Zitat von Peter Sørensen <mas...@sdu.dk>:
I've already used the proxymap solution. We ran into serious problems with the clustered mysql backend.I have 5 servers with smtd set to max 300.I will get back to the proxymap solution. I have adjusted some settings in the mysql backend.
You really should use proxymap to reduce the number of open connections to your DB servers. A value of 10...20 connections per server managed by proxymap should be fine. Also check if the lookups are optimized to use the index (man mysql_table).
But still - this annoys me. What is triggering postfix to make this behavior?
If the file based table changes the smtpd's are restarting, not Postfix (the queue-manager). The performance penalty is not as bad as you might think anyway because it is only the "startup" costs for smtpd processes. Nearly no cache or state information is lost.
Regards Andreas
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