This topic describes the following metrics that are available in the Simple Message Queue (formerly MNS) (SMQ) console: message count, number of messages visible, and number of messages delayed.
The following metrics are used to summarize different types of messages:
message count: the total number of messages, including the messages that are sent and are not sent.
number of messages visible: the number of messages that are not processed.
number of messages delayed: the number of messages for which the DelaySeconds parameter is configured.