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- Newsgroups: comp.sys.mac.system
- Path: sparky!uunet!zaphod.mps.ohio-state.edu!magnus.acs.ohio-state.edu!wbecktel
- From: wbecktel@magnus.acs.ohio-state.edu (Wayne J Becktel)
- Subject: PB 160/ Sys 7.1
- Message-ID: <1992Dec13.140741.21911@magnus.acs.ohio-state.edu>
- Keywords: cumulative system size
- Sender: news@magnus.acs.ohio-state.edu
- Nntp-Posting-Host: top.magnus.acs.ohio-state.edu
- Organization: The Ohio State University
- Distribution: usa
- Date: Sun, 13 Dec 1992 14:07:41 GMT
- Lines: 42
-
- I recently purchased a PB 160 4/80 and, in the course of exploring just
- what it is capable of, observed something odd. Assume no extensions are active
- and that everything else about this is purely vanilla. The System is 7.1, as
- shipped with and installed on the PB. The following is repeatable in terms a
- series of actions:
-
- ACTION SYS SIZE APP SIZE TOTAL DIFF
- ------------------------------------------------------------------
- start 1239 0 1239 0
- open desk top 1244 0 1244 5
- close desk top 1244 0 1244 5
- open teach text 1265 192 1457 218
- close 1246 0 1246 7
- open 1269 192 1461 222
- close 1251 0 1251 12
- sleep/restart 1269 0 1269 30
- open teach text 1293 192 1485 246
- close 1269 0 1269 30
- open resedit 1308 500 1808 569
- close 1290 0 1290 51
- ------------------------------------------------------------------
-
- There are several points here. First off, there appears to be a "memory
- effect" associated with the size of the system and what applications have been
- launched or exited. The increase of system size after a sleep/restart seems
- particularly odd. Next, the effect is cumulative. I have been able to get the
- system size to 2 MB with just the hard disk desk top, the alarm clock, the
- battery DA, and one floppy with desk top open. Recall that that is 1/2 of the
- total RAM in this PB. Finally, it gets worse as the size of the application
- increases. Not only does the size of the system balloon with the launch of the
- application, but the cumulative effect is a lot worse.
-
- Now, I am not a computer scientist, I am a biochemist. Having written
- that, I would be very much interested in an explanation of why one would design
- an operating system to do what is reproduced above. I haven't been able to
- reproduce this using my Mac IIcx with Sys 6.0.7. Off the cuff, it doesn't seem
- particularly desirable in limited memory systems to have an operating system
- which erodes usable memory with each action.
-
- Don't get me wrong in this, I like my PB 160 just fine. Perhaps, however,
- it is time to increase standard memory 8 MB. That's what I, for one, intend
- in the near future.
-