CPU Usage goes very high and the server stops working


We have an issue very similar to this one below.
It has not been answered yet. Is this solved at all?

  1. It occurs in no specific time and happens whether there are many users or not.
  2. We are using Asterisk 12 and 13 and problems occur to both.

What are the points that we need to check to fix the problem?
Please help. Thank you.