we have on one of our servers,
Wowza Streaming Engine 4 Monthly Edition 4.1.2 build13947
the server is a 8 core Intel Xeon CPU E5-2609 @ 2.40GHz
with 64 giga of RAM

this server with the same configuration was live streaming some months to 5000 viewers. But at the moment with 400-800 viewers the RAM usage on the enginemanager shows 100% usage.

This is causing disconnections with our viewers.
What could be the issue?

Thank you.