1 .TH j_stat.d 1m "$Date:: 2007-10-03 #$" "USER COMMANDS"
3 j_stat.d - Java operation stats using DTrace.
8 This traces activity from all Java processes on the system with hotspot
9 provider support (1.6.0). Method calls and object allocation are only
10 visible when using the flag "+ExtendedDTraceProbes". eg,
11 java -XX:+ExtendedDTraceProbes classfile
13 The numbers are counts for the interval specified. The default interval
16 If you see a count in "EXECS" but not in the other columns, then your
17 Java software is probably not running with the DTrace hotspot provider.
19 If you see counts in "CLOAD" but not in "METHODS", then you Java
20 software probably isn't running with "+ExtendedDTraceProbes".
24 Evolving - uses the DTrace hotspot provider, which may change
25 as additional features are introduced. Check Java/Readme
26 to see what version these scripts are based on.
36 Java programs executed per second, including
37 those without Java provider support
40 Methods called, per second
43 Objects created, per second
46 Class loads, per second
49 Exceptions raised, per second
55 Garbage collects, per second
58 See the DTraceToolkit for further documentation under the
59 Examples, Notes and Docs directories. The example files may be
60 especially useful as they aim to demonstrate how to interpret
63 j_stat.d will run until Ctrl-C is hit.