queuing database tasks?

[Nicolás Reynolds]

hi! sometimes my machine takes a little while to process new emails and
if i'm reading email during that moment, tagging and untagging fails
because the xapian database is write locked.

this affects manual tagging but also the emacs interface removing the
unread tag so i often have to come back or wait to do it manually.

would it be possible to queue these actions until the database is
unlocked again or any other solution?

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