glewis at eyesbeyond.com
Thu Jan 8 19:14:42 UTC 2009
On Thu, Jan 08, 2009 at 09:44:04AM -0800, Brian Gardner wrote:
> Are there alternates methods available to access heap information from a
> running vm? This seems quite essential for tuning so I'd like to think
> there is something out there.
I'm not sure, since I don't do much with this myself. It seems like there
are some reasonable Eclipse plugins for doing stuff like that, but I
haven't tried to hook them up and I'm not sure what interface they use.
I do know I can analyse heap dumps...but thats obviously different than
a running VM. In terms of tuning the verbose GC information can also be
> Greg Lewis wrote:
> > On Tue, Jan 06, 2009 at 03:17:28PM -0800, Brian Gardner wrote:
> >> I'm trying to use jmap to dump a histo of a running vm, version
> >> jdk-188.8.131.52p4_6. jmap keeps returning the following error, 'no
> >> providers installed'. Are these tools supposed to function? If not are
> >> there any alternates?
> >> $ /usr/local/jdk1.6.0/bin/jps
> >> 72095 Jps
> >> 88259 Bootstrap
> >> $ /usr/local/jdk1.6.0/bin/jmap -histo 88259
> >> 88259: no providers installed
> >> $ ps -jax | grep 88259
> >> ee 88259 1 88249 87874 0 I p0 15:39.48 [java]
> >> ee 72142 72094 72141 88505 2 R+ p1 0:00.00 grep 88259
> > I don't know for sure, but I'm guessing that jmap requires a
> > serviceability agent, which there isn't an implementation of for
> > FreeBSD yet. We basically just either skip building or stub out
> > all the code for that.
Greg Lewis Email : glewis at eyesbeyond.com
Eyes Beyond Web : http://www.eyesbeyond.com
Information Technology FreeBSD : glewis at FreeBSD.org
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