ID: Q78803
2.10 3.00 3.20 3.50 MS-DOS kbenv
The information in this article applies to:
You can use the following formula to estimate how much memory the Microsoft Mail for PC Networks External Mail program (EXTERNAL.EXE) will require to run without memory problems.
There are two major categories of memory usage for EXTERNAL.EXE:
1. General Memory Requirements
Memory Needed For
------ ----------------------
200K EXTERNAL.EXE
64K message storage
16K modem traffic
------
280K general memory required
(Servicing memory is required for mail dispatching, and so on.)
The servicing memory requirements will vary directly with the number of
postoffices that External is addressing. The servicing memory
requirements need to be calculated for each postoffice separately
because the number of external networks will be different.
The following figures can be used to determine each postoffice's
servicing requirements:
Number of Local Users Multiplied (*) by 37 bytes
Number of dispatch networks Multiplied (*) by 38 bytes
Number of dispatch postoffices Multiplied (*) by 90 bytes
Number of external networks Multiplied (*) by 45 bytes
Number of external postoffices Multiplied (*) by 115 bytes
Number of gateways Multiplied (*) by 83 bytes
Number of gateway nodes/DGNs Multiplied (*) by 83 bytes
For example:
The following example will show the EXTERNAL.EXE memory requirements
dispatching between two postoffices, each with 100 users defined. No
gateways are involved.
General External Memory Requirements
200K base EXTERNAL.EXE
64K for message storage
16K for modem traffic
----
280K General Memory Requirements
Servicing Requirements for two postoffices
Postoffice 1
------------
100 local users * 37 = 3700 bytes
+ 1 dispatch networks * 38 = 38 bytes
+ 1 dispatch postoffice * 90 = 90 bytes
+ 2 external networks * 45 = 90 bytes
+ 10 external postoffices * 115 = 1150 bytes
+ 0 gateways * 83 = 0 bytes
+ 0 gateway nodes/DGNs * 83 = 0 bytes
----
5068 bytes
Postoffice 2
------------
100 local users * 37 = 3700 bytes
+ 1 dispatch networks * 38 = 38 bytes
+ 1 dispatch postoffice * 90 = 90 bytes
+ 1 external networks * 45 = 45 bytes
+ 1 external postoffices * 115 = 115 bytes
+ 0 gateways * 83 = 0 bytes
+ 0 gateway nodes/DGNs * 83 = 0 bytes
----
+ 3988 bytes
Total External PO Requirements = 9056 bytes
Total External Requirements = 289,056 bytes
Keywords : kbenv
Version : 2.10 3.00 3.20 3.50
Platform : MS-DOSLast Reviewed: September 24, 1997