Hi Jim, In order to be sure, you need to so some additional memory > accounting and determine how much RAM you need to support > the shared segments for Sybase, and the JVMs. >
It's difficult for me now since I don't kwow what is the really troublemaker to cause this issue,I guess the JVMs,and I will suggest reduce the share memory allocation for sybase,that control it in sybase configuration file,not in "/etc/system". Thanks. Best Regards, Simon On Sun, Nov 22, 2009 at 11:33 AM, Jim Mauro <james.ma...@sun.com> wrote: > > You have about 9GB of shared memory (on a 16GB machine). > > > >> From the "prstat" output,we found 3 sybase process,and each process >> derived 12 threads,the java process(launched by customer application) >> derived total 370 threads, I think it's too many threads(especially of >> "java" program) that generate excessive stack/heaps,and finally used up the >> RAM ? >> > > Java can consume a lot of memory. Need to see the memory sizes, > but it's certainly a possibility. > > >> So I think decrease the share memory used by sybase(defined at sybase >> configuration layer,not in "/etc/system" file) would be helpful ? >> > > Sure. If you take memory away from one consumer, it leaves > more for the others. Whether or not it actually solves your > problem, meaning after such a change the system has sufficient > memory to run without paging, remains to be seen. > > In order to be sure, you need to so some additional memory > accounting and determine how much RAM you need to support > the shared segments for Sybase, and the JVMs. > > Thanks, > /jim > >
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