1<h2>vm_statistics</h2> 2<hr> 3<p> 4<strong>Structure</strong> - Defines statistics for the kernel's use of virtual memory. 5<h3>SYNOPSIS</h3> 6<pre> 7<strong>struct vm_statistics</strong> 8<strong>{</strong> 9 <strong>integer_t</strong> <var>free_count</var><strong>;</strong> 10 <strong>integer_t</strong> <var>active_count</var><strong>;</strong> 11 <strong>integer_t</strong> <var>inactive_count</var><strong>;</strong> 12 <strong>integer_t</strong> <var>wire_count</var><strong>;</strong> 13 <strong>integer_t</strong> <var>zero_fill_count</var><strong>;</strong> 14 <strong>integer_t</strong> <var>reactivations</var><strong>;</strong> 15 <strong>integer_t</strong> <var>pageins</var><strong>;</strong> 16 <strong>integer_t</strong> <var>pageouts</var><strong>;</strong> 17 <strong>integer_t</strong> <var>faults</var><strong>;</strong> 18 <strong>integer_t</strong> <var>cow_faults</var><strong>;</strong> 19 <strong>integer_t</strong> <var>lookups</var><strong>;</strong> 20 <strong>integer_t</strong> <var>hits</var><strong>;</strong> 21<strong>};</strong> 22 23<strong>typedef struct vm_statistics* vm_statistics_t;</strong> 24</pre> 25<h3>FIELDS</h3> 26<dl> 27<dt> <var>free_count</var> 28<dd> 29The total number of free pages in the system. 30<p> 31<dt> <var>active_count</var> 32<dd> 33The total number of pages currently in use and pageable. 34<p> 35<dt> <var>inactive_count</var> 36<dd> 37The number of inactive pages. 38<p> 39<dt> <var>wire_count</var> 40<dd> 41The number of pages that are wired in memory and cannot be paged 42out. 43<p> 44<dt> <var>zero_fill_count</var> 45<dd> 46The number of zero-fill pages. 47<p> 48<dt> <var>reactivations</var> 49<dd> 50The number of reactivated pages. 51<p> 52<dt> <var>pageins</var> 53<dd> 54The number of requests for pages from a pager (such as the i-node 55pager). 56<p> 57<dt> <var>pageouts</var> 58<dd> 59The number of pages that have been paged out. 60<p> 61<dt> <var>faults</var> 62<dd> 63The number of times the <strong>vm_fault</strong> routine has been called. 64<p> 65<dt> <var>cow_faults</var> 66<dd> 67The number of copy-on-write faults. 68<p> 69<dt> <var>lookups</var> 70<dd> 71The number of object cache lookups. 72<p> 73<dt> <var>hits</var> 74<dd> 75The number of object cache hits. 76</dl> 77<h3>DESCRIPTION</h3> 78<p> 79The <strong>vm_statistics</strong> structure defines the statistics 80available on the kernel's use of 81virtual memory. The statistics record virtual memory usage since 82the kernel was booted. 83<p> 84For related information for a specific task, see the <strong>task_basic_info</strong> 85structure. 86<h3>NOTES</h3> 87<p> 88This structure is machine word length specific because of the memory sizes 89returned. 90<h3>RELATED INFORMATION</h3> 91<p> 92Functions: 93<a href="task_info.html"><strong>task_info</strong></a>, 94<a href="host_page_size.html"><strong>host_page_size</strong></a>. 95<p> 96Data Structures: 97<a href="task_basic_info.html"><strong>task_basic_info</strong></a>. 98 99