Eclipse Memory Analyser rocks! Thanks a lot!! -Weijun
On Sat, Apr 3, 2010 at 2:25 AM, Benoit Perroud <ben...@noisette.ch> wrote: > Have a look at either Eclipse Memory Analyser (they have a standalone > version of the memory analyser) or YourKit Java Profiler (commercial, > but with evaluation license). I successfully load and browse heap > bigger than the available memory on the system. > > Regards, > > Benoit > > 2010/4/3 Weijun Li <weiju...@gmail.com>: > > Thank you Benoit. I did a search but couldn't find any that you > mentioned. > > Both jhat and netbean load entire map file int memory. Do you know the > name > > of the tools that requires less memory to view map file? > > Thanks, > > -Weijun > > > > On Sat, Apr 3, 2010 at 12:55 AM, Benoit Perroud <ben...@noisette.ch> > wrote: > >> > >> It exists other tools than jhat to browse a heap dump, which stream > >> the heap dump instead of loading it full in memory like jhat do. > >> > >> Kind regards, > >> > >> Benoit. > >> > >> 2010/4/3 Weijun Li <weiju...@gmail.com>: > >> > I'm running a test to write 30 million columns (700bytes each) to > >> > Cassandra: > >> > the process ran smoothly for about 20mil then the heap usage suddenly > >> > jumped > >> > from 2GB to 3GB which is the up limit of JVM, --from this point > >> > Cassandra > >> > will freeze for long time (terrible latency, no response to nodetool > >> > that I > >> > have to stop the import client ) before it comes back to normal . It's > a > >> > single node cluster with JVM maximum heap size of 3GB. So what could > >> > cause > >> > this spike? What kind of tool can I use to find out what are the > objects > >> > that are filling the additional 1GB heap? I did a heap dump but could > >> > get > >> > jhat to work to browse the dumped file. > >> > > >> > Thanks, > >> > > >> > -Weijun > >> > > > > > >
