Look at the open files - it is 9182. That IS already pretty high, but you may be hitting that limit since in Unix, everything is a file. Sockets, etc.
On Linux, is there a way in the JVM to tell the difference between memory given to the new generation, old generation, and permanent generation in the JVM? There were users on this list posting weird OutOfMemory errors last week that were doing class reloading, and the permanent generation was filling up even though there was plenty of space in the old and new gen. Of course, I think these comments only apply to a 1.4.x JVM. Does your code do funky stuff with the classloaders, or are you reloading your application in Tomcat's manager? (or changing web.xml, which would cause reloads??) Have you profiled your application to find any memory leaks? >>> [EMAIL PROTECTED] 12/6/03 11:45:27 AM >>> I am using Linux2.4.20-smp. I think the limits for the entire system are not problem: >cat /proc/sys/kernel/threads-max 14336 >cat /proc/sys/fs/file-max 209708 >cat /proc/sys/fs/file-nr 2231 1366 209708 >ulimit -a core file size (blocks, -c) 0 data seg size (kbytes, -d) unlimited file size (blocks, -f) unlimited max locked memory (kbytes, -l) unlimited max memory size (kbytes, -m) unlimited open files (-n) 9182 pipe size (512 bytes, -p) 8 stack size (kbytes, -s) 8192 cpu time (seconds, -t) unlimited max user processes (-u) 7168 virtual memory (kbytes, -v) unlimited But I can't find where the limits for each process/user are. One message found from google said PTHREAD_THREADS_MAX could be the max thread count per process. In my /usr/include/bits/local_lim.h, I have /* The number of threads per process. */ #define _POSIX_THREAD_THREADS_MAX 64 /* This is the value this implementation supports. */ #define PTHREAD_THREADS_MAX 16384 16384 is large enough, I believe. Then what could be the reason of the error? By the way, the "Out of Memory" error didn't appear all the time. Sometimes there was just no response without any error message. Do you know where I can get more detailed bug files? Thank you very much. Qi On Sat, 6 Dec 2003, Tim Funk wrote: > When you get "java.lang.OutOfMemoryError: unable to create new native thread" > it means you are running into an operating system limit. You can give the JVM > 1 Exabyte of memory and you'll still get this error. > > Look at the kernel parameters for your machine and the following limits: > 1) Threads allowable on the system > 2) Threads run by a user > 3) Threads run by a process > 4) File handles per process > 5) File handles per user > > Use your OS manual or Google to tweak these parameters. > > http://jakarta.apache.org/tomcat/faq/memory.html#why > > -Tim > > qi zhang wrote: > > Hi, > > > > I have stunk on this problem for almost 2 weeks. :-( > > In these two weeks, I have tried many methods, but it still doesn't work. > > > > I built a system to run TPCW benchmark. One web and application server, > > with tomcat4.0 running, one database with mysql4.0 running on it and > > several client machines. The Jave version is j2sdk1.4.0_03. The system > > worked perfect under light load. But when the number of clients > > exceeded some number (like 600), the tomcat4 didn't work anymore. > > I checked catalina.out. Sometimes no error message appear, while in some > > time it appeared the error: > > > > SEVERE: Caught exception executing > > [EMAIL PROTECTED], terminating thread > > java.lang.OutOfMemoryError: unable to create new native thread > > at java.lang.Thread.start(Native Method) > > at > > org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.<init>(ThreadPool.java:497) > > at > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] > -- Qi Zhang, Ph.D Student Department of Computer Science, College of William and Mary P.O. Box 8795 Williamsburg, VA 23187-8795 --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] Jeff Tulley ([EMAIL PROTECTED]) (801)861-5322 Novell, Inc., The Leading Provider of Net Business Solutions http://www.novell.com --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
