Readme updates

Author: robsunday

instrumentation/jmx-metrics/README.md

@@ -29,7 +29,7 @@ No targets are enabled by default. The supported target environments are listed
 - [camel](javaagent/camel.md)
 - [jetty](javaagent/jetty.md)
 - [kafka-broker](javaagent/kafka-broker.md)
-- [tomcat](javaagent/tomcat.md)
+- [tomcat](library/tomcat.md)
 - [wildfly](javaagent/wildfly.md)
 - [hadoop](javaagent/hadoop.md)
 

instrumentation/jmx-metrics/library/tomcat.md

@@ -2,12 +2,13 @@
 
 Here is the list of metrics based on MBeans exposed by Tomcat.
 
-| Metric Name                    | Type          | Attributes                                          | Description                             |
-|--------------------------------|---------------|-----------------------------------------------------|-----------------------------------------|
-| tomcat.active_session.count    | UpDownCounter | tomcat.context                                      | The number of active sessions.          |
-| tomcat.error.count             | Counter       | tomcat.request_processor.name                       | The number of errors.                   |
-| tomcat.request.count           | Counter       | tomcat.request_processor.name                       | The number of requests processed.       |
-| tomcat.request.duration.max    | Gauge         | tomcat.request_processor.name                       | The longest request processing time.    |
-| tomcat.request.processing_time | Counter       | tomcat.request_processor.name                       | Total time for processing all requests. |
-| tomcat.network.io              | Counter       | tomcat.request_processor.name, network.io.direction | The number of bytes transmitted.        |
-| tomcat.thread.count            | UpDownCounter | tomcat.thread_pool.name, tomcat.thread.state        | Thread Count of the Thread Pool         |
+| Metric Name                    | Type          | Attributes                                          | Description                                 |
+|--------------------------------|---------------|-----------------------------------------------------|---------------------------------------------|
+| tomcat.active_session.count    | UpDownCounter | tomcat.context                                      | The number of active sessions.              |
+| tomcat.error.count             | Counter       | tomcat.request_processor.name                       | The number of errors.                       |
+| tomcat.request.count           | Counter       | tomcat.request_processor.name                       | The number of requests processed.           |
+| tomcat.request.duration.max    | Gauge         | tomcat.request_processor.name                       | The longest request processing time.        |
+| tomcat.request.processing_time | Counter       | tomcat.request_processor.name                       | Total time for processing all requests.     |
+| tomcat.network.io              | Counter       | tomcat.request_processor.name, network.io.direction | The number of bytes transmitted.            |
+| tomcat.thread.count            | UpDownCounter | tomcat.thread_pool.name                             | Total thread count of the thread pool.      |
+| tomcat.thread.busy.count       | UpDownCounter | tomcat.thread_pool.name                             | Number of busy threads in the thread pool.  |