Message Queues

Generally, the system clears queues quickly. If a problem arises, you can revise values for these parameters to rectify the situation:

Parameter	Description
mesg	This value must be 1. System-V style message queues are valid.
msgmni/project.max-msg-ids	The value of msgmni (project.max-msg-ids) represents the number of message queue identifiers. These identifiers determine the number of message queues that can exist throughout the system. In addition to the system default value and the requirements of other software, calculate what is needed for the JD Edwards EnterpriseOne installation (per JD Edwards EnterpriseOne instance). You can use these equation to estimate the number of message queues necessary for JD Edwards EnterpriseOne: 1 + jdenet_n + 2 x jdenet_k + (max number of concurrent runbatch, runube, and runprint processes)
msgtql/process.max-msg-messages	The value of msgtql (process.max-msg-messages) represents the number of message headers. This number determines the total number of messages that can be in all the message queues at the same time. In addition to the requirements of other software, allow a value equal to 10 x msgmni for the requirements of JD Edwards EnterpriseOne.
msgmap	The value for msgmap represents the number of entries in the map of free message segments. The default value of msgtql + 2 should be used. If the value of msgmap is less than the value of msgtql + 2, attempts to create a message queue or to send a message might fail. Note: This parameter was removed in Solaris 10.
msgmnb/process.max-msg-qbytes	The value of msgmnb (process.max-msg-qbytes) represents the maximum number of bytes that can reside on a single message queue at the same time. You should set the value for msgmnb at only a fraction of msgseg x msgssz. For JD Edwards EnterpriseOne, a value of 32768 is reasonable. You can set a larger value as long as the product of msgseg x msgssz is large enough. The minimum value is 8192. Additional requirements of this parameter might increase the value of msgmnb.
msgmax	The value of msgmax represents the maximum size, in bytes, of a single message. Do not set msgmax with a larger value than the value of msgmnb. The recommended setting is msgmax = msgmnb. The minimum value is 1024. Additional requirements of this parameter might increase the value of msgmax. Note: This parameter was removed in Solaris 10.

Note: Not all parameters are configurable in every operating system release.

Inside the HP-UX, messages in message queues reside in message segments. These parameters determine the size and number of segments available throughout the system:

Parameter	Description
msgssz	The value of msgssz represents the size of each message segment in bytes. For JD Edwards EnterpriseOne, a value of 64 is adequate for most situations. Note: This parameter was removed in Solaris 10.
msgseg	The value of msgseg represents the number of message segments throughout the system. In addition to the requirements of other software, allow a value equal to 50 x the msgmni requirement for JD Edwards EnterpriseOne, or approximately 4096 per instance. Note: This parameter was removed in Solaris 10.

Parameter

Description

msgssz

The value of msgssz represents the size of each message segment in bytes. For JD Edwards EnterpriseOne, a value of 64 is adequate for most situations.

Note: This parameter was removed in Solaris 10.

msgseg

The value of msgseg represents the number of message segments throughout the system. In addition to the requirements of other software, allow a value equal to 50 x the msgmni requirement for JD Edwards EnterpriseOne, or approximately 4096 per instance.

Note: This parameter was removed in Solaris 10.