I've written before about how I'm running four Clojure-driven websites out of a single JVM on my VPS. No problems for many months, but today I tried to make a blog post and got all kinds of out-of-memory errors. Hopefully I didn't lose any / many user comments on this blog in the past couple days, but it's possible.
I restarted the JVM and gave it a bit more RAM to play with, I imagine this will fix things. But we'll see. It occurs to me now that there may be such a thing as too much caching.