Re: What happened to snappy low-bandwidth nnimap?

[Michael Welsh Duggan <mwd@cert.org>]

David Engster <deng@randomsample.de> writes:

> Steinar Bang writes:
>>>>>>> Richard Riley <rileyrg@gmail.com>:
>>> David Engster <deng@randomsample.de> writes:
>>
>>>> Gnus' nnimap used to be pretty snappy with low bandwidths, but now I
>>>> get "Initial sync of 2 groups (please wait)" and it downloads about
>>>> 700kb of data. While that in itself is pretty bad, I could probably
>>>> live with it if it actually did this once, but it does it almost
>>>> *every* time; so much for "initial".
>>
>>> Having spent a lot of time getting to understand agent, queues, plugging
>>> and levels and level specific downloads last summer on holiday I too
>>> have now noted that imap connections are really really slow on low
>>> bandwidth connections and it appears to be fetching a lot of data
>>> despite nothing being new.
>>
>> I guess it would be neat if one of you could use git bisect to find the
>> commit that triggered the behaviour...?
>
> It's not that easy since actual messaging of these "initial sync"
> thingies was added later. After looking into the logs it seems it has to
> do with QRESYNC handling; I'm using Dovecot 1.2 and it should support
> QRESYNC, hence I don't understand why I'm seeing so many "initial
> syncs". It could be because my connection drops frequently (as I've
> said, reception is terrible).

In <kslijqdw90.fsf@netfonds.no>
(<URL:http://article.gmane.org/gmane.emacs.gnus.general/81943>), Peder
Klingenberg gives a diagnosis of this problem.

-- 
Michael Welsh Duggan
(mwd@cert.org)