vm-imap-retrieved-messages for IMAP folders

[Uday Reddy]

Are vm-imap-retrieved-messages used only for IMAP spool files, or are they also used for IMAP folders? This needs to be clarified.

They seem to be currently being used for IMAP folders as well, and they may be growing needlessly.

See Bug 671940 for the corresponding bug report for IMAP spool files.

[Uday Reddy (reddyuday)]

Running vm-prune-imap-retrieved (at work) pruned 13661 entries. Now, only 4 entries left, even though there 859 messages in the folder.

Let us watch if this grows.

[Uday Reddy (reddyuday)]

Entries were added to `vm-imap-retrieved-messages' recently (14 Dec). So, it is very much being used in IMAP folder code.

A search shows it being used in `vm-imap-get-synchronization-data' and `vm-imap-expunge-remote-messages'.

[Uday Reddy (reddyuday)]

According to the Internals section of the manual, only the messages that are expunged in cache, but not known to be expunged on the server, are listed in this list.

How does the list get updated?

[Uday Reddy (reddyuday)]

Full synchronization is not clearing the redundant entries in vm-imap-retrieved-list. This is a bug.

[Uday Reddy (reddyuday)]

After noticing that saving folders was taking an unduly long time, I narrowed down the problem to vm-stuff-imap-retrieved-list in an IMAP folder with about 2000 messages. Running `vm-prune-imap-retrieved-list' reported that 5389 messages were pruned. But the folder only had 2800 messages. So, a lot of old junk is being retained, slowing down the folder saving.