[Dovecot] Problem with process_limit

[FABIO FERRARI]

Hello,

i have a problem with the process_limit configuration.

Occasionally, it happens that the dovecot.log shows this line:
master: Warning: service(imap): process_limit reached, client connections
are being dropped

So I checked, the process number, with the command:
ps auxwww | grep imap | grep -v login | wc -l
and it shows 1024.

Then, i edited the file /etc/dovecot/conf.d/10-master.conf and set the line
process_limit = 1500

I checked if the dovecot had accepted the change with the command
doveconf -n | grep process_limit
and it shows
process_limit = 1500

But it is dropping the connections when they reach 1024 anyway, the
configuration parameter is totally ignored.

Can anyone help? Am I editing the right parameter?

thanks in advance

Fabio Ferrari

P.S. The version of the dovecot is dovecot-2.0.1-1_118.el5 on Red Hat
Enterprise Linux Server release 5.8 (Tikanga).