[xwiki-users] estimating the size of the temp directory

Hello XWiki experts, we had recent disk-space issue so before we upgrade to xwiki 3.5 we need to be sure the local disk is going to handle things. We have about 50Gb available but we have very many uploaded files of 2-5 Mb... so we may run into a limit. Do I understand properly that: 1- all attachments are stored, in their original form, in DB unless the filesystem storage is activated 2- all attachments, once stored in the DB, get stored in a local file before they are served over the line 3- this storage is within the directory configured as xwiki.temp.dir 4- this storage should be shared if we are clustering 5- this temporary storage gets erased from time to time Correct? Is there a way to bound the size of these attachments? Can I fiddle with files inside there? thanks in advance Paul PS: to contradict assertion 3, I got in my log: but this directory did not grow having downloaded an amount or having requested an attached picture with different sizes... neither did /tmp/xwiki exist.