We have an application hosted on a JVM, which has around 16 GB of memory allocated. With only 3-5 users logged in, we see that the memory usage at times is around 12-14 GB. We checked the clipboard size of the requestors and none of them is more than a few MB (100 MB maximum at times). Cache size is not considerable either (all caches included amount to less than 1 GB). Any idea what else could be causing this high memory usage?