[Dovecot] sporadic slow/non response, problems copying to, sent folder
dovecot at danno.mail.coppock.com
Sat May 5 20:35:13 EEST 2007
>> 1. Coming back to the idle client, and clicking on a newly arrived
>> message, often a long delay (seems like minutes, sometimes) will
>> occur before the message loads from the server.
>> 2. Sending messages, as often as not, the client will stall,
>> sometimes indefinitely, on "copying message to sent folder".
> Does this happen when using a client which is on the same LAN as
> the server? This kind of behavior looks like a network issue.
You called it. We access the server over the Internet. How did I forget to provide that small detail? However, that's not the slowness I speak of. Perhaps a better term is long delay, like waiting on some timeout, before message loadding (in symptom 1., above).
So are there parameters to tune, that will make dovecot behave nicer? I do not believe this to be connectivity outages between our clients and the server. For one, we never experienced these symptoms with UW-IMAP.
I just duplicated the stall on copying to Sent folder. This is probably the more prevalent, and annoying of the two problems.
* There was only one active client.
* The client was T'bird, v220.127.116.11, running on XP.
* This particular test had a 3Mb attachment.
* The mail was delivered immediately to the single, remote recipient (after a ~20 seconds of 3Mb upload).
* The "Copying to Sent Folder" dialog stayed up for (no exaggeration) 15-minutes, and then completed; the message is in the Sent folder now.
suspicion, from months of experiencing the behavior:
* Attachments are usually involved.
How does the config look? Are the mbox lock settings appropriate? I was
somewhat shooting in the dark there.
* Sendmail 8.13.6/8.13.6
* $sudo sendmail -bt -d0.10 < /dev/null | grep HASFLOCK
OS Defines: BSD4_4_SOCKADDR HASFCHOWN HASFCHMOD HASFLOCK
mbox_read_locks = flock
mbox_write_locks = flock
What else can I provide? netstats? tcpdumps? Are there logs/debugging appropriate to enable?
Thanks for any ideas, Danno
More information about the dovecot