This gets a bit tricky. Note they only mention the Sun JVM. There are (at least) two others, the one from the Blackdown group and one from IBM. Each has a different performance and load profile.
And I'm not sure what the mean by "real threads". Perhaps they mean that threads are treated like other kernel tasks, but with shared resources. ( anyone who knows better feel free to correct me) For a long time the only 'threads' available in the JVM were the so called green-threads, which were a user space simulation of kernel threads. If one thread dead locks it can grind the whole JVM to a halt, though. The first couple of Sun JVMs only supported green-threads. I think all JVMs currently avaiable support native kernel threads. You might want to ask on the jboss users list what peoples experience with the most recent Linux JVMs are. There was also a topic along these on JavaLobby recently. On Thursday 07 February 2002 02:59, you wrote: > When browsing through JBoss's documentation I found this remark: > > http://www.jboss.org/online-manual/HTML/ch11s02.html > --<snip>-- > Be aware however that JBoss performance is very dependant on the > underlying configuration. For example, informal tests show that on the > same PC box, it can run twice as fast under Windows 2000 / Sun JVM than > under Linux 2.2 / Sun JVM. > > Linux users probably already know that linux does not support real > threads. Under heavy load, JBoss will for example crash with 200 > concurrent users under linux, whereas it can handle 1000 of them on the > same box with Windows 2000. Of course, if you use Apache or Jetty in front > of JBoss to handle the thread pooling, this will not be a problem. > --</snip>-- > > This sounds alarming -- should I not consider Linux as a production > platform when thinking about serving Java (J2EE) apps? Is this why UNIX is > so popular in production servers? > > Regards, > Peter -- Rob Saul.:|:[EMAIL PROTECTED]:|:.de recta non tolerandum sunt _______________________________________________ Redhat-list mailing list [EMAIL PROTECTED] https://listman.redhat.com/mailman/listinfo/redhat-list
