Some other things that we can do to improve the memory usage:
* deploy a newer version of bzr which uses less memory (this is in the pipeline)
* increase the ulimits for the recipe build jobs on the buildds; if I remember correctly they were set pretty low because of responsiveness issues with the buildds that should be less of an issue now the buildd-manager has moved to twisted
Some other things that we can do to improve the memory usage:
* deploy a newer version of bzr which uses less memory (this is in the pipeline)
* increase the ulimits for the recipe build jobs on the buildds; if I remember correctly they were set pretty low because of responsiveness issues with the buildds that should be less of an issue now the buildd-manager has moved to twisted