Microsoft KB Archive/115518

= FFAPI: Memory Usage for MS-DOS Get and Put Executable Files =

Article ID: 115518

Article Last Modified on 10/30/2006

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APPLIES TO


 * Microsoft Mail Gateway to FFAPI 2.1
 * Microsoft Mail Gateway to FFAPI 3.0

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This article was previously published under Q115518



SUMMARY
The Microsoft Mail File Format Application Programming Interface (FFAPI) runs in conventional memory. Since MS-DOS and network drivers also run in the same memory, sometimes you may not be able to load or run FFAPI.

FFAPI loads the following files into memory:   GLB\NETWORK.GLB XTN\*.XTN GLB\GROUP.GLB GLB\ACCESS2.GLB As more postoffice users are added, memory available to process messages decreases.



MORE INFORMATION
Approximate memory usage breakdown:


 * 1) Locally defined users take 35 bytes each.
 * 2) Locally defined groups take 31 bytes each.
 * 3) Each local user defined as a remote call requesters take an additional 36 bytes each.
 * 4) Any gateway access component takes 90 bytes each.
 * 5) Directly defined and indirectly defined postoffices each take 100.5 bytes.
 * 6) Any of those defined postoffices that are connected by Modem or X.25 take an additional 48.6 bytes.

Additional query words: 2.10 3.00

Keywords: KB115518

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