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From André Warnier ...@ice-sa.com>
Subject Re: [OT]RE: Maximum memory that can be assigned to Tomcat on windows platform
Date Thu, 01 Dec 2011 11:43:11 GMT
Mikolaj Rydzewski wrote:
> On Thu, 1 Dec 2011 12:29:14 +0100, Casper Wandahl Schmidt wrote:
> 
>> That didn't quite help me understand, because how can the OS map from ie.
>> 0-4GB to 4-8GB (the window is moved) when it can only use a 32bit 
>> register
>> to tell the machine where to look in the psysical memory, that is 
>> where my
>> knowledge ends :) So I read about PAE and found out that it uses 2 
>> registers
>> (36 bits due to some bits being used as flags) and that makes good sense,
>> but how can the cpu calculate an address without overflow and send a 
>> command
>> to the bus containing a 36bit address (or whatever fetches the bits from
>> RAM)? That is where I'm puzzled but I guess it is because I'm not at all
>> into ISA-level and below :)
> 
> Well, it's rather out of the scope of this list.
> 
> On the other hand, increasing java heap size is not always the best 
> option. It heavily depends on memory usage pattern in your application. 
> In general: the bigger heap, the longer GC will run.
> 

Why do I feel that a comment from Chuck is going to follow that one later on ?
;-)


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