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Mark, has anything been done with input/output buffer sizes in CHGTCPA? Also, be sure to set the maximum MTU to the appropriate size for the kind of line you have. Your network person should be able to see if packets are being split up and reassembled. The Ethernet used on AS/400 usually wants 1492, and line descriptions for that usually are set at 1496. ATM and other connectivity types use a different value.

HTH

Vern

At 09:07 AM 4/23/2003 -0500, you wrote:
My company is running one of the High Availability products to replicate
(via sockets) our corporate system to our DR system in a data center 400
miles away.  We have a 9 Mbps WAN link that is dedicated to this process.
The problem is that we are not able to fully utilize the pipe even though
the HA product shows that there are transactions backed up waiting to be
sent.  Currently we are only able to utilize 5 to 6 Mb of the pipe.  We
have ran performance reports on production system (model 830, V5R2) and
there are no errors on the line and the IOP is not over utilized.  We have
set up a separate memory pool for the HA application.  It doesn't seem to
make a difference if the system is busy or not.  I have tried working with
the HA product vendor, our network people, and the communications vendor
and nobody has found anything problems.  Does anyone have any other
suggestions?  I was wondering if there is something that we could tweak in
the TCP attributes on the production system to get better throughput.
Thanks in advance.


Mark Garton Disaster Recovery Team Leader O'Reilly Auto Parts



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