We are working with a VPS with 3 vCPUS, 4gb ram, with lamp, with a single moodle installation. Everytime ther eis a chat session the system gets slow.
Doing top via ssh gives a load average of >3 to a maximum of 60.
The chat usually has 10 to 15 students, in this case it had 14 (I was one of them) and it was nothing too chaotic.
The teachers insist on using moodle's chat because it keeps a log of the exchanges... but they to complaint on the slowing down of the server.
We tried the chat daemon but it hogged constantly 25% of the cpu...
We have every cache turned on and designer's mode is turned off... is there any alternative to this problem?