Warning "More than nnn MB of RAM may be needed to manage file ..."

[Dr Rainer Woitok]

Greetings,

When I add a huge file  to a Mercurial repository  I might get a message
along the lines of

   More than nnn MB of RAM may be needed to manage file ...

which is a really good reminder about what you might have to pay.   How-
ever, when a small file is added to a repository which then continuously
grows from changeset  to changeset  until it reaches,  say,  300 MB, you
will not receive  the above warning message  even though  this file will
not be pullable from older hosts not equipped with enough RAM.

Is it possible  to also receive such a warning message  when an existing
file grows beyond easily manageable limits?

Sincerely,
  Rainer