16 Apache Tomcat Metrics
The Apache Tomcat metrics provide for each metric the following information:
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Description
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Metric summary— The metric summary can include some or all of the following: target version, evaluation frequency, collection frequency, upload frequency, operator, default warning threshold, default critical threshold, consecutive number of occurrences preceding notification, and alert text.
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Multiple Thresholds (where applicable).
To download and monitor the Apache Tomcat plug-in, see Enterprise Manager System Monitoring Plug-in Installation Guide for Apache Tomcat.
All Applications
This metric category contains aggregated performance metrics spanning all the applications deloyed to the Apache Tomcat container.
All Applications - Rejected Sessions
This metric shows the number of sessions rejected by all the applications running on the Apache Tomcat container since last collection.
Target Version | Collection Frequency |
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Apache Tomcat 7.x and earlier |
Every 5 minutes |
Apache Tomcat 8.x |
Every 5 minutes |
All Applications - Sessions Created
This metric shows the number of sessions created by all the applications running on the Apache Tomcat container since the last collection.
Target Version | Collection Frequency |
---|---|
Apache Tomcat 7.x and earlier |
Every 5 minutes |
Apache Tomcat 8.x |
Every 5 minutes |
All Applications JSP Monitor Metrics
This metric category contains aggregated performance metrics spanning all the JavaServer Pages (JSPs) deployed to the Apache Tomcat container.
All Applications - JSP Access
This metric shows the number of times JSPs were accessed on all the applications since last collection.
Target Version | Collection Frequency |
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Apache Tomcat 7.x and earlier |
Every 5 minutes |
Apache Tomcat 8.x |
Every 5 minutes |
All Global Request Processors Metrics
This metric category contains aggregated performance metrics spanning all the Global Request Processors deployed to the Apache Tomcat container.
All Global Request Processors - Total Bytes Received
This metric shows the bytes received by all the request processors running on the Apache Tomcat container since last collection.
Target Version | Collection Frequency |
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Apache Tomcat 7.x and earlier |
Every 5 minutes |
Apache Tomcat 8.x |
Every 5 minutes |
All Global Request Processors - Total Errors
This metric shows the error count on all the request processors running on the Apache Tomcat container since last collection.
Target Version | Collection Frequency |
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Apache Tomcat 7.x and earlier |
Every 5 minutes |
Apache Tomcat 8.x |
Every 5 minutes |
All Global Request Processors - Total Requests
This metric shows the request count on all the request processors running on the Apache Tomcat container since last collection.
Target Version | Collection Frequency |
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Apache Tomcat 7.x and earlier |
Every 5 minutes |
Apache Tomcat 8.x |
Every 5 minutes |
Application Cache Metrics
This metric category contains the usage details of the application cache of the Apache Tomcat container.
Cache Access Count
This metric shows the number of times the cache was accessed since last collection.
Target Version | Collection Frequency |
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Apache Tomcat 7.x and earlier |
Every 5 minutes |
Apache Tomcat 8.x |
Every 5 minutes |
Applications Metrics
This metric category contains the metrics for each application deployed to the container.
Application Name
This metric shows the deployed application names.
Target Version | Collection Frequency |
---|---|
Apache Tomcat 7.x and earlier |
Every 5 minutes |
Active Sessions
This metric shows the number of Active Sessions.
Target Version | Collection Frequency |
---|---|
Apache Tomcat 7.x and earlier |
Every 5 minutes |
Processing Time (sec)
This metric shows the average time taken (in seconds) for processing a request.
Target Version | Collection Frequency |
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Apache Tomcat 7.x and earlier |
Every 5 minutes |
Rejected Sessions (per min)
This metric shows the number of sessions rejected by all applications per minute.
Target Version | Collection Frequency |
---|---|
Apache Tomcat 7.x and earlier |
Every 5 minutes |
Sessions Created (per min)
This metric shows the number of sessions created by all applications per minute .
Target Version | Collection Frequency |
---|---|
Apache Tomcat 7.x and earlier |
Every 5 minutes |
DataSource Metrics
This metric category contains the attributes of all the data sources configured for the Apache Tomcat container.
Active Datasource Connections
This metric shows the number of active connections to the data source.
Target Version | Collection Frequency |
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Apache Tomcat 7.x and earlier |
Every 5 minutes |
Apache Tomcat 8.x |
Every 5 minutes |
Global Request Processor Metrics
This metric category contains the attributes of each Global Request Processor configured on the Apache Tomcat container.
Average Request Processing Time (sec)
This metric shows the average time taken (in seconds) for processing a request by the global request processor.
Target Version | Collection Frequency |
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Apache Tomcat 7.x and earlier |
Every 5 minutes |
Bytes received (per min)
This metric shows the number of bytes received by each request processor per minute.
Target Version | Collection Frequency |
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Apache Tomcat 7.x and earlier |
Every 5 minutes |
Bytes Sent (per min)
This metric shows the number of bytes sent by each request processor per minute.
Target Version | Collection Frequency |
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Apache Tomcat 7.x and earlier |
Every 5 minutes |
Errors (per min)
This metric shows the error count of each request processor per minute.
Target Version | Collection Frequency |
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Apache Tomcat 7.x and earlier |
Every 5 minutes |
JSP Monitor Metrics
This metric category contains the usage details of JSPs.
JSP Access (per min)
This metric shows the number of times JSPs were accessed since during the last collection.
Target Version | Collection Frequency |
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Apache Tomcat 7.x and earlier |
Every 5 minutes |
Apache Tomcat 8.x |
Every 5 minutes |
JVM Garbage Collector
This metric category provides information about JVM Garbage Collectors.
Garbage Collector - Duration of last Garbage Collection (ms)
This metric indicates the number of milliseconds that the JVM pent on the last garbage collection ended during the last collection interval.
Target Version | Collection Frequency |
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Apache Tomcat 7.x and earlier |
Every 15 minutes |
Garbage Collector - Invocation Time (ms)
This metric indicates the number of milliseconds that the JVM has spent on all garbage collection runs during last collection interval.
Target Version | Collection Frequency |
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Apache Tomcat 7.x and earlier |
Every 15 minutes |
Apache Tomcat 8.x |
Every 15 minutes |
Garbage Collector - Invocation Rate (per min)
This metric indicates the rate at which the garbage collections happened during the last collection interval.
Target Version | Collection Frequency |
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Apache Tomcat 7.x and earlier |
Every 15 minutes |
Apache Tomcat 8.x |
Every 15 minutes |
JVM Heap Memory Pool after GC
This metric category provides information about the JVM Heap Memory Pool memory usage metrics after garbage collection.
Memory usage after GC (MB)
This metric displays the amount of memory used by the memory pool after the garbage collection (MB).
Target Version | Collection Frequency |
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Apache Tomcat 7.x and earlier |
Every 15 minutes |
Apache Tomcat 8.x |
Every 15 minutes |
JVM Memory Pools
This metric provides information about the metrics for memory usage in the JVM memory pools.
Memory Pool - Type
This metric displays the type of the JVM memory pool.
Target Version | Collection Frequency |
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Apache Tomcat 7.x and earlier |
Every 15 minutes |
Apache Tomcat 8.x |
Every 15 minutes |
Memory Pool - Current Usage (MB)
This metric displays the amount of memory currently used in the JVM memory pool.
Target Version | Collection Frequency |
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Apache Tomcat 7.x and earlier |
Every 15 minutes |
Apache Tomcat 8.x |
Every 15 minutes |
Memory Pool - Percentage Usage (%)
This metric displays the current memory usage percentage with respect to the maximum memory available in the memory pool (%).
Target Version | Collection Frequency |
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Apache Tomcat 7.x and earlier |
Every 15 minutes |
Apache Tomcat 8.x |
Every 15 minutes |
JVM Threads
This metric category provides information about the JVM Threads metrics.
JVM Threads - Active Threads
This metric displays the number of active threads running in the JVM.
Target Version | Collection Frequency |
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Apache Tomcat 7.x and earlier |
Every 15 minutes |
Apache Tomcat 8.x |
Every 15 minutes |
JVM Threads - Peak Threads
This metric displays the maximum number of active threads running at any time in the JVM.
Target Version | Collection Frequency |
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Apache Tomcat 7.x and earlier |
Every 15 minutes |
Apache Tomcat 8.x |
Every 15 minutes |
JVM Threads - Active Daemon Threads
This metric displays the number of Daemon threads running in the JVM.
Target Version | Collection Frequency |
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Apache Tomcat 7.x and earlier |
Every 15 minutes |
Apache Tomcat 8.x |
Every 15 minutes |
Memory Usage
This metric category provides information about memory usage metrics.
JVM Heap Memory Usage (MB)
This metric displays the amount of memory (in MB) used in the heap.
Target Version | Collection Frequency |
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Apache Tomcat 7.x and earlier |
Every 5 minutes |
Apache Tomcat 8.x |
Every 5 minutes |
JVM Total Heap Memory Usage (MB)
This metric displays the maximum amount (in MB) of heap memory available for the JVM.
Target Version | Collection Frequency |
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Apache Tomcat 7.x and earlier |
Every 5 minutes |
Apache Tomcat 8.x |
Every 5 minutes |
JVM Non-Heap Memory Usage (MB)
This metric displays the amount of memory (in MB) being used in the non-heap.
Target Version | Collection Frequency |
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Apache Tomcat 7.x and earlier |
Every 5 minutes |
Apache Tomcat 8.x |
Every 5 minutes |
JVM Total Non-Heap Memory Usage (MB)
This metric displays the maximum amount of non-heap memory (in MB) available for the JVM.
Target Version | Collection Frequency |
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Apache Tomcat 7.x and earlier |
Every 5 minutes |
Apache Tomcat 8.x |
Every 5 minutes |
JVM Heap Memory Usage (%)
This metric displays the current heap memory percentage with respect to the maximum heap memory available.
Target Version | Collection Frequency |
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Apache Tomcat 7.x and earlier |
Every 5 minutes |
Apache Tomcat 8.x |
Every 5 minutes |
JVM Non-Heap Memory Usage (%)
This metric displays the current non-heap memory percentage with respect to the maximum non-heap memory available.
Target Version | Collection Frequency |
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Apache Tomcat 7.x and earlier |
Every 5 minutes |
Apache Tomcat 8.x |
Every 5 minutes |
Session Manager Metrics
This metric category contains the statistics of the sessions managed by the Apache Tomcat container.
Rejected Sessions (per min)
This metric shows the active number of of sessions rejected per minute.
Target Version | Collection Frequency |
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Apache Tomcat 7.x and earlier |
Real-time only |
Sessions Created (per min)
This metric shows the number of sessions created per minute.
Target Version | Collection Frequency |
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Apache Tomcat 7.x and earlier |
Real-time only |
Thread Pools Metrics
This metric category contains statistics on various thread pools used by the Apache Tomcat container.
Busy Threads
This metric shows the number of busy threads on the Apache Tomcat container.
Target Version | Collection Frequency |
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Apache Tomcat 7.x and earlier |
Every 5 minutes |
Apache Tomcat 8.x |
Every 5 minutes |