Before You Start

This document describes how to use Application Performance Management (APM).

Topology	The call and dependency relationships between applications are displayed, and abnormal instances can be automatically discovered.
Call Chain	Information such as the call status, duration, and API is displayed, helping you further locate fault causes.
Transactions	Key metrics of transactions are displayed and Application Performance Index (Apdex) values intuitively reflect users' satisfaction with applications. When a transaction is abnormal, an alarm is reported. For transactions with poor user experience, faults can be located based on topology and tracing.
Method Tracing	Developers are able to locate method-level performance problems online.
SQL Analysis	Abnormal SQL statements are analyzed to solve database performance problems. The topology displays the key metrics of databases and SQL statements.
JVM Monitoring	The memory and thread metrics of the JVM running environment are monitored in real time, enabling you to quickly detect problems such as memory leakage and thread exceptions. The topology displays the JVM metrics of instances. When a JVM metric is abnormal, an alarm is reported.