Hi I have a Windows 2008 R2 server that is using all (more or less) its memory, it has 12GB installed and is using 11,8-11,9GB, according to the Task manager. It is a virtual server and it has 4 processors (Intel Xeon X5570 @ 2,93GHz) assigned to it. On this server I have WSUS (using Windows internal database) servicing 173 clients, F-secure Policy Manager 5 servicing 173 clients, MailEnable used very rarely. When the server is rebooted, the memory usage goes down to something like 2,5GB and the slowly rises so that it is peaked after a day or two. I really need some help in troubleshooting this, so that I can figure out if there is a problem or if the server simply needs more memory.

Hello, don't assign 12GB RAM for a WSUS, as Windows server 2008 R2 is used 4GB are sufficient.Best regards Meinolf Weber Disclaimer: This posting is provided "AS IS" with no warranties or guarantees , and confers no rights.

But still my problem remains that it is using 11,8-11,9GB.

Have you checked which process is utilising the Ram? I mean that have you utilised WSRM or something like that? WSRM will give you the information whats going on and you can tune the process also to the amount of resource you want them to consume on your server . Its there as a feature in server manager.

Open your task manager, click Processes and sort by memory. Give us the top 5 ones.