prblems rebuilding conversations db

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Hi,

because conversations db seems to be required for search indexes, I enabled this option on our production servers today and tried to rebuild the conversations db for all users with

ctl_conversationsdb -v -b UID

For most users this did take less than a second. But for some users this process would not finish. I did kill one process after about 30 Minutes (most others after 3 Minutes). The UserID.conversations has grown over 2 GB (the mailbox itself has only ~700 MB of mails,
and the conversations files from finnished rebuilds are less then 20 MB)

Cyrus Logs show many "ctl_conversationsdb[933]: mailbox: longlock user.UserID for 1.5 seconds"
every few seconds.

I did try reconstruct -r -G user/UserID, followed by ctl_conversationsdb -v -z UID and tried to rebuild the db again. Reconstruct reported no errors, and the new rebuild
hat the same problem.

Has anybody seen a similar problem?

Any ideas how to fix this?


We are running cyrus-imapd 3.0.8


Kind regards

   Michael Menge

--------------------------------------------------------------------------------
M.Menge                                Tel.: (49) 7071/29-70316
Universität Tübingen                   Fax.: (49) 7071/29-5912
Zentrum für Datenverarbeitung mail: michael.menge@xxxxxxxxxxxxxxxxxxxx
Wächterstraße 76
72074 Tübingen

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