June 2014
Intermediate to advanced
330 pages
7h 50m
English
The following VM parameters should always be set in your production environment to log relevant information. Even if they come with a small price in terms of performance costs (mostly disk I/O), if they are not set, you have quite a challenge ahead of you to resolve any VM-related problems (memory, GC, and so on) in your applications.
To retrieve basic memory details after each collection, add the following parameter:
-verbose:gc
The logged output looks like the following for a minor and major GC, respectively:
[GC 85310K->39093K(173056K), 0.0123160 secs] [Full GC 39093K->25698K(173056K), 0.1902890 secs]
First, on each line, GC means that a minor GC is executed, whereas Full GC naturally means that a full or ...