TRANSFER Installation and Management Guide

What to Do When Mail Is Not Delivered
Troubleshooting
12–4 13198 Tandem Computers Incorporated
If the item is in a folder, from the TMANAGER MAIN MENU screen press
F11 to get the FOLDER SCAN screen. Select the item with the cursor; then
press F12 to get the ITEM TRACE screen and trace the item.
From the ITEM TRACE screen, press F7 to get the RECIPIENT SELECT screen
and then F4 to get the RECIPIENT DISPLAY screen for the first recipient.
Check the status of the recipients.
You can also use TMANAGER to configure database sampling so that you are
warned if a file size exceeds a specified threshold. With this warning, you can take
action before you get an error 45 telling you a file is full. Section 10 of this guide
explains how you configure database sampling, file thresholds, and alarm
notification.
Other steps you can take if mail is not delivered promptly on your node include:
You can check the system load balancing of the following TRANSFER system
components: TAREQ-TCPs, TWORKs, TRECVs, TISERV-ASYNCs.
For some multinode TRANSFER systems, you can set the TWORK
RMTTSCHEDHOLD parameter to 32767 minutes, causing TWORKs to hold
network OPENs to remote TSCHEDs indefinitely and thus improving network
TRANSFER performance.
To determine which TRANSFER systems can have this parameter setting, use this
algorithm: the number of local TISERVs + TAREQs + TFRONTs + TRECVs +
SMSERV (1) on the largest TRANSFER node + the total number of TWORKs on all
the TRANSFER nodes must be <= 250. For example, if you have 50 nodes with 4
TWORKs on each node, and the largest node has 8 TISERVs, 4 TAREQs, 2
TFRONTs, 2 TRECVs, 1 SMSERVs, you calculate the maximum number of
TSCHED openers as follows:
8 + 4 + 2 + 2 + 1 + 50 x 4 = 217
which is less than 250. Because all these processes can open TSCHED, which has
250 entries in its opener table, the limit is 250.
This method generally works for networks of up to 50 TRANSFER nodes, serving
up to 2500 active users. If you have a larger network, consider your data
communications bandwidth and network topology.