Azure Cache for Redis now offers an additional metric in Azure Monitor to measure the 99th percentile latency of server-side commands. This allows you to see the worst-case latency experienced by your Redis instance, which helps in debugging latency challenges in your application stack. You can also use this metric to help determine when long-running commands are increasing the response latency of your Redis instance. The 99th percentile latency metric is available in the basic, standard, and premium tiers of Azure Cache for Redis.
Learn more.