I'm writing a Java application that runs on Linux (using Sun's JDK). It keeps creating /tmp/hsperfdata_username directories, which I would like to prevent. Is there any way to stop java from creating these files?
A:
EDIT: Cleanup info and summarize
Summary:
- Its a feature, not a bug
- It can be turned of with -XX:-UsePerfData which might hurt performance
Relevant info:
svrist
2008-09-16 20:12:43
The bottom of that page outlines a solution, that does indeed work.
rcreswick
2008-09-16 20:20:46
Down votes are not hostile actions. They just reflect the percieved accuracy of your answer. Your original answer indicated it could not be solved ("Looks like you cant"). That just was not true.
Stu Thompson
2008-09-16 21:02:52
+5
A:
Try JVM option -XX:-UsePerfData
Performance likely will suffer.
(sorry for the delete confusion. I did a little searching around and started to doubt my answer.)
Kyle Renfro
2008-09-16 20:13:00
+1
A:
From svrist's link:
The first item in http://java.sun.com/performance/jvmstat/faq.html mentions an option which you can turn off to disable the whole suite of features: -XX:-UsePerfData.
Stu Thompson
2008-09-16 20:19:47
+1
A:
According to the filed bug report there is a work-around:
This undocumented option will disable the perfdata feature:
-XX:-UsePerfData
It's worth mentioning that it is a feature though, not a bug. The above work-around just disables the feature.
SCdF
2008-09-16 20:20:04
A:
You can attempt JVMs provided by other vendors to see if they implement this better. List of JVMs
martinatime
2008-09-16 20:22:38
A:
There is also "-XX:+PerfDisableSharedMem" option (recommended by Sun) which should cause less performance issues than use of "-XX:-UsePerfData" option.
Zweiberg
2010-06-17 09:09:36
A:
Use the JVM option -XX:-UsePerfData.
This will not have a negative effect on performance, as some other answers says.
By default jvmstat instrumentation is turned on in the HotSpot JVM. The JVM option -XX:-UsePerfData turns it off. If anything, I would speculate, turning off the instrumentation would improve performance (a trivial amount).
So the downside of turning off jvmstat instrumentation is that you lose the performance monitoring information.
jvmstat is described here http://java.sun.com/performance/jvmstat/
Here's a thread with someone who is worried that by turning on jvmstat - with the option -XX:+UsePerfData - will hurt performance.
http://www.theserverside.com/discussions/thread.tss?thread_id=33833
(It probably won't since jvmstat is designed to be "'always on', yet has negligible performance impact".)
Jon Stafford
2010-10-14 13:24:28