Emacs: separate limitations of revision range and shown changesets. For revision range limitation, use "-r" opt with range notation at "hg log" invocation, and use hg-rev-completion-limit as default value. For shown changesets limitation, use "-l" opt at "hg log" invocation, and use hg-log-limit as default value.

#!/bin/sh
hg init 1
echo '[ui]' >> 1/.hg/hgrc
echo 'timeout = 10' >> 1/.hg/hgrc
echo foo > 1/foo
hg --cwd 1 ci -A -m foo
hg clone 1 2
hg clone 2 3
echo '[hooks]' >> 2/.hg/hgrc
echo 'changegroup.push = hg push -qf ../1' >> 2/.hg/hgrc
echo bar >> 3/foo
hg --cwd 3 ci -m bar
hg --cwd 3 push ../2