what to do when your system just hangs because of higher load. This happens to me when my apche and mysql configuration was not proper. I had given more threads in apache config file than my actual memory and also the my.cnf file was given more temp cache than the actual memory of the system. This created a problem when more users coming to the webserver . The server gets high load and stop responding.
I have solved this by reducing the allocated memory to my mysql server and also adjusted theÂ parameterÂ in apache config file as per my actual memory.