As long as RAM usage depends on number of files in cache, increasing maximum storage size will lower the number of files in cache and thus decrease the memory consumption. Also, with LFUDA replacement policy it will increate the byte hit radio.
No doubt that this will lower the RAM usage somehow. Let me rephrase my question: Any idea on what scale e.g. a doubled maximum_object_size will lower the RAM requirement (in percent)? (Same with switching the replacement policy).
IMHO RAM usage depends on the _mean_ object size, and this is not directly configurable as it depends on the type of traffic going through the machine. I think it is difficult to predict the RAM requirements and thats why I would always start with a smaller cache_dir and add some space later on while monitoring the RAM usage.
Regards, Hendrik.
