JVM GC Graph

This gem creates a static HTML page that uses Google's Interactive Charts to display JVM heap usage. In order of this to work, you need to pass the following options to the JVM at startup:

-XX:-PrintGCTimeStamps -XX:-PrintGCDetails -Xloggc:<location of log file>

Here is an example:

java -XX:-PrintGCTimeStamps -XX:-PrintGCDetails -Xloggc:/path/to/memory_gc.log MyApp

Installation

gem install jvm_gc_graph

Does require the json_pure gem if on 1.8.7.

Usage

jvm_gc_graph -f /path/to/memory_gc.log -o /www/gc_log.html

1. Looks at /path/to/memory_gc.log which contains the gc log
2. Writes the result to the gc_log.html file.

See jvm_gc_graph -h for more options.

Other

For a much richer tool, try GCViewer.

License

Copyright (c) 2010 Richard Outten

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.