On Tue, 2008-09-09 at 17:31 +0200, Cor Bosman wrote: > > 60 seconds is also when Dovecot decides the dotlock file is stale. So I > > guess the cache file compression is taking longer than that. Hmm. I > > hadn't thought about that before, since it was supposed to happen rarely > > enough. But I guess during the compression other processes shouldn't be > > stuck waiting for it. I'll have to think about something - probably make > > the lock timeout only a couple of seconds and after that just fail to > > update it.
Did a couple of changes: http://hg.dovecot.org/dovecot-1.1/rev/898e3810c014 http://hg.dovecot.org/dovecot-1.1/rev/e3c5acf92b53 > > But the cache compression really shouldn't take that long unless you're > > really really running out of disk I/O. I wonder if there's some problems > > with the locking / NFS caching. You do have mail_nfs_*=yes, right? > > # grep nfs dovecot.conf > mail_nfs_storage = yes > mail_nfs_index = yes > > What exactly is being compressed? We have 500MB mailspace, and plenty of > users have that kind of space actually in use. Basically deleted space is removed from dovecot.index.cache by recreating the file and leaving out the deleted parts. > I dont think the storage servers are slow in any way. Else we'd be seeing > this much more. As i said, so far it's less than 1% of our users that I can > find with that cache error, but most of those do say they have a lot of large > files. So maybe it's something with lots of emails, and the need to update > a large portion of the cache? It probably needs to go over the wire twice > right? Once to read, once to write? You could check how large the dovecot.index.cache file is for those users. Normally it's something like 10-20% of the mailbox size, but it really depends on the emails. > One thing is, we dont use deliver, so whenever dovecot hits the user's email > it most likely will have to re-index all new email. There's no "reindexing". It just sees a new mail and adds it to the index. Not a problem in any way.
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