SUMMARY:RE: TCP_keepalive

From: Rich Bonfoey <>
Date: Fri Apr 01 2005 - 14:12:12 EST
Many thanks to Eric Voisard and Sam Nelson for sharing their expertise.
Eric provided
insight to another variable tcp_time_wait_interval, that it can have an
affect on connections.  Sam , very graciously  provided a script that he
uses to tune and sanitize the tcp stack

Below is the original message
With Eric and Sam's replays

Thanks again for the info


-----Original Message-----
From: Rich Bonfoey 
Sent: Thursday, March 31, 2005 9:55 AM
To: Sun Managers (
Subject: TCP_keepalive


Have any of you, had much dealings with the tcp_keepalive ?

On Solaris 8 and 9 the value is 7200000 or 2 hours.  What are  some of the
pit falls if this value was lowered to about 10 minutes.  I have read the
RFC but was looking for people who have had real experience with tweaking
this value.

Part of the reason for tweaking, is we have a large number of PC and OS 10
users connecting to several different systems and they have been having
performance issues.  Our dba decided to bring in a consultant ( that's
another story ) and they said this value should be 5 minutes.  I am not
quite buying it, as I have read that there are multiple opinion on the
correct use of tcp_keepalive.

Richard Bonfoey
The News Tribune
Information Systems
Successfully Meeting the Business Needs of
The News Tribune through Information Technology
sunmanagers mailing list
Received on Fri Apr 1 22:46:52 2005

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