Greeetings
We had a similar issue. If you are using CICS Web Services look at PM04061:
CICS WEB SERVICES PERFORMANCE. TCP/IP NAGLE ALGORITHM RESULTS INUNNECESSARY
DELAYS. See if this could be your issue.
Regards,
Jihad K. Kawkabani
IT Systems Engineer Consultant
Voice: 440.395.0740
Network: 575.0740
Cell: 440.465.2969
"Richards, Robert
B."
<Robert.Richards@ To
OPM.GOV> IBM-MAIN@bama.ua.edu
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Mainframe
Discussion List Subject
<ibm-m...@bama.ua HATS client timeout/performance
.edu> issue
04/27/2010 07:53
AM
Please respond to
IBM Mainframe
Discussion List
<ibm-m...@bama.ua
.edu>
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? :)
Bob
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