Major Description
with the introduction of JCRVLT-113 and JCRVLT-114, the subpackage installation checks if a package is already installed. for that it needs to find existing packages and read their packageid.
the problem is that reading the packageid, even for installed package, needs to open the zip file, and if too big, it's stream to /tmp. which can cause extensive /tmp and I/O usage during installation of "complex" packages.