Submitted by Richard on Sun, 03/03/2013 - 14:18
I was recently involved in a trouble shooting exercise where an application was giving terrible response times and frequent connection timeouts to visitors. This particular application has peak traffic demands during the business day and very few users overnight. From the checks I made using top and process status reports, it was easy to see that this virtual linux machine was saturated. Multiple virtual CPUs running 99% user+system and a run queue length over 30.
Click read more for why adding more vCPUs was not a good idea.
