We struggled the mentioned memory leak over a long time on our Debian systems, yet no such bug on our systems running NetBSD. It turned out the leakage was fixed 30th of May with this commit:
https://github.com/collectd/collectd/commit/fd01cdd0546ccbbda7f4cf5db2d0ae28e1e770cd It would be much appreaciated if this problem would be considered bad enough that the above fix is implemented for Debian as well, at least in form of backport packages for Debian-8 and 9. Thank you! -- Kolbjørn Barmen UNINETT, System og mellomvare
