Troubleshooting Disk Latency

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You can view disk latency alerts from the Management tab. NSX Controllers must operate on disks with low latency.

View Disk Latency Alerts
Disk latency alerts monitors and reports disk availability or latency issues. You can view disk latency details for each NSX Controller. The read latency and write latency calculations are inputted into a 5-second (by default) moving average, which in turn is used to trigger an alert upon breaching the latency limit. The alert is turned off after the average comes down to the low watermark. By default, the high watermark is set to 200 ms, and the low watermark is set to 100 ms. High latencies impacts the operation of the distributed clustering applications on each controller node.
Disk Latency Issues
The controllers must operate on disks with low latency. The cluster requires disk storage system for each node to have a peak write latency of less than 300 ms, and a mean write latency of less than 100 ms.

Parent topic: Troubleshooting NSX Controller

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