diff -Nru landscape-client-16.03/debian/changelog landscape-client-16.03/debian/changelog
--- landscape-client-16.03/debian/changelog	2018-12-13 12:32:21.000000000 +0000
+++ landscape-client-16.03/debian/changelog	2019-02-13 11:51:54.000000000 +0000
@@ -1,3 +1,10 @@
+landscape-client (16.03-0ubuntu2.16.04.6) xenial; urgency=medium
+
+  * debian/patches/mem-usage-1685885.patch: Reduce memory usage by
+    unused twisted logs. (LP: #1685885)
+
+ -- Simon Poirier <simon.poirier@canonical.com>  Fri, 08 Feb 2019 12:02:17 -0500
+
 landscape-client (16.03-0ubuntu2.16.04.5) xenial; urgency=medium
 
   * debian/patches/nutanix-kvm.patch: Update vm_info.py to include Nutanix
diff -Nru landscape-client-16.03/debian/patches/mem-usage-1685885.patch landscape-client-16.03/debian/patches/mem-usage-1685885.patch
--- landscape-client-16.03/debian/patches/mem-usage-1685885.patch	1970-01-01 00:00:00.000000000 +0000
+++ landscape-client-16.03/debian/patches/mem-usage-1685885.patch	2019-02-13 11:51:54.000000000 +0000
@@ -0,0 +1,28 @@
+Description: Reduce memory usage by unused twisted logs.
+ This initializes the twisted logging to clear its buffer.
+Author: Simon Poirier <simon.poirier@canonical.com>
+Origin: backport, https://github.com/CanonicalLtd/landscape-client/commit/7f98306e3159e956798b70d2b5fc8c0773373fdd
+Bug-Ubuntu: https://bugs.launchpad.net/bugs/1685885
+Last-Update: 2019-02-12
+
+--- a/landscape/deployment.py
++++ b/landscape/deployment.py
+@@ -7,6 +7,7 @@
+                      FileHandler, StreamHandler, Formatter)
+ 
+ from optparse import OptionParser, SUPPRESS_HELP
++from twisted.logger import globalLogBeginner
+ 
+ from landscape import VERSION
+ from landscape.lib.persist import Persist
+@@ -29,6 +30,10 @@
+         format = ("%(asctime)s %(levelname)-8s [%(threadName)-10s] "
+                   "%(message)s")
+         handler.setFormatter(Formatter(format))
++    # Initialize twisted logging, even if we don't explicitly use it,
++    # because of leaky logs https://twistedmatrix.com/trac/ticket/8164
++    globalLogBeginner.beginLoggingTo(
++        [lambda _: None], redirectStandardIO=False, discardBuffer=True)
+ 
+ 
+ class ConfigSpecOptionParser(OptionParser):
diff -Nru landscape-client-16.03/debian/patches/series landscape-client-16.03/debian/patches/series
--- landscape-client-16.03/debian/patches/series	2018-12-13 12:32:21.000000000 +0000
+++ landscape-client-16.03/debian/patches/series	2019-02-13 11:51:54.000000000 +0000
@@ -12,3 +12,4 @@
 release-upgrade-success.patch
 post-upgrade-reboot.patch
 1616116-resync-loop.patch
+mem-usage-1685885.patch