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34 lines
1.6 KiB
Plaintext
34 lines
1.6 KiB
Plaintext
The following are examples of running j_stat.d.
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j_stat.d shows you the number of events per second that have happened since
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the last line output. The default interval is 1 second, but you can specify
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other intervals as arguments to the script.
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This shows the j_stat.d script reflecting the Code/Ruby/Func_abc script.
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# j_stat.d
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TIME EXEC/s THREAD/s METHOD/s OBJNEW/s CLOAD/s EXCP/s GC/s
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2007 Sep 24 04:00:34 0 0 0 0 0 0 0
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2007 Sep 24 04:00:35 2 6 11660 5306 318 41 0
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2007 Sep 24 04:00:36 0 0 124 4 0 2 0
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2007 Sep 24 04:00:37 0 0 124 4 0 2 0
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2007 Sep 24 04:00:38 0 0 123 75 9 1 0
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2007 Sep 24 04:00:39 0 0 0 0 0 0 0
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2007 Sep 24 04:00:40 0 0 0 0 0 0 0
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^C
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Here we can see that at 2007 Sep 24 04:00:35 there were 2 Java programs
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executed, (this number will include those without Java provider support),
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there were 6 threads created, 11,660 methods called, 5306 new objects created,
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318 class loads, 41 exceptions raised and no garbage collects.
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The numbers are per second counts for the interval specified. The default
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interval is 1 second.
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If you see a count in "EXECS" but not in the other columns, then your Java
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software is probably not running with the DTrace hotspot provider.
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If you see counts in "CLOAD" but not in "METHODS", then you Java software
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probably isn't running with "+ExtendedDTraceProbes".
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