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DMS Metrics

Table 1 DMS metrics

Metric

Description

Value Range

Monitored Object

Monitoring Period (Raw Data)

Queued Messages

Current number of messages in a queue

Messages older than 72 hours will be deleted from a queue and deleted messages are not counted into the metric. Dead letter messages Dead letter messages are specific to consumer groups and stored in dead letter queues. Therefore, generation and expiry of dead letter messages do not affect the metric.

≥ 0

DMS queue

1 minute

Message Size

Total size of messages sent to a queue during the previous one minute

This metric gives you an overview of message load flowing into a queue.

Unit: byte

≥ 0 bytes

DMS queue

1 minute

Request Count

Total number of requests sent to a queue during the previous one minute

≥ 0

DMS queue

1 minute

Accumulated Messages

Current number of messages that are not retrieved by a consumer group

Dead letter messages older than 72 hours will be deleted from a queue. Once deleted, dead letter messages can no longer be retrieved by a consumer group and therefore they are not counted into the metric.

Dead letter messages are flagged as retrieved messages and therefore not counted into the metric.

≥ 0

DMS consumer group

1 minute

Retrieved Messages

Accumulated number of messages retrieved by a consumer group since the consumer group is created

Dead letter messages are counted into the metric because dead letter messages are flagged as retrieved messages.

The count of skipped messages is accumulated since a consumer group is created.

≥ 0

DMS consumer group

1 minute

Skipped Messages

Accumulated number of messages that are deleted and never retrieved

The count of skipped messages is accumulated since a consumer group is created.

Messages older than 72 hours will be deleted from a queue. Deleted messages can no longer be retrieved by a consumer group.

≥ 0

DMS consumer group

1 minute

Available Dead Letter Messages

Current number of dead letter messages that are not retrieved by a consumer group

Dead letter messages older than 72 hours will be deleted from a queue. Once deleted, dead letter messages can no longer be retrieved by a consumer group and therefore they are not counted into the metric.

≥ 0

DMS consumer group

1 minute

Historical Dead Letter Messages

Accumulated number of dead letter messages that have been generated for a consumer group since the consumer group is created

The count of historical dead letter messages includes the retrieved dead letter messages, remaining dead letter messages, and expired dead letter messages.

≥ 0

DMS consumer group

1 minute