On my central postfix server I do typically 100k mail transactions per hour. Postfix 2.7 on a Dual Quadcore Xeon 4 GB Ram RHEL5 box.
Sometimes this happens that mails move very slowly from incoming queue to the active queue. I think I got the basic hygiene right: This server has absolutely no header-checks , no content-checks , transport file ( hash) has less than 2k lines and syslog is not an issue too. ( I dev-nulled the mail and tested that ) I suspect that the machine is starving on I/O , but "iostat " shows an iowait of only 10% >From the qshape readme http://www.postfix.com/QSHAPE_README.html "If the problem is I/O starvation, consider striping the queue over more disks" Does that mean I can have them over different partitions on different disks. I had initially assumed all the postfix spool must be on the same partition Thanks Ram
