Description:
------------
apc.php's charts and info show different results at random 
on a dev vm that I use alone. Obviously files are cached but 
the amount of used cache, hits and misses differs at random. 
More precisely, the number of elements in the blocklists 
part of the output jumps from 2 to 5. Output on the same 
instance for two requests:


array(4) {
  ["num_seg"]=>
  int(1)
  ["seg_size"]=>
  float(134217648)
  ["avail_mem"]=>
  float(123928136)
  ["block_lists"]=>
  array(1) {
    [0]=>
    array(2) {
      [0]=>
      array(2) {
        ["size"]=>
        int(608)
        ["offset"]=>
        int(9728536)
      }
      [1]=>
      array(2) {
        ["size"]=>
        int(123927504)
        ["offset"]=>
        int(10290176)
      }
    }
  }
}

---> says ~9mb are used


array(4) {
  ["num_seg"]=>
  int(1)
  ["seg_size"]=>
  float(134217648)
  ["avail_mem"]=>
  float(105328560)
  ["block_lists"]=>
  array(1) {
    [0]=>
    array(5) {
      [0]=>
      array(2) {
        ["size"]=>
        int(608)
        ["offset"]=>
        int(28074992)
      }
      [1]=>
      array(2) {
        ["size"]=>
        int(440)
        ["offset"]=>
        int(25959000)
      }
      [2]=>
      array(2) {
        ["size"]=>
        int(552)
        ["offset"]=>
        int(24897352)
      }
      [3]=>
      array(2) {
        ["size"]=>
        int(1656)
        ["offset"]=>
        int(28071152)
      }
      [4]=>
      array(2) {
        ["size"]=>
        int(105325280)
        ["offset"]=>
        int(28892400)
      }
    }
  }
}

---> says 27mb are used

Reproduce code:
---------------
<?php
//try this a couple of times
$mem=apc_sma_info();
echo '<pre>';
var_dump( $mem );
?>

Expected result:
----------------
I expect to get the same results for every call, or at least 
somewhat similar results

Actual result:
--------------
completely different values which confuse and annoy me!