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 console CPU and Memory 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.