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java hotspot

Pradeep bhatt
Ranch Hand

Joined: Feb 27, 2002
Posts: 8904

Java Hotspot with the server option is suitable for running server applications. When I start JRun app server with the java - server option I have noticed that the startup time is more that the -client option.

I want to know the reason for the delay
Is it because it optimizes the hot spots ? If true, does it load all the classes rather than loading on demand. I was under the impression that it optimizes during runtime.


Ernest Friedman-Hill
author and iconoclast

Joined: Jul 08, 2003
Posts: 24183

You're comparing the -client runtime to the -server runtime. The documentation says that the -client runtime is optimized for quick startup and smaller memory footprint and not so much for runtime performance, whereas the -server is designed to get the maximum performance, without regard for startup time. Presumably during startup, the -server option builds various in-memory data structures that will help with optimization.

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It is sorta covered in the JavaRanch Style Guide.
subject: java hotspot
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