port 11211 (memcached default) not open

Maxim Dounin mdounin at mdounin.ru
Mon Dec 28 03:49:06 MSK 2009


On Mon, Dec 28, 2009 at 08:57:29AM +0900, Nguyen Viet Cuong wrote:

> In our system, we have used memcached in the same way as Danny Trinh do.
> Recently, I have tried to use a portion of memory for storing cache files by
> mount /dev/shm to some point on filesystem. However, you said that:
> Also, you probably want to know that on modern operating
> > systems it is usually bad idea to place files into memory
> > explicitly.  Virtual memory subsystem will do it automatically as
> > long as you have spare memory on your server, and will likely do
> > it better than may be done by hand.
> >
> I do not know anything about this automatic mechanism.
> Could you explain more about this? Or could you give me some links?


In FreeBSD it's about 15 years now all available memory are used 
as disk cache (as disk cache actually integrated with VM system).  
And I belive Linux does the same for a while, too.  Exact 
algorithms used vary.

Maxim Dounin

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