On Tue, 27 Apr 2010 07:53:39 -0400, Richards, Robert B. <[email protected]> wrote:
>Cross post (IBM-Main and TCPIP) > >We are experiencing an unusual situation and I am wondering if anyone else has seen this at their shop. As phrased by my boss: > >"We are currently experience a client timeout with HATS applications. I'm calling it a client timeout because the CICS session associated with the user is active but the user received a timeout message. This issue is only with HATS applications and cross over business application lines." > >My TCP/IP guy wants to implement NODELAYACKS for specific ports for problem resolution per the following IBM recommendation for TCP/IP WAS performance tuning: > >- Consider specifying NODELAYACKS for ports. This may improve throughput for more trivial transactions, but it does add more overhead for more complex transactions. Using this option will cause the acknowledgments (ACKs) to be sent back immediately to the client, rather than waiting for more data to accumulate. > >Because CICS still has the session as active, it holds on to the client's too long and, as you might expect, that has a bad ripple effect until CICS terminates the task at its timeout. > >Any takers? :) > Hi Bob, I checked out the WAS LPARs from 2 different sysplexes / companies and one has it specified but the other one has this in the TCP/IP parms: 11/30/07 xxx Removed NODELAYACKS per Washington Flash 10621 I haven't looked at what that flash says, but I will (I'm sure you will too). Mark -- Mark Zelden - Zelden Consulting Services - z/OS, OS/390 and MVS mailto:[email protected] Mark's MVS Utilities: http://home.flash.net/~mzelden/mvsutil.html Systems Programming expert at http://expertanswercenter.techtarget.com/ ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
