jvmtop is a lightweight console application to monitor all accessible, running jvms on a machine.
In a top-like manner, it displays JVM internal metrics (e.g. memory information) of running java processes.
Jvmtop does also include a CPU console profiler.
It's tested with different releases of Oracle JDK, IBM JDK and OpenJDK on Linux, Solaris, FreeBSD and Windows hosts.
Jvmtop requires a JDK - a JRE will not suffice.
Please note that it's currently in an alpha state -
if you experience an issue or need further help, please let us know.
Jvmtop is open-source. Checkout the source code. Patches are very welcome!
Also have a look at the documentation or at a captured live-example.
JvmTop 0.8.0 alpha amd64 8 cpus, Linux 2.6.32-27, load avg 0.12
https://github.com/patric-r/jvmtop
PID MAIN-CLASS HPCUR HPMAX NHCUR NHMAX CPU GC VM USERNAME #T DL
3370 rapperSimpleApp 165m 455m 109m 176m 0.12% 0.00% S6U37 web 21
11272 ver.resin.Resin [ERROR: Could not attach to VM]
27338 WatchdogManager 11m 28m 23m 130m 0.00% 0.00% S6U37 web 31
19187 m.jvmtop.JvmTop 20m 3544m 13m 130m 0.93% 0.47% S6U37 web 20
16733 artup.Bootstrap 159m 455m 166m 304m 0.12% 0.00% S6U37 web 46
Click on the releases tab, download the most recent tar.gz archive. Extract it, ensure that the `JAVA_HOME` environment variable points to a valid JDK and run `./jvmtop.sh`.
Further information can be found in the [INSTALL file](https://github.com/patric-r/jvmtop/blob/master/INSTALL) Changes:
- improved attach compatibility for all IBM jvms
- fixed wrong CPU/GC values for IBM J9 jvms
- in case of unsupported heap size metric retrieval, n/a will be displayed instead of 0m
- improved argument parsing, support for short-options, added help (pass
--help), see issue #28 (now using the great jopt-simple library)
- when passing the
--onceoption, terminal will not be cleared anymore (see issue #27)
- improved shell script for guessing the path if a
JAVA_HOMEenvironment variable is not present (thanks to Markus Kolb)
In VM detail mode it shows you the top CPU-consuming threads, beside detailed metrics:
JvmTop 0.8.0 alpha amd64, 4 cpus, Linux 2.6.18-34
https://github.com/patric-r/jvmtop
PID 3539: org.apache.catalina.startup.Bootstrap
ARGS: start
VMARGS: -Djava.util.logging.config.file=/home/webserver/apache-tomcat-5.5[...]
VM: Sun Microsystems Inc. Java HotSpot(TM) 64-Bit Server VM 1.6.0_25
UP: 869:33m #THR: 106 #THRPEAK: 143 #THRCREATED: 128020 USER: webserver
CPU: 4.55% GC: 3.25% HEAP: 137m / 227m NONHEAP: 75m / 304m
TID NAME STATE CPU TOTALCPU BLOCKEDBY
25 http-8080-Processor13 RUNNABLE 4.55% 1.60%
128022 RMI TCP Connection(18)-10.101. RUNNABLE 1.82% 0.02%
36578 http-8080-Processor164 RUNNABLE 0.91% 2.35%
36453 http-8080-Processor94 RUNNABLE 0.91% 1.52%
27 http-8080-Processor15 RUNNABLE 0.91% 1.81%
14 http-8080-Processor2 RUNNABLE 0.91% 3.17%
128026 JMX server connection timeout TIMED_WAITING 0.00% 0.00%
Pull requests / bug reports are always welcome.