System V Message Parameters

msgsys:msginfo_msgssz

Description

Specifies size of chunks system uses to manage space for message buffers. Obsolete since the Solaris 8 release.

Data Type

Signed integer

Default

40

Range

0 to MAXINT

Dynamic?

No. Loaded into msgtql field of msginfo structure.

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

Description

Number of messages the system supports. Obsolete since the Solaris 8 release.

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

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. Obsolete as of the Solaris 8 release.

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