After doing an inventory of a DST volume on OES2105 SP1 (Volumes: NSS64, Primary 1.2 TB, Shadow 1.7 TB), the used memory grows (about 4Gb more) and is never freed back. The same happens on another server (about 6Gb used memory grow!!!).
I have tried to restart some processes (apache, tomcat, edir) without any success. The only way to get the memory back is to restart the server.

I think the problem could be in relation with java (the active process is httpstkd), but i have no idea how to get more information about it.