I've just upgraded to 5.1.4393 (ok, uninstalled, backed up, re-installed), and noticed it is using heaps of memory - much more than 5.1.4128. I was running on a Win2K3R2SP2 VM with 256MB of memory allocated, and it tended to run with a commit charge of around 230MB. Now it is running (with nothing else but 3CX with a commit charge of around 360MB - so it's over-committed by around 100MB). The 3CX Processes are using: Apache (2 instances 48MB and 12MB) 60MB Media Server peaked at 38MB, but dropped down to 2MB Fax Server 29MB IVR peaked at 12MB, but dropped down to 5MB Phone System 3MB And (I almost forgot), half-a-dozen instances of postgres at around 5MB each. All in all, a peak of 190MB, and steady state of around 120MB! I'm lucky in that I can just increase the memory allocated to the VM, but this is a huge increase. Any reason why? Can anything be done to drop the memory footprint - in particular the Fax Server and Apache? Has a config change been made to Apache that causes it to allocate vast quantities of RAM? I know that 256MB is not much for a machine now - but when you're trying to run lots of VMs, allocating 2GB to all of them "just in case" isn't an option - you need to allocate a sufficient amount to each so that they don't page, without wasting memory. 3CX used to play nice in 256MB, but now cant. What gives?