1Java - DTracing Java 2 3 These scripts trace the JVM, and require the Java hotspot provider which 4 was shipped with Java starting with version 1.6.0. 5 6 Some of these scripts measure method and object events, and require 7 the Java process to be run using the "+ExtendedDTraceProbes" flag. 8 For example, 9 10 java -XX:+ExtendedDTraceProbes classfile 11 12 The ExtendedDTraceProbes flag is not on by default to avoid the additional 13 overhead for maintaining these additional probes. When this flag is 14 enabled, the JVM may execute slightly slower than before; when the probes 15 are also enabled (especially method probes), the JVM may execute 16 significantly slower. 17 18