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Performance Problem With Due To Missing TCP_NODELAY Flag On Sockets (Doc ID 2295624.1)

Last updated on APRIL 07, 2022

Applies to:

Oracle Communications Messaging Server - Version 8.0.1 and later
Information in this document applies to any platform.


There appears to be a performance problem with due to it not having a TCP_NODELAY flag on sockets.

Investigation of network traces may show a delay (in one example, 40 milliseconds) between different read/write operations when interacting with the milter. It appears there is some incompatibility between Solaris (Nagle algorithm) and Linux (delayed ACK) TCPIP stack configuration? (A problem further discussed at ).

As milter is a protocol with a lot of back and forth communication in small packets, this may cause performance problems in some circumstances where the time to fully process a message through milter ends up much longer than it needs to be. Could setting TCP_NODELAY flag on sockets initiated by the libmilter plugin improve this? Does have this option?




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