Apache started to stop and then I can’t log in to the server via ssh the first time - it hangs terribly. Only reboot helps. I went to whm to see the apache status and this is what I saw there: 
Workflows are really a couple of pieces, but there are 60-70 pieces of such "Waiting for Connection" and they do not go away. Requests are sent by Ajax, and on the page I see that the answer has turned and everything is fine, but why do not they leave Apache’s tasks? Please help in which direction to look?