> 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
