Comment 8 for bug 902166

How many files are you syncing?
How did you measure the memory usage?

My syncdaemon is using quite a bit more memory - 'top' reports:
  PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
 3004 ayers 20 0 1582m 923m 151m S 0 23.4 33:07.46 ubuntuone-syncd
yes, that's one and a half GB VM where nearly a full GB is resident.

I had to increase fs.inotify.max_user_watches to actually sync 150K files/directories though. Also starting up the sync-daemon takes about 45-60 minutes to register all those files, during which time on CPU is constantly busy. (As I'm using and SSD the disk times seem negligible).