Why bother? 2% more memory is within the error margin, it could be virtually
anything that causes your MySQL process to use a little bit more memory in
the other case, maybe your test case is a little bit different, maybe the
new access patterns cause a different usage on the internal buffers, maybe
it's just random chance.

The important thing is that you consume 1/10th of the CPU with caching,
which means the whole thing works as it should and takes load off your MySQL
server.


/Henrik

On Thu, Mar 25, 2010 at 08:46, p23 <[email protected]> wrote:

> Hi,
> I've 3 server running apache,MySQL and memcached.
> i monitor the CPU+Memory usage of MySQL.
> it show when i'm using MySQL with memcached (dedicated server), the
> cpu usage is very low but the memory quite higher a little bit. It's
> not much, but i'm wonder why it goes higher (than MySQL with memcached
> disabled) since items are already cached and memcached reside in
> dedicated server. I run it many times and it shows the same result.
>
> MySQL + query cache:
> Mem: 45.0 %
> Cpu:  19.0 %
>
> MySQL + memcached:
> Mem: 47.0 %
> Cpu: 2 %
>
> Thanks in advance :)
>
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