[Dovecot] Performance of Maildir vs sdbox/mdbox

Jan-Frode Myklebust janfrode at tanso.net
Thu Feb 9 14:56:52 EET 2012

On Thu, Feb 09, 2012 at 01:48:09AM +0200, Timo Sirainen wrote:
> On 7.2.2012, at 10.25, Jan-Frode Myklebust wrote:
> > 	Feb  6 16:13:10 loadbalancer2 dovecot: lmtp(6601): Panic: file lmtp-proxy.c: line 376 (lmtp_proxy_output_timeout): assertion failed: (proxy->data_input->eof)
> ..
> > Should I try increasing LMTP_PROXY_DATA_INPUT_TIMEOUT_MSECS, or do you have any
> > other ideas for what might be causing it ?
> The backend server didn't reply within LMTP_PROXY_DEFAULT_TIMEOUT_MSECS
> (30 secs).

It's actually 60 sec in v2.0

> It still shouldn't have crashed of course, and that crash is already fixed in v2.1
> (in the LMTP simplification change). 

Do you think we should rather run v2.1-rc* on our dovecot directors
(for IMAP, POP3 and LMTP), even if we keep the backend servers on v2.0 ?

> Anyway, you can fix this without recompiling by returning e.g. "proxy_timeout=60" passdb extra field for 60 secs timeout.

Thanks, well consider that option if it crashes too often... Have only
seen this problem once for the last week.


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