DocumentationJava Profiler 10 HelpProbes: extendable profiling and monitoringBuilt-in probes

We have prepared a set of probes to help investigating typical problems. The probes are ready to use out-of-the-box. Also you can use them as good examples to start with should you decide creating custom probes.

The following built-in probes are available at the moment:

• Threads:
  • com.yourkit.probes.builtin.Threads - monitor thread creation, start, name change
• Processes:
  • com.yourkit.probes.builtin.Processes - monitor launched processes
• Class loading:
  • Class loading - monitor class load and unload events
• File I/O:
  • com.yourkit.probes.builtin.FileStreams - monitor file stream-based I/O operations
  • com.yourkit.probes.builtin.FileChannels - monitor file NIO channel-based operations
  • com.yourkit.probes.builtin.RandomAccessFiles - monitor java.io.RandomAccessFile I/O operations
• Socket I/O:
  • com.yourkit.probes.builtin.Sockets - monitor socket I/O operations
• Database:
  • com.yourkit.probes.builtin.Databases - monitor JDBC/SQL activity
• JSP/Servlet:
  • com.yourkit.probes.builtin.Servlets - monitor JSP/Servlet request processing
• Other:
  • com.yourkit.probes.builtin.JUnitTests - monitor execution of JUnit tests
  • com.yourkit.probes.builtin.AWTEvents - record long AWT/Swing events, which cause UI irresponsiveness

Also, package com.yourkit.probes.builtin contains classes which are not probe classes nor contain probe classes, but instead provide some useful functionality:

• com.yourkit.probes.builtin.Messages - provides utility method to log arbitrary text messages

Registering built-in probes

Use the following startup options to control which built-in probes should be registered on startup:

• builtinprobes=all - all built-in probes (default behavior)
• builtinprobes=none - none of the built-in probes

To register particular probe(s) only, use the following sequence:

builtinprobes=none,probe=class_A[,probe=class_B...]

Note that for the built-in probes you do not have to specify class path with probeclasspath or probebootclasspath options. The profiler agent contains the built-in probe classes and handles their loading.

You can also register built-in probes by name in runtime with the help of the API. Read more...