Ubuntu Server slows to halt when multiple users log in.
We are soon (hopefully!) launching a wordpress based intranet site that is hosted on one of our local servers.
The server is a HP Proliant DL380, 4GB Ram with 3 x 72GB SCSI Drives, these are in RAID5 formatted with one simple volume.
It was setup with Ubuntu and currently using port:80
It works perfectly when one user is accessing the site but when 5 or more users access the first default page it grinds to a halt.
Can anyone please point in the direction that we should try and follow to find out what could be causing this?
Is the server maybe not upto spec? We plan to have 60+ users logging in at once.
Thanks in advance