[Dovecot] observations about delays

[Timo Sirainen]

On Monday, Sep 1, 2003, at 00:52 Europe/Helsinki, Eric S. Johansson 
wrote:

> In both cases when the client fetches messages from the inbox and 
> starts redistributing them, CPU utilization on the imap server goes to 
> around 40 percent for Mozilla and around 90 percent for mahogany.  
> There are long delays on the order of two minutes when filtering 
> messages. or 30 to 50 seconds when opening a mailbox.

Check what Dovecot is doing at the time. Use rawlog (or network 
sniffer) and strace.

> Other than the performance problems, Mozilla is relatively 
> well-behaved. Mahogany on the other hand is a bit more rough and (not) 
> ready.  It uses c-client for its imap code and during the filter 
> driven message redistribution process, it all of a sudden started 
> started complaining about unexpected EOF and I found one corrupted 
> message:

Humm.. If it copies a message from a mailbox to itself, that could 
break mbox, or at least complain about some errors.. Could it be that?