Thanks Charles, It's clear now. I'll try to run Tomcat with "-client" instead of "-server" option.
It'd be nice to see some speed comparisons between "-client" "-server" and "-Xint" options and not only "-server" vs "-Xint". Regards, Leon On Fri, May 28, 2010 at 15:28, Caldarale, Charles R < chuck.caldar...@unisys.com> wrote: > > From: Leon Kolchinsky [mailto:lkolc...@gmail.com] > > Subject: Re: Tomcat died on "java.lang.OutOfMemoryError: requested > > 2147483664 bytes for Chunk::new. Out of swap space?" message > > > > My understanding that the difference between "-client" > > and "-server" is in the number of code execution before > > compilation occurred. > > No, that's one of the most trivial differences. The client and server JITs > are two completely separate and mostly independent compiler implementations. > > > Why is it "less fragile"? > > Because the server JIT (commonly known as C2) is much more complex and > includes many more optimization mechanisms; consequently, there is some > increased chance of error. > > Just for grins, I compared Tomcat startup times between server mode and > -Xint with a 64-bit JDK 6u20 running on a 2.0 Ghz dual-core AMD with 4 GB of > RAM and the following options: > > -Dcom.sun.management.jmxremote -XX:MaxPermSize=128m > -XX:+HeapDumpOnOutOfMemoryError > > Using Tomcat 7 RC2 with full logging enabled, server mode startup took just > under 4 seconds, whereas -Xint required over 6.5 seconds - a rather > significant difference, especially since it was purely startup. > > - Chuck > > > THIS COMMUNICATION MAY CONTAIN CONFIDENTIAL AND/OR OTHERWISE PROPRIETARY > MATERIAL and is thus for use only by the intended recipient. If you received > this in error, please contact the sender and delete the e-mail and its > attachments from all computers. > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org > For additional commands, e-mail: users-h...@tomcat.apache.org > >
