- Alin Pastrama
We have recently been targeted with an attack where several thousands of mails were sent to our Kerio mail server, and at some point Kerio complained about running out of memory. The usage at that time was near 12GB RAM (the entire server capacity), and Kerio had something around 5000 mails in the queue.
I am wondering if there is any insight into how Kerio uses available memory and if there any knobs to control that. We plan to upgrade the server memory, but that will simply delay the problem. It would be interesting to know if there is any data about how much incoming mail Kerio can process depending on memory availability.
Our setup is as follows:
Version: 8.3.2 (3100)
Operating system: Mac OS X (10.8.5), x86_64
Number of active mailboxes: 55 (65 created)
RAM: 5.8 GB of 12 GB used
Disk: 1.1 TB of 1.8 TB used
12GB of RAM should be fine, especially with 65 mailboxes. I am not sure what happened in that instance but as far as the queue, look at disk speed. It sounds like the mailboxes are significantly large so there may be a lot of activity. Also look at excessive active connections from users.
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