<div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;"><div class="im">Depends on the nature of the upgrade steps to be performed. Worst case</div>
is linear on the number of msgs on disk, but upgrades like that only<br>
happen when we change the on-disk format, which doesn't happen very<br>
often.</blockquote><div><br></div><div>That makes sense. Thanks for explaining.</div><div><br></div><div>-J </div></div>