Hello, We've several smtp gateway servers based on rhel5.6 , running postfix and amongst others spamassasin (via mpp). Almost every 10 or 15 minutes or so, postfix logs an error: postfix/smtpd[7258]: warning: timeout on 127.0.0.1:9998 while reading input attribute name
So it seems the service or server it too busy to honour this request. Spitting through some loopback adapter tcpdump dump file's, reveals a lot of these kind of messages: 15:08:29.356265 127.0.0.1 127.0.0.1 TCP [TCP Window Full] 47482 > distinct32 [ACK] S39 Win=32832 Len=96 Tcp auto-tuning is enabled : $ cat /proc/sys/net/ipv4/tcp_moderate_rcvbuf : 1 Any suggestions on tuning some ip / tcp kernel parameters or is everything handled via auto-tuning and we've reached the max of the servers capabilities? Cheers, Andre --- Wageningen University and Research The Netherlands http://www.disclaimer-uk.wur.nl _______________________________________________ rhelv5-list mailing list [email protected] https://www.redhat.com/mailman/listinfo/rhelv5-list
