Bytes Maximum

The maximum bytes quota (total amount of bytes) that can be stored in this destination. The default value of -1 specifies that there is no WebLogic-imposed limit on the number of bytes that can be stored in the destination. However, excessive bytes volume can cause memory saturation, so this value should correspond to the total amount of available system memory relative to the rest of your application load.

Range of Values: >= BytesThresholdHigh

This attribute is dynamically configurable, but only incoming messages are impacted; stored messages are not impacted.

Note: If a JMS template is used for distributed destination members, then this setting applies only to those specific members and not the distributed destination set as a whole.

MBean: weblogic.management.
configuration.
JMSQueueMBean

Attribute: BytesMaximum

Minimum: -1

Maximum: 9223372036854775807

Default: -1

Dynamic: yes

Bytes Threshold High

The upper threshold value that triggers events based on the number of bytes stored in the destination. If the number of bytes exceeds this threshold, the triggered events are:

• Log Messages - A message is logged on the server indicating a high threshold condition.

• Bytes Paging - If bytes paging is enabled (and a paging store has been configured), then destination-level bytes paging is started.

• Flow Control - If flow control is enabled, the destination becomes armed and instructs producers to begin decreasing their message flow.

A value of -1 specifies that bytes paging, flow control, and threshold log messages are disabled for the destination.

Range of Values: <= BytesMaximum; >BytesThresholdLow

This attribute is dynamically configurable, but only incoming messages are impacted; stored messages are not impacted.

Note: Bytes paging cannot be dynamically disabled by resetting the value to -1. To dynamically disable paging, you could set the value to a very large number, so that paging would not be triggered.

MBean: weblogic.management.
configuration.
JMSQueueMBean

Attribute: BytesThresholdHigh

Minimum: -1

Maximum: 9223372036854775807

Default: -1

Dynamic: yes

Bytes Threshold Low

The lower threshold value that triggers events based on the number of bytes stored in the destination. If the number of bytes falls below this threshold, the triggered events are:

• Log Messages - A message is logged on the server indicating that the threshold condition has cleared.

• Bytes Paging - If bytes paging is enabled, paging is stopped (if paging is occurring).

• Flow Control - If flow control is enabled, the destination becomes disarmed and instructs producers to begin increasing their message flow.

Range of Values: < BytesThresholdHigh

This attribute is dynamically configurable, but only incoming messages are impacted; stored messages are not impacted.

MBean: weblogic.management.
configuration.
JMSQueueMBean

Attribute: BytesThresholdLow

Minimum: -1

Maximum: 9223372036854775807

Default: -1

Dynamic: yes

Bytes Paging Enabled

Specifies whether bytes paging is enabled on the destination for temporarily swapping message bodies out from memory to a persistent paging store when the destination's message load reaches a specified bytes/messages threshold.

• default - If a JMS template is specified, then this value inherits the template's Bytes Paging value. If no JMS template is configured for the destination, then the Default value is equivalent to false.

• false - Bytes paging is explicitly disabled for this destination.

• true - If a paging store has been configured for the JMS server, and both the BytesThresholdLow and BytesThresholdHigh attribute values are greater than -1, then bytes paging is enabled for this destination.

MBean: weblogic.management.
configuration.
JMSQueueMBean

Attribute: BytesPagingEnabled

Default: default

Valid values:

• default

• false

• true

Messages Maximum

The maximum message quota (total amount of messages) that can be stored in this destination. The default value of -1 specifies that there is no WebLogic-imposed limit on the number of messages that can be stored in the destination. However, excessive message volume can cause memory saturation, so this value should correspond to the total amount of available system memory relative to the rest of your application load.

Range of Values: >= MessagesThresholdHigh

This attribute is dynamically configurable, but only incoming messages are impacted; stored messages are not impacted.

Note: If a JMS template is used for distributed destination members, then this setting applies only to those specific members and not the distributed destination set as a whole.

MBean: weblogic.management.
configuration.
JMSQueueMBean

Attribute: MessagesMaximum

Minimum: -1

Maximum: 9223372036854775807

Default: -1

Dynamic: yes

Messages Threshold High

The upper threshold value that triggers events based on the number of messages stored in the destination. If the number of messages exceeds this threshold, the triggered events are:

• Log Messages - A message is logged on the server indicating a high threshold condition.

• Bytes Paging - If messages paging is enabled (and a paging store has been configured), then destination-level messages paging is started.

• Flow Control - If flow control is enabled, the destination becomes armed and instructs producers to begin decreasing their message flow.

A value of -1 specifies that messages paging, flow control, and threshold log messages are disabled for the destination.

Range of Values: <= MessagesMaximum; >MessagesThresholdLow

This attribute is dynamically configurable, but only incoming messages are impacted; stored messages are not impacted.

Note: Messages paging cannot be dynamically disabled by resetting the the value to -1. To dynamically disable paging, you could set the value to a very large number, so that paging would not be triggered.

MBean: weblogic.management.
configuration.
JMSQueueMBean

Attribute: MessagesThresholdHigh

Minimum: -1

Maximum: 9223372036854775807

Default: -1

Dynamic: yes

Messages Threshold Low

The lower threshold value that triggers events based on the number of messages stored in the destination. If the number of messages falls below this threshold, the triggered events are:

• Log Messages - A message is logged on the server indicating that the threshold condition has cleared.

• Bytes Paging - If messages paging is enabled, paging is stopped (if paging is occurring).

• Flow Control - If flow control is enabled, the destination becomes disarmed and instructs producers to begin increasing their message flow.

Range of Values: < MessagesThresholdHigh

This attribute is dynamically configurable, but only incoming messages are impacted; stored messages are not impacted.

MBean: weblogic.management.
configuration.
JMSQueueMBean

Attribute: MessagesThresholdLow

Minimum: -1

Maximum: 9223372036854775807

Default: -1

Dynamic: yes

Messages Paging Enabled

Specifies whether messages paging is enabled on the destination for temporarily swapping message bodies out from memory to a persistent paging store when the destination's message load reaches a specified bytes/messages threshold.

• default - If a JMS template is specified, then this value inherits the template's Messages Paging value. If no JMS template is configured for the destination, then the Default value is equivalent to false.

• false - Messages paging is explicitly disabled for this destination.

• true - If a paging store has been configured for the JMS server, and both the MessagesThresholdLow and MessagesThresholdHigh attribute values are greater than -1, then messages paging is enabled for this destination.

MBean: weblogic.management.
configuration.
JMSQueueMBean

Attribute: MessagesPagingEnabled

Default: default

Valid values:

• default

• false

• true

Maximum Message Size

The maximum size of a message that will be accepted from producers on this destination. The message size includes the message body, any user-defined properties, and the user-defined JMS header fields: JMSCorrelationID and JMSType. Producers sending messages that exceed the configured maximum message size for the destination receive a ResourceAllocationException.

The maximum message size is only enforced for the initial production of a message. Messages that are redirected to an error destination or forwarded to a member of a distributed destination are not checked for size. For instance, if a destination and its corresponding error destination are configured with a maximum message size of 128K bytes and 64K bytes, respectively, a message of 96K bytes could be redirected to the error destination (even though it exceeds the 64K byte maximum), but a producer could not directly send the 96K byte message to the error destination.

This attribute is dynamically configurable, but only incoming messages are impacted; stored messages are not impacted.

MBean: weblogic.management.
configuration.
JMSQueueMBean

Attribute: MaximumMessageSize

Minimum: 0

Maximum: 2147483647

Default: 2147483647

Dynamic: yes