Tomcat JVM Overview

This dashboard display multiple JMX metrics from Tomcat. JMX needs to be enabled on the Tomcat instance.

This dashboard use https://github.com/egineering-llc/collectd-fast-jmx plugin. The configuration is a mix between multiple example confiugration files found on Internet:

LoadPlugin java
<Plugin "java">
  JVMARG "-Djava.class.path=/usr/share/collectd/java/collectd-api.jar:/usr/share/collectd/java/collectd-fast-jmx.jar"
LoadPlugin "com.e_gineering.collectd.FastJMX"
<Plugin "FastJMX">
MaxThreads 256
CollectInternal true
&lt;MBean &#34;classes&#34;&gt;
  ObjectName &#34;java.lang:type=ClassLoading&#34;

  &lt;Value &#34;LoadedClassCount&#34;&gt;
    Type &#34;gauge&#34;
    InstancePrefix &#34;loaded_classes&#34;
    PluginName &#34;JVM&#34;
  &lt;/Value&gt;
&lt;/MBean&gt;

# Time spent by the JVM compiling or optimizing.
&lt;MBean &#34;compilation&#34;&gt;
  ObjectName &#34;java.lang:type=Compilation&#34;

  &lt;Value &#34;TotalCompilationTime&#34;&gt;
    Type &#34;total_time_in_ms&#34;
    InstancePrefix &#34;compilation_time&#34;
    PluginName &#34;JVM&#34;
  &lt;/Value&gt;
&lt;/MBean&gt;

# Garbage collector information
&lt;MBean &#34;garbage_collector&#34;&gt;
  ObjectName &#34;java.lang:type=GarbageCollector,*&#34;
  InstancePrefix &#34;gc-&#34;
  InstanceFrom &#34;name&#34;

  &lt;Value &#34;CollectionTime&#34;&gt;
    Type &#34;total_time_in_ms&#34;
    InstancePrefix &#34;collection_time&#34;
    PluginName &#34;JVM&#34;
  &lt;/Value&gt;
&lt;/MBean&gt;
<MBean "memory_pool">
ObjectName "java.lang:type=MemoryPool,"
InstancePrefix "memory_pool-"
InstanceFrom "name"
<Value>
Type "memory"
Table true
Attribute "Usage"
</Value>
</MBean>
<MBean "memory-heap">
ObjectName "java.lang:type=Memory"
InstancePrefix "memory-heap"
<Value>
Type "memory"
Table true
Attribute "HeapMemoryUsage"
</Value>
</MBean>
<MBean "memory-nonheap">
ObjectName "java.lang:type=Memory"
InstancePrefix "memory-nonheap"
<Value>
Type "memory"
Table true
Attribute "NonHeapMemoryUsage"
</Value>
</MBean>
<MBean "thread">
ObjectName "java.lang:type=Threading"
InstancePrefix "threading"
<Value>
Type "gauge"
Table false
Attribute "ThreadCount"
InstancePrefix "count"
</Value>
</MBean>
<MBean "thread-daemon">
ObjectName "java.lang:type=Threading"
InstancePrefix "threading"
<Value>
Type "gauge"
Table false
Attribute "DaemonThreadCount"
InstancePrefix "count-daemon"
</Value>
</MBean>
### MBeans by Catalina / Tomcat ###
# The global request processor (summary for each request processor)
<MBean "catalina/global_request_processor">
ObjectName "Catalina:type=GlobalRequestProcessor,"
InstancePrefix "catalina_request_processor-"
InstanceFrom "name"
  &lt;Value&gt;
    Type &#34;io_octets&#34;
    InstancePrefix &#34;global&#34;
    #InstanceFrom &#34;&#34;
    Table false
    Attribute &#34;bytesReceived&#34;
    Attribute &#34;bytesSent&#34;
  &lt;/Value&gt;

  &lt;Value&gt;
    Type &#34;total_requests&#34;
    InstancePrefix &#34;global&#34;
    #InstanceFrom &#34;&#34;
    Table false
    Attribute &#34;requestCount&#34;
  &lt;/Value&gt;

  &lt;Value&gt;
    Type &#34;total_time_in_ms&#34;
    InstancePrefix &#34;global-processing&#34;
    #InstanceFrom &#34;&#34;
    Table false
    Attribute &#34;processingTime&#34;
  &lt;/Value&gt;
&lt;/MBean&gt;

&lt;MBean &#34;catalina/threadpool&#34;&gt;
  ObjectName &#34;Catalina:type=ThreadPool,*&#34;
  InstancePrefix &#34;catalina_threadpool-&#34;
  InstanceFrom &#34;name&#34;

  &lt;Value&gt;
    Type &#34;gauge&#34;
    Table false
    Attribute &#34;maxThreads&#34;
    InstancePrefix &#34;threadpool-maxThreads&#34;
  &lt;/Value&gt;
  &lt;Value&gt;
    Type &#34;gauge&#34;
    Table false
    Attribute &#34;connectionCount&#34;
    InstancePrefix &#34;threadpool-connectionCount&#34;
  &lt;/Value&gt;
&lt;/MBean&gt;

&lt;MBean &#34;tomcat_manager&#34;&gt;
     ObjectName &#34;Catalina:type=Manager,context=*,host=*&#34;
     InstanceFrom &#34;context&#34;
     &lt;Value&gt;
        Type &#34;gauge&#34;
        InstancePrefix &#34;manager-active_sessions&#34;
        Table false
        Attribute &#34;activeSessions&#34;
    &lt;/Value&gt;
&lt;/MBean&gt;

&lt;MBean &#34;jvm_runtime&#34;&gt;
  ObjectName &#34;java.lang:type=Runtime&#34;
  &lt;Value&gt;
    Type &#34;counter&#34;
    InstancePrefix &#34;runtime-uptime&#34;
    Table false
    Attribute &#34;Uptime&#34;
  &lt;/Value&gt;
&lt;/MBean&gt;

 &lt;MBean &#34;jvm_system&#34;&gt;
   ObjectName &#34;java.lang:type=OperatingSystem&#34;
   &lt;Value&gt;
     Type &#34;gauge&#34;
     InstancePrefix &#34;os-open_fd_count&#34;
     Table false
     Attribute &#34;OpenFileDescriptorCount&#34;
   &lt;/Value&gt;
   &lt;Value&gt;
     Type &#34;counter&#34;
     InstancePrefix &#34;os-process_cpu_time&#34;
     Table false
     Attribute &#34;ProcessCpuTime&#34;
   &lt;/Value&gt;
 &lt;/MBean&gt;
&lt;Connection&gt;
  ServiceURL &#34;service:jmx:rmi:///jndi/rmi://myserver:9090/jmxrmi&#34;
  Host &#34;myserver&#34;
  User &#34;myuser&#34;
  Password &#34;mypassword&#34;
  IncludePortInHostname true
  Collect &#34;classes&#34;
  Collect &#34;thread&#34;
  Collect &#34;thread-daemon&#34;
  Collect &#34;compilation&#34;
  Collect &#34;garbage_collector&#34;
  Collect &#34;memory_pool&#34;
  Collect &#34;memory-heap&#34;
  Collect &#34;memory-nonheap&#34;
  Collect &#34;catalina/global_request_processor&#34;
  Collect &#34;catalina/threadpool&#34;
  Collect &#34;jvm_system&#34;
  Collect &#34;jvm_runtime&#34;
  Collect &#34;tomcat_manager&#34;
&lt;/Connection&gt;
</Plugin>
</Plugin>