[Dovecot] A lot of dovecot/imap processes

[Steffen Kaiser]

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On Wed, 30 Jan 2013, C3PO sysadmin wrote:

> I have a dovecot installed and many users could login via IMAP over SSL (40 
> users at same time aprox).

> Users could have "Check mail every X time" enabled in their client 
> (Thunderbird or K-9 mail) - Is this required feature? I noted that if I 
> disable it I still getting news mails without having to check for new mails 
> manually - .

That depends on the client, they can IDLE to wait for new mail. That 
requires one open connection per checked mail folder.

> I noted that dovecot is creating a lot of process (dovecot/imap and 
> dovecot/imap-login) and is requiring more and more RAM.
> I think that every login starts a process but never is endend.

The processes vanisch if the client terminates the connection.

> Is that normal?

Yes.

> Details:

You could try decreasing conf.d/20-imap.conf:

   # Maximum number of IMAP connections allowed for a user from each IP 
address.
   # NOTE: The username is compared case-sensitively.
   #mail_max_userip_connections = 10


- -- 
Steffen Kaiser
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