all of a sudden, slow resync

[Victor Sudakov]

Dear Colleagues,

All of a sudden, I've begun receiving this output when reindexing my mail boxes:

# /usr/local/bin/doveadm force-resync -u vas "*"
doveadm(vas): Warning: Transaction log file /home/vas/Mail/sibptus/.imap/sent/dovecot.index.log was locked for 55 seconds (Mailbox was synchronized)
doveadm(vas): Warning: Transaction log file /home/vas/Mail/sibptus/.imap/dss-30-06-2010/dovecot.index.log was locked for 56 seconds (Mailbox was synchronized)
doveadm(vas): Warning: Transaction log file /home/vas/Mail/sibptus/.imap/dss-2014/dovecot.index.log was locked for 95 seconds (Mailbox was synchronized)
doveadm(vas): Warning: Transaction log file /home/vas/Mail/sibptus/.imap/dss-20-06-2012/dovecot.index.log was locked for 72 seconds (Mailbox was synchronized)
doveadm(vas): Warning: Transaction log file /home/vas/Mail/sibptus/.imap/dss-18-05-2009/dovecot.index.log was locked for 31 seconds (Mailbox was synchronized)
doveadm(vas): Warning: Transaction log file /home/vas/Mail/sibptus/.imap/dss-07-12-2008/dovecot.index.log was locked for 56 seconds (Mailbox was synchronized)
doveadm(vas): Warning: Transaction log file /home/vas/Mail/sibptus/.imap/dns-operations/dovecot.index.log was locked for 95 seconds (Mailbox was synchronized)

And it really takes forever to finish.  What could cause this?

FreeBSD 11.2-RELEASE-p8, dovecot-2.3.3_4

-- 
Victor Sudakov,  VAS4-RIPE, VAS47-RIPN
2:5005/49 at fidonet http://vas.tomsk.ru/