I just checked the info in comment #5.
I am able to branch this into the new format with a restriction on memory throughout the process.
$ ulimit -v 8000000
$ bzr init-repository test
$ cd test
test$ bzr branch ../data try1
bzr: out of memory
test$ bzr branch ../data try2
So it is obvious that some memory is locked that is not needed.
I just checked the info in comment #5.
I am able to branch this into the new format with a restriction on memory throughout the process.
$ ulimit -v 8000000
$ bzr init-repository test
$ cd test
test$ bzr branch ../data try1
bzr: out of memory
test$ bzr branch ../data try2
So it is obvious that some memory is locked that is not needed.