laipower/wp-content/plugins/w3-total-cache/UsageStatistics_Sources_Apc.php

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<?php
namespace W3TC;
class UsageStatistics_Sources_Apc {
private $module_names = array();
public function __construct( $server_descriptors ) {
foreach ( $server_descriptors as $module_key => $i ) {
$this->module_names[] = $i['name'];
}
}
public function get_snapshot() {
$cache = apcu_cache_info();
return array(
'items' => $cache['num_entries'],
'size_used' => $cache['mem_size'],
'get_hits' => $cache['num_hits'],
'get_total' => ( $cache['num_hits'] + $cache['num_misses'] )
);
}
public function get_summary() {
$cache = apcu_cache_info();
$time = time();
$runtime = $time - $cache['start_time'];
$mem = apcu_sma_info();
$mem_size = $mem['num_seg'] * $mem['seg_size'];
$mem_avail = $mem['avail_mem'];
$mem_used = $mem_size - $mem_avail;
$sum = array(
'used_by' => implode( ',', $this->module_names ),
'items' => $cache['num_entries'],
'size_used' => Util_UsageStatistics::bytes_to_size( $cache['mem_size'] ),
'get_hits' => $cache['num_hits'],
'get_total' => ( $cache['num_hits'] + $cache['num_misses'] ),
'runtime_secs' => $runtime,
'evictions' => $cache['expunges'],
'size_percent' => Util_UsageStatistics::percent(
$mem_used, $mem_avail )
);
if ( $sum['runtime_secs'] != 0 ) {
$sum['requests_per_second'] = sprintf( '%.2f',
$sum['get_total'] / $sum['runtime_secs'] );
}
$sum['get_hit_rate'] = Util_UsageStatistics::percent2(
$sum, 'get_hits', 'get_total' );
return $sum;
}
}