MSMQ Queue Length

The MSMQ Queue Length check monitors how many messages sit in the Microsoft Message Queuing (MSMQ) queues of a Windows device and alerts when messages back up beyond the thresholds. It reads the Windows performance counter \MSMQ Queue(*)\Messages in Queue on the device you assign it to. The check runs on Windows only (x64 and Arm64), every 5 minutes by default, and measures the message count at execution time.

Prerequisites

• Microsoft Message Queuing (MSMQ) is installed on the device and provides the MSMQ Queue performance counter.

Steps

1. Go to Devices and open the device.
2. Click the Checks tab → Add Check → MSMQ Queue Length.

Settings

The pattern must match the full name as the performance counter reports it. Put * before and after the part you are looking for if you only know part of the name.

Results

Each queue is evaluated separately; the overall result is the worst status across all monitored queues.

Thresholds also trigger on equality. If Warning message count is greater than Error message count, the check swaps the two values before evaluation. Reading the performance counter has a fixed 30-second timeout.

Metrics collected

• Name of each monitored queue
• Number of messages per queue
• Result per queue