On Wed, Oct 20, 2010 at 8:46 AM, Mike Hopper <[email protected]> wrote:
> I've been doing Java development for many years but sometimes > something surprises me. A coworker was explaining to me that many JVMs > allocate all of the memory specified by the -Xmx parameter at > application startup time. He said that this was an optimization > feature and that the JVM needs to ensure that it gets a contiguous > address space for its heap at startup. Some google searches confirmed > that this is the case for the IBM JVM. > > Why did you include *contiguous* in your statement. Most (all(??) modern processors hve an MMU and use a table to hold pages thus mapping pages into one long contiguous chunk is not a problem providing it can find enough pages. -- You received this message because you are subscribed to the Google Groups "The Java Posse" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/javaposse?hl=en.
