about dalvik and cache

[patrickdrd]

so what's about android's cache management system? last night another strange thing happened: I had around 570mb free internal storage space, I moved my apps from my sd card to the internal and there was 350mb left, after that I went into recovery and cleaned dalvik cache and cache, after booting free space went up to 530mb! and after some minutes even up to 570mb! so, my question is can somebody explain this behavior? is this normal? and which one of the two (dalvik or cache) frees up the space?

thanks in advance!