Comment 14 for bug 1471903

this is inside an armhf chroot on wily with -updates, -security and -proposed enabled (note that is not including the overlay PPA indeed, this would add another few MB):

root@localhost:/# du -hcs /var/lib/apt/lists/
81M /var/lib/apt/lists/
81M total
root@localhost:/# tar czf sources.lists.tgz /var/lib/apt/lists/
root@localhost:/# ls -lh sources.lists.tgz
-rw-r--r-- 1 root root 20M Aug 15 10:37 sources.lists.tgz

our tarball size is limited to the size of the cache partition, all three tarballs (rootfs, device, customization) need to fit into it at the same time for the update to work, someone needs to check if this is still the case, afaik we do not have much wiggle room and 20MB are quite a lot.

on the readonly rootfs partition we have between 200 and 300MB free space for allowing to make the device writable and install debug, autopilot or test packages from a silo, cutting off 89MB+ is quite a big task here and we can not re-partition the devices.