On Wed, 2009-10-07 at 17:53 -0500, Mike Abbott wrote: > 1. For every other APPENDed message, dovecot appends the new UID to > the list quickly. No problem here, this is fast. > 2. For every other other APPENDed message, dovecot scans the entire > UID list. This is an O(n) algorithm. Since it happens every n/2 > times it causes O(n^2) behavior across n consecutive APPENDs.
I'll look at this more closely later, but did you already try maildir_very_dirty_syncs=yes? Does this behavior happen also with it?
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