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Re: Understanding user_beancounters: tcpsndbuf [message #27926 is a reply to message #27849] Mon, 03 March 2008 11:52 Go to previous messageGo to previous message
xemul is currently offline  xemul
Messages: 248
Registered: November 2005
Senior Member
Quote:

So my first interest is about understand why I have a high number of tcpsndbuf.


High tcpsndbuf means that there are many active (i.e. passing data) TCP connections on the node.

Quote:

couldn't happen bad performance on this VE.


Small tcpsndbuf may cause a small performance degradation even when there's one TCP connection on the whole node. You may increase the one and check.

This limit was designed not to allow a VE users consume too many kernel memory by sending large amount of TCP packets. The difference between limit and barrier is used to provide a minimal speed for TCP connection when all the sockets are active.

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