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From Jonathan Ellis <jbel...@gmail.com>
Subject Re: memory utilization
Date Sat, 12 Mar 2011 20:17:02 GMT
Nothing happens, because it _doesn't have to be resident_.

On Sat, Mar 12, 2011 at 1:47 PM, ruslan usifov <ruslan.usifov@gmail.com> wrote:
>
>
> 2011/3/11 Chris Burroughs <chris.burroughs@gmail.com>
>>
>> Is there an more or less constant amount of resident memory, or is it
>> growing over a period of days?
>
> As said in cassandra wiki:
>
>>>>The main argument for using mmap() instead of standard I/O is the fact
>>>> that reading entails just touching memory - in the case of the >>>memory
>>>> being resident, you just read it - you don't even take a page fault (so no
>>>> overhead in entering the kernel and doing a semi-context switch)
>
>
>
> So resident memory also will grow(but what happens when all physical memory
> end i don't know)
>



-- 
Jonathan Ellis
Project Chair, Apache Cassandra
co-founder of DataStax, the source for professional Cassandra support
http://www.datastax.com

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