The question was:
>>During a course at Sun, we were told to change the following parameters
>>in /usr/sys/sun4c/vmparam.c:
>>
>>/*
>> * Paging thresholds (see vm_pageout.c).
>> * Strategy of 3/17/83:
>> * lotsfree is 256k bytes, but at most 1/8 of memory
>> * desfree is 100k bytes, but at most 1/16 of memory
>> * minfree is 32k bytes, but at most 1/2 of desfree
>> */
>>#define LOTSFREE (256 * 1024)
>>#define LOTSFREEFRACT 8
>>#define DESFREE (100 * 1024)
>>#define DESFREEFRACT 16
>>#define MINFREE (32 * 1024)
>>#define MINFREEFRACT 2
>>
>>Do sun-managers have hints on the way to change these parameters
>>for memory larger than 2Mb? Do I simply multiply by 8 for a 16Mb memory?
The answer is in SunOS 4.1.3:
* Modified on 9/24/90: (seven YEARS later?????)
* Memory systems are bigger, processors are faster; we
* probably need more elbowroom. Multiplied all the
* default values by eight.
*/
#define LOTSFREE (2048 * 1024)
#define LOTSFREEFRACT 8
#define DESFREE (800 * 1024)
#define DESFREEFRACT 16
#define MINFREE (512 * 1024)
#define MINFREEFRACT 2
Jacques Beigbeder | Internet: beig@ens.fr
Service de Prestations Informatiques | Bitnet : beig@frulm63
Ecole Normale Superieure | Tel : (33-1) 44-32-37-96
F75230 Paris Cedex 05 | Fax : (33-1) 44-32-20-80
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