Hi all!
Sometime ago I enquired about the existence of a probe that would give
information on a running Java Virtual Machine (JVM). Unfortunately it's
a Linux only probe (for now at least).
Now I am happy to present to the community a probe developed in C that
can monitors a JVM and report to a gmond. It's publishing of metrics is
similar to that of gmetric.
It works by parsing the info at /proc/pid/status of the Linux tasks
relevant to the JVM (depending on the kernel the status file reports
just one process with threads or a set of tasks that represent
process/threads).
Although this probe is now used for monitoring Java services it can be
used to monitor any other kind of process that has a long time span.
It's a kind of process oriented metrics.
It was done in C for the usual question on intrusiveness. Memory
footprint is around 1.5 Mb Vss and it uses 0.1% of the CPU with 10
seconds of interval between samples.
This probe can be downloaded at:
http://student.dei.uc.pt/~mtavares/index.php?content=software
Installation requires ganglia to be installed using the source code.
I would be glad to hear comments, bug reports and, even better, to
receive patches.
Miguel Tavares
--
"Until they become conscious they will never rebel,
and until after they have rebelled they cannot become conscious."
- George Orwell's 1984 -
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