Thank you both for the very quick response.

Before my first post I was running the HelloWorld example from the eProsima Fast-RTPS. Specifically it was this commit:
"
tco@osboxes:~/Fast-RTPS-git$ git show
commit 2c86bb2d42e414007c2962942e321e82ff43ae9a
Merge: 87881ec b285f9b
Author: JavierIH <javierisabel@eprosima.com>
Date:   Thu Apr 20 08:08:08 2017 +0200

    Merge branch 'master' of git.sambaserver.eprosima.com:rtps/rtps
"
<img src="/uploads/ros/original/1X/ab31ef54d4f7e37b38b1eb74c52c0defbd83d4ef.png" width="556" height="112">

This morning I followed the instructions here:

 https://github.com/ros2/ros2/wiki/Linux-Install-Binary

And installed this:

ros2-beta1-package-linux-fastrtps.tar.bz2

Running the 'talker' and 'listener' examples in separate terminals I see that each has allocated over **540 megs** according to the 'VSZ' column in 'ps aux'.

I attached two screenshots to help communicate exactly what I used for the test before my first post and the test that I just ran this morning.

<img src="/uploads/ros/original/1X/92f971c03b74526fd81ec189912c0ff9514db86d.png" width="690" height="425">

As before, any help would be greatly appreciated.

nm.






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