Attributes for the queue manager

Some queue manager attributes are fixed for particular implementations; others can be changed by using the MQSC command ALTER QMGR.

The attributes can also be displayed by using the command DISPLAY QMGR. Most queue manager attributes can be inquired by opening a special MQOT_Q_MGR object, and using the MQINQ call with the handle returned.

The following table summarizes the attributes that are specific to the queue manager. The attributes are described in alphabetical order.

Note: The names of the attributes shown in this section are descriptive names used with the MQINQ call; the names are the same as for the PCF commands. When MQSC commands are used to define, alter, or display attributes, alternative short names are used. For more information, see MQSC commands.
Table 1. Attributes for the queue manager
Attribute Description
AccountingConnOverride Override accounting settings.
AccountingInterval How often to write intermediate accounting records.
ActivityConnOverride Override activity settings.
ActivityTrace Controls the collection of IBM® MQ MQI application activity trace.
AdoptNewMCACheck Elements checked to determine whether to adopt new MCA.
[z/OS]AdoptNewMCAType Whether to restart automatically an orphaned instance of an MCA of a particular channel type.
AlterationDate Date when definition was last changed.
AlterationTime Time when definition was last changed.
AuthorityEvent [Long Term Support]For Long Term Support and Continuous Delivery before IBM MQ 9.4.2, controls whether unsuccessful (Not Authorized) authorization events are generated.

[MQ 9.4.3 Jun 2025]From IBM MQ 9.4.2, controls whether successful and unsuccessful authorization events are generated.

[MQ 9.4.3 Jun 2025][UNIX, Linux, Windows, IBM i]AuthorityEventScope Controls the scope of authorization events when enabled.
[z/OS]BridgeEvent Control attribute for bridge events.
ChannelAutoDef Controls whether automatic channel definition is permitted.
ChannelAutoDefEvent Controls whether channel automatic-definition events are generated.
ChannelAutoDefExit Name of user exit for automatic channel definition.
ChannelEvent Control attribute for channel events.
ChannelInitiatorControl Control attribute for channel initiator.
ChannelMonitoring Online monitoring data for channels.
ChannelStatistics Controls collection of statistics data for channels.
[z/OS]ChinitAdapters Number of adapter subtasks for processing IBM MQ calls.
[z/OS]ChinitDispatchers Number of dispatchers to use for the channel initiator.
  Reserved for IBM use.
[z/OS]ChinitTraceAutoStart Whether channel initiator trace should start automatically.
[z/OS]ChinitTraceTableSize Size of channel initiator's trace data space.
ClusterSenderMonitoringDefault Online monitoring data default for cluster sender channels.
ClusterSenderStatistics Controls collection of statistics monitoring information for cluster sender channels.
ClusterWorkloadData User data for cluster workload exit.
ClusterWorkloadExit Name of user exit for cluster workload management.
ClusterWorkloadLength Maximum length of message data passed to cluster workload exit.
CLWLMRUChannels Number of most recently used channels for cluster workload balancing.
CLWLUseQ Cluster workload use remote queue.
CodedCharSetId Coded character set identifier.
CommandEvent Control attribute for command events.
CommandInputQName attribute Command input queue name.
CommandLevel Command level.
CommandServerControl attribute Control attribute for command server.
Configuration Event attribute Control attribute for configuration events.
DeadLetterQName Name of dead-letter queue.
DefClusterXmitQueueType Default cluster transmission queue type.
DefXmitQName Default transmission queue name.
DistLists Distribution list support.
[z/OS]DNSGroup Name of group for TCP listener when using Workload Manager Dynamic Domain Name Services support.
[z/OS]DNSWLM Whether TCP listener registers with Workload Manager for Dynamic Domain Name Services.
ExpiryInterval Interval between scans for expired messages.
IGQPutAuthority Intra-group queuing put authority.
IGQUserId Intra-group queuing user identifier.
InhibitEvent Controls whether inhibit (Inhibit Get and Inhibit Put) events are generated.
InitialKey 1 Initial key for the password protection system.
IPAddressVersion Version of the Internet Protocol address.
[z/OS]IntraGroupQueuing Intra-group queuing support.
[z/OS]ListenerTimer Time interval between attempts to restart listener after APPC or TCP/IP failure.
LocalEvent Controls whether local error events are generated.
LoggerEvent Controls whether logger events are generated.
[z/OS]LUGroupName Generic LU name for LU 6.2 listener that handles inbound transmissions for queue sharing group.
[z/OS]LUName Name of LU to use for outbound LU 6.2 transmissions.
LU62ARMSuffix Suffix of SYS1.PARMLIB member APPCPMxx, that nominates LUADD for this channel initiator.
[z/OS]LU62Channels Maximum number of current channels or connected clients that use LU 6.2.
MaxActiveChannels Maximum number of channels that can be active at any time.
MaxChannels Maximum number of current channels.
MaxHandles Maximum number of handles.
MaxMsgLength Maximum message length in bytes.
MaxPriority attribute Maximum priority.
MaxPropertiesLength Maximum length of property data in bytes.
MaxUncommittedMsgs Maximum number of uncommitted messages within a unit of work.
MQIAccounting Controls collection of accounting information for MQI data.
MQIStatistics Controls collection of statistics monitoring information for queue manager.
MsgMarkBrowseInterval Interval after which the queue manager can remove the mark from browsed messages.
[z/OS]OutboundPortMin With OutboundPortMin, defines range of port numbers to use when binding outgoing channels.
[z/OS]OutboundPortMin With OutboundPortMax, defines range of port numbers to use when binding outgoing channels.
PerformanceEvent Controls whether performance-related events are generated.
Platform Platform on which the queue manager is running.
PubSubNPInputMsg Whether to discard (or keep) an undelivered input message.
PubSubNPResponse Controls the behavior of undelivered.
PubSubMaxMsgRetryCount The number of retries when processing (under syncpoint) a failed command message.
PubSubSyncPoint Whether only persistent (or all) messages should be processed under syncpoint.
PubSubMode Whether the queued publish/subscribe interface is running.
QMgrDesc Queue manager description.
QMgrIdentifier Unique internally generated identifier of queue manager.
QMgrName Queue manager name.
QSGName Name of queue sharing group.
QueueAccounting Controls collection of accounting information for queues.
QueueMonitoring Online monitoring data for queues.
QueueStatistics Controls collection of statistics data for queues.
[z/OS]ReceiveTimeout How long TCP/IP channel waits for data before returning to inactive state.
[z/OS]ReceiveTimeoutMin Qualifier for ReceiveTimeout.
[z/OS]ReceiveTimeoutType Minimum time that TCP/IP channel waits for data before returning to inactive state.
RemoteEvent Controls whether remote error events are generated.
RepositoryName Name of cluster for which this queue manager provides repository services.
RepositoryNamelist Name of namelist object containing names of clusters for which this queue manager provides repository services.
ScyCase Case of security profiles
SharedQMgrName Shared queue queue manager name
SPLCAP Advanced Message Security (AMS) protection for a queue manager turned on or off.
SSLCRLNamelist 1 Name of namelist object containing names of authentication information objects.
SSLCryptoHardware 1 Cryptographic hardware configuration string.
SSLEvent Control attribute for TLS events.
SSLFIPSRequired Use only FIPS certified algorithms for cryptography.
SSLKeyRepository 1 Location of TLS key repository.
SSLKeyRepositoryPassword 1 The password for the TLS key repository.
SSLKeyResetCount TLS key reset count.
SSLTasks 1 Number of server subtasks for processing TLS calls.
StatisticsInterval How often to write statistics monitoring data.
StartStopEvent Controls whether start and stop events are generated.
SyncPoint Syncpoint availability.
[z/OS]TCPChannels Maximum number of current channels or connected clients that use TCP/IP.
[z/OS]TCPKeepAlive Whether to use TCP KEEPALIVE to check other end of connection.
[z/OS]TCPName Name of TCP/IP system that you are using.
[z/OS]TCPStackType How channel initiator can use TCP/IP addresses.
TraceRouteRecording attribute Controls recording of trace-route information.
TriggerInterval Trigger-message interval.
Version Version.
XrCapability Specifies whether Telemetry commands are supported.
Notes:
  1. This attribute cannot be inquired using the MQINQ call, and is not described in this section. See Change Queue Manager for details of this attribute.