it can be a balancing act. Even if you're not using the RAM, linux is probably using it for caching and look ahead buffers.
i still think memcache is worth it. Just make sure to get the latest version and watch for memory leaks. Even with 8 large buffers there's a leak on ours and it just continually grows until it runs out of memory and crashes. I created a little script to monitor the instances and restart them automatically if one or more crashes.

-Don-

On 12/12/2014 3:09 PM, Keith Smith wrote:
Yes for performance.  Active website with lots of content and lots of 
modules.  I have extra RAM that can be used to tune Mysql.


On 2014-12-12 13:48, Muzaffer Tolga Ozses wrote:

For performance?
On 12 Dec 2014 21:35, "Keith Smith" <techlists@phpcoderusa.com> wrote:


Hi,

Data center says to tune MySql instead of using memcache.

Any thoughts?

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Keith Smith
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        Fane Software