgmnb (Solaris 9 Releases)
Obsolete in the Solaris 10 release.
- Description
-
Maximum number of bytes that can be on any one message queue.
- Data Type
-
Unsigned long
- Default
-
4096
- Range
-
0 to amount of physical memory
- Units
-
Bytes
- Dynamic?
-
No. Loaded into msgmnb field of msginfo structure.
- Validation
-
None
- When to Change
-
When msgsnd() calls block or return with an error of EGAIN, or at the recommendation of a software vendor.
- Commitment Level
-
Unstable
msgsys:msginfo_msgssz (Solaris 9 Releases)
Removed in the Solaris 10 release.
- Description
-
Specifies size of chunks system uses to manage space for message buffers.
- Data Type
-
Signed integer
- Default
-
40
- Range
-
0 to MAXINT
- Dynamic?
-
No. Loaded into msgtql field of msginfostructure.
- Validation
-
The space consumed by the maximum number of data structures that would be created to support the messages and queues is compared to 25% of the available kernel memory at the time the module is loaded. If the number is too big, the message queue module refuses to load and the facility is unavailable. This computation does include the space that might be consumed by the messages. This situation occurs only when the module is first loaded.
- When to Change
-
When the default value is not enough. Generally changed at the recommendation of software vendors.
- Commitment Level
-
Obsolete
msgsys:msginfo_msgmap (Solaris 9 Releases)
Removed in the Solaris 10 release.
- Description
-
Number of messages the system supports.
- Data Type
-
Signed integer
- Default
-
100
- Range
-
0 to MAXINT
- Dynamic?
-
No
- Validation
-
The space consumed by the maximum number of data structures that would be created to support the messages and queues is compared to 25% of the available kernel memory at the time the module is loaded. If the number is too big, the message queue module refuses to load and the facility is unavailable. This computation does include the space that might be consumed by the messages. This situation occurs only when the module is first loaded.
- When to Change
-
When the default value is not enough. Generally changed at the recommendation of software vendors.
- Commitment Level
-
Obsolete
msgsys:msginfo_msgseg (Solaris 9 Releases)
Removed in the Solaris 10 release.
- Description
-
Number of msginfo_msgssz segments the system uses as a pool for available message memory. Total memory available for messages is msginfo_msgseg * msginfo_msgssz.
- Data Type
-
Signed short
- Default
-
1024
- Range
-
0 to 32,767
- Dynamic?
-
No
- Validation
-
The space consumed by the maximum number of data structures that would be created to support the messages and queues is compared to 25% of the available kernel memory at the time the module is loaded. If the number is too big, the message queue module refuses to load and the facility is unavailable. This computation does not include the space that might be consumed by the messages. This situation occurs only when the module is first loaded.
- When to Change
-
When the default value is not enough. Generally changed at the recommendation of software vendors.
- Commitment Level
-
Obsolete
msgsys:msginfo_msgmax (Solaris 9 Releases)
Removed in the Solaris 10 release.
- Description
- Data Type
-
Unsigned long
- Default
-
2048
- Range
-
0 to amount of physical memory
- Units
-
Bytes
- Dynamic?
-
No. Loaded into msgmax field of msginfo structure.
- Validation
-
None
- When to Change
-
When msgsnd(2) calls return with error of EINVAL or at the recommendation of a software vendor.
- Commitment Level
-
Unstable
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