APM Metric Data

The APM metric data is calculated based on the reported trace details and is used to measure the health status of the application from a statistical point of view. It mainly includes two types of indicators:

• Request quantity: including total amount, failure amount, and success rate.
• Request latency: including average latency and latency quantile.

Data Pre-aggregation

It is inefficient to compute aggregated data from the vast amount of trace details each time. It takes time to respond quickly, especially in scenarios with high real-time requirements(e.g. alert calculation) or long-term queries (e.g. the latency trend of an interface in the past week).

HoloInsight adopts the pre-aggregation method to aggregate trace details into materialized metric data in advance and write them into the time-series database, improving query performance and timeliness and providing conditions for long-term retention of trend data.