[Dovecot] index IO patterns

[Javier de Miguel Rodríguez]

> Even without LDA/LMTP dovecot-imap needs to write right? It would
> need to update the index every time an imap connect happens and
> new mails are found in the mail store.

Well of course. Indexes are also updated when flags are modified, moved 
a messages, delete a message, etc.. But in my setup there are 65% reads 
and the rest writes

Regards

Javier

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> Cor
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