lsr@apple.UUCP (Larry Rosenstein) (10/30/87)
In article <2113@sputnik.COM> moriarty@tc.fluke.COM (Jeff Meyer) writes: > >It [Multifinder] always shows the System file as taking up some memory. >Anyone know if the amount of memory the System file takes up is any greater >if you have more DAs and Fonts stored in the System file, i.e. size of >System File is proportional to the amount of RAM reserved for it in >Multifinder? If it does take up more room, than Suitcase can save you >substantial amounts of memory. I think the number shown under 'System' indicates the amount of memory that is allocated to something other than applications. The System heap, RAM cache, Macsbug, etc. all contribute towards this figure. For the most part, everything except the System heap size is fixed. Under Multifinder, the System heap can grow and shrink (provided nothing is in the way). Resource maps are allocated in the System heap, so as the map for the System file grows, the amount of memory required in the System heap grows. The incremental overhead (in the map) for adding a resource is 12 bytes plus the size of the resource name (if any). Therefore, adding fonts and DAs will increase the memory required by the System. I don't know how Suitcase works. If it keeps all the DA & font resource files open, then it will increase the memory usage, since there will be several resource maps in memory at once. If it only opens one file at a time (as it needs it), then the memory requirements will be less. -- Larry Rosenstein Object Specialist Apple Computer AppleLink: Rosenstein1 UUCP: {sun, voder, nsc, mtxinu, dual}!apple!lsr CSNET: lsr@Apple.com