Does the -server flag affect Tomcat behaviour (as opposed to performance)

Question

Hi

I know that the -server JVM flag causes the JVM to use the Server VM rather than the Client VM, however, according to some internal documentation at my workplace, the presence/absence of this flag causes Tomcat to do/not-do on-the-fly JSP compilation.

Not knowing Tomcat that well, does anyone know if this is the case? My guess is that it is a misunderstanding of the flag on the author's part, but I wanted to be sure.

Thanks in advance

Rich

Answer 1

As in the comments,

JSP on-the-fly compilation works with -server and -client modes.

I think it's the performance of the JSP compilation in client mode which is more favourable than in server mode. This is most probably linked to the -XX:CompileThreshold flag which is 10000 for server and 1500 for client.

Some related reading is http://java.itags.org/hotspot-virtual-machine/163285/ and http://stackoverflow.com/questions/1481853/technique-or-utility-to-minimize-java-warm-up-time