Comment 3 for bug 1341292

The same bug exists on Nemo (should there be different bug report?)
It is less troublesome when you don't set Nemo as handling also your desktop, because closing Nemo correctly frees the memory.

$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 14.04.1 LTS
Release: 14.04
Codename: trusty

$ uname -a
Linux alain-Desktop 3.13.0-33-generic #58-Ubuntu SMP Tue Jul 29 16:45:05 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux

$ dpkg -s nemo
Package: nemo
Status: install ok installed
Priority: optional
Section: misc
Installed-Size: 2096
Maintainer: Ubuntu Developers <email address hidden>
Architecture: amd64
Version: 1.8.4-1.1
Depends: desktop-file-utils (>= 0.7), gsettings-desktop-schemas, gvfs (>= 1.3.2), libglib2.0-data, nemo-data (= 1.8.4-1.1), shared-mime-info (>= 0.50), libatk1.0-0 (>= 1.32.0), libc6 (>= 2.14), libcairo-gobject2 (>= 1.10.0), libcairo2 (>= 1.10.0), libexempi3 (>= 2.2.0), libexif12, libgail-3-0 (>= 3.0.0), libgdk-pixbuf2.0-0 (>= 2.22.0), libglib2.0-0 (>= 2.37.3), libgnome-desktop-3-7 (>= 3.2.0), libgtk-3-0 (>= 3.3.18), libnemo-extension1 (>= 1.1.2), libnotify4 (>= 0.7.0), libpango-1.0-0 (>= 1.20.0), libpangocairo-1.0-0 (>= 1.14.0), libx11-6, libxml2 (>= 2.7.4)
Recommends: eject, gvfs-backends, librsvg2-common, nemo-fileroller
Suggests: eog, evince | pdf-viewer, totem | mp3-decoder, xdg-user-dirs
Conffiles:
 /etc/xdg/autostart/nemo-autostart.desktop 01d1d8b6dbcb93ff99e0ad13004bd209
Description: File manager and graphical shell for Cinnamon
 Nemo is the official file manager for the Cinnamon desktop. It allows
 to browse directories, preview files and launch applications associated
 with them. It is also responsible for handling the icons on the Cinnamon
 desktop. It works on local and remote filesystems.
 .
 Several icon themes and components for viewing different kinds of files
 are available in separate packages.
Original-Maintainer: Nicolas Bourdaud <email address hidden>
Homepage: http://www.github.com/linuxmint/nemo/