Nonpersistent message speed (NPMSPEED)
This attribute specifies the speed at which nonpersistent messages are to be sent.
Possible values are:
- NORMAL
- Nonpersistent messages on a channel are transferred within transactions.
- FAST
- Nonpersistent messages on a channel are not transferred within transactions.
Notes:
- If the active recovery logs for IBM® MQ for z/OS® are switching and archiving more frequently than expected, given that the messages being sent across a channel are non-persistent, setting NPMSPEED(FAST) on both the sending and receiving ends of the channel can minimize the SYSTEM.CHANNEL.SYNCQ updates.
- If you are seeing high CPU usage relating to updates to the SYSTEM.CHANNEL.SYNCQ, setting NPMSPEED(FAST) can significantly reduce the CPU usage.
This attribute is valid for channel types of:
- Sender
- Server
- Receiver
- Requester
- Cluster sender
- Cluster receiver