# Tomcat Metrics Here is the list of metrics based on MBeans exposed by Tomcat. | Metric Name | Type | Attributes | Description | |--------------------------------------------|---------------|-----------------|-----------------------------------------------------------------| | http.server.tomcat.sessions.activeSessions | UpDownCounter | context | The number of active sessions | | http.server.tomcat.errorCount | Gauge | name | The number of errors per second on all request processors | | http.server.tomcat.requestCount | Gauge | name | The number of requests per second across all request processors | | http.server.tomcat.maxTime | Gauge | name | The longest request processing time | | http.server.tomcat.processingTime | Counter | name | Represents the total time for processing all requests | | http.server.tomcat.traffic | Counter | name, direction | The number of bytes transmitted | | http.server.tomcat.threads | UpDownCounter | name, state | Thread Count of the Thread Pool |