I went for PS at the minimum levels just to get a guarantee that my web server won’t be affected by the runaway processes from bad neighbors - they’re not bad people, they just either need to optimize or get over their traffic spike.
One thing I did notice is that I’m now hyper-aware of the memory utilization of my sites.
BTW, support mentioned to me that if I have critical sites and non-critical site, I can open two accounts/plans and have one be a regular shared hosting account and have one be a PS account. This way I can have save some money by staying on a cheaper PS level even if I have a couple of sites that can be fatter but where occasional slowdowns would not be the end of the world. I’ve been thinking about throwing my Gallery site out of my PS account and onto a new shared hosting account, but so far I’m within my PS limits even with all my sites on my PS server.
Practically speaking, my sites now have very predictable performance. They weren’t heavyweight to begin with, but response time would still spike when the server was under heavy load. I’ve never personally seen my site be slow after switching to PS so I guess you have to call me a happy DreamHost customer.
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