My server sometimes has huge loads that I think are generated by apache, but I can't explain why, it started 2 days ago to be more noticeable but from time to time I already had the server stalling It can go to a server load of 1.xx to 90.xx, and then back again. I am running a forum (vbulletin) on this machine, nothing else, on busy hours I have up to 2000 users online, but server stalls sometimes even in non-busy hours. Also apache is generating huge logs and I don't seem to be able to prevent that (using ISPConfig). What kind of optimisations can i do to apache and mysql to make it run smoothly? Should I upgrade apache and mysql? I only upgrade by doing yum update, but that is not upgrading my mysql and apache to the latest versions.