Is this a memory leak?

[Azurel]

Hi,

First.. I dont say Plesk have a memory leak. I only look for help to find a solution what here happen.
I have installed MRTG to monitoring memory, ram and so on...

I have a root server with Plesk11.5 and only one active domain with a very small forum. Thats all.

You can see, the available memory is a little less every day. The "cached"-memory go higher and higher.

http://i.minus.com/iM2gDCPhfyHbS.png

September startet a domain with a forum.. begin of october I restart the server

http://i.minus.com/iPep9RlHqO9pY.png

The forum worked fine on another server (without plesk). So I think is not the forum software.

I use centOS6
Mysql Server 5.5.33
PHP 5.3.27
Plesk 11.5.30#21


Can anybody help me here?

EDIT: free -m:

16GB cache ist (in my eyes) very high for only a very small forum. I can only think that plesk create new files(or so) and linux cache this files and the cache grow up?

 

[Starl1ght]

I am almost sure, that Plesk is not guilty here. You can check IO with usual linux tools to find guilty process.

 

[Azurel]

I have deactivate drWeb and SpamAssassin since 3 days and the memory consumption seems normal now. "free -m" shows "5733" cached. I will continue to look at it