113  * A swapped in process is given a small amount of core without being bothered
 114  * by the page replacement algorithm. Basically this says that if you are
 115  * swapped in you deserve some resources. We protect the last SAFERSS
 116  * pages against paging and will just swap you out rather than paging you.
 117  * Note that each process has at least UPAGES pages which are not
 118  * paged anyways so this number just means a swapped in process is
 119  * given around 32k bytes.
 120  */
 121 /*
 122  * nominal ``small'' resident set size
 123  * protected against replacement
 124  */
 125 #define SAFERSS         3
 126 
 127 /*
 128  * DISKRPM is used to estimate the number of paging i/o operations
 129  * which one can expect from a single disk controller.
 130  *
 131  * XXX - The system doesn't account for multiple swap devices.
 132  */
 133 #define DISKRPM         60
 134 
 135 /*
 136  * The maximum value for handspreadpages which is the the distance
 137  * between the two clock hands in pages. This is only used when the page
 138  * scanner is first started.
 139  */
 140 #define MAXHANDSPREADPAGES      ((64 * 1024 * 1024) / PAGESIZE)
 141 
 142 /*
 143  * Paged text files that are less than PGTHRESH bytes
 144  * may be "prefaulted in" instead of demand paged.
 145  */
 146 #define PGTHRESH        (280 * 1024)
 147 
 148 #ifdef  __cplusplus
 149 }
 150 #endif
 151 
 152 #endif  /* _SYS_VM_MACHPARAM_H */

 113  * A swapped in process is given a small amount of core without being bothered
 114  * by the page replacement algorithm. Basically this says that if you are
 115  * swapped in you deserve some resources. We protect the last SAFERSS
 116  * pages against paging and will just swap you out rather than paging you.
 117  * Note that each process has at least UPAGES pages which are not
 118  * paged anyways so this number just means a swapped in process is
 119  * given around 32k bytes.
 120  */
 121 /*
 122  * nominal ``small'' resident set size
 123  * protected against replacement
 124  */
 125 #define SAFERSS         3
 126 
 127 /*
 128  * DISKRPM is used to estimate the number of paging i/o operations
 129  * which one can expect from a single disk controller.
 130  *
 131  * XXX - The system doesn't account for multiple swap devices.
 132  */
 133 #define DISKRPM         600
 134 
 135 /*
 136  * The maximum value for handspreadpages which is the the distance
 137  * between the two clock hands in pages. This is only used when the page
 138  * scanner is first started.
 139  */
 140 #define MAXHANDSPREADPAGES      ((64 * 1024 * 1024) / PAGESIZE)
 141 
 142 /*
 143  * Paged text files that are less than PGTHRESH bytes
 144  * may be "prefaulted in" instead of demand paged.
 145  */
 146 #define PGTHRESH        (280 * 1024)
 147 
 148 #ifdef  __cplusplus
 149 }
 150 #endif
 151 
 152 #endif  /* _SYS_VM_MACHPARAM_H */