Re: Kernel doesn't free Cached Memory

[Alan Cox]

On Gwe, 2005-07-22 at 08:27 -0300, Vinicius wrote:
> Hi all! 
> 
>    I have a server with 2 Pentium 4 HT processors and 32 GB of RAM, this 
> server runs lots of applications that consume lots of memory to. When I stop 
> this applications, the kernel doesn't free memory (the  memory still in use) 

See any FAQ on the Linux memory management - memory is reclaimed when
needed not when nobody is using it. That makes things more efficient.

> and the server cache lots of memory (~27GB). When I start this applications, 
> the kernel sends  "Out of Memory" messages and kill some random 
> applications. 

Some RHEL3 kernels had a problem with very large memory sizes and 2.4.
That should not be the case in the current RHEL3 kernels. 2.6 handles
very large systems a lot lot better, and of course the fact real
computers now have 64bit processors has also rather improved life.

Alan

 
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