I had been experiencing the same problem for the past year with hostagator before I finally quit using them. I was on the phone constantly with their support about this telling me to disable plugins and use w3 total cache which did not help either. they have a 25 process limit. I switched to using Arvixe and they have 500 process limit. I have been using wordpress by yoast without the same problem i had with hostgator, but you should still monitor your plugins. Install P3 Profiler plugin for wordpress to see which plugins use the most resources. Arvixe
