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The target system CPU pegged? The receiving jobs have enough memory in their pool? The receiving jobs have the appropriate run priority and timeslice? You have enough disk arms to support the file transactions? What is the sending and receiving system? We mirror an application between 3 systems. System A was a model 400, B a 510, and C a 170. The 170 was remote via 56k SDLC directly to the 510. The 510 would backup to the 400 which was 10M Half on a cross-over cable to the 510 while the 170 kept up. Gee the 56k SDLC out ran the 10M Half. Why, the 400 just could not keep up. Now that we have upgraded the 400 to a 170, well the 56K SDLC line looses out during peak transaction processing or mass updates. Chris -----Original Message----- From: mgarton@xxxxxxxxxxxxxxx [mailto:mgarton@xxxxxxxxxxxxxxx] Sent: Wednesday, April 23, 2003 11:08 AM To: Midrange Systems Technical Discussion Subject: RE: TCP/IP Performance Chris, The MTU on the line is 1496. On the routers it is 1500. For today the average packet size being transmitted was 1348 bytes. Our network person says everything looks okay on the router on the receiving end. I am not sure how I would check if it is bottle necked on the target system. Mark Garton DR Team Leader O'Reilly Auto Parts
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