Microsoft KB Archive/78803

= PC Ext: Memory Requirements for the External Mail Program =

Article ID: 78803

Article Last Modified on 10/30/2006

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APPLIES TO


 * Microsoft Mail for PC Networks 2.1
 * Microsoft Mail for PC Networks 3.0
 * Microsoft Mail for PC Networks 3.2
 * Microsoft Mail for PC Networks 3.5

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This article was previously published under Q78803



SUMMARY
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:

  General Memory Requirements      Memory    Needed For --   --

200K     EXTERNAL.EXE 64K      message storage 16K      modem traffic --

280K     general memory required   External Postoffice Servicing Requirements (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 

Additional query words: 2.10 3.00 3.20 3.50 memory requirements

Keywords: KB78803

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