PHP memory_get_usage函数代码示例

 /**
  * Compute an estimate of available memory from memory limit and memory usage.
  * The memory limit value is extracted from php.ini configuration directive memory_limit, and converted to bytes.
  */
 public static function memory_get_available()
 {
     static $limit = null;
     if (!isset($limit)) {
         $inilimit = trim(ini_get('memory_limit'));
         if (empty($inilimit)) {
             // no limit set
             $limit = false;
         } elseif (ctype_digit($inilimit)) {
             $limit = (int) $inilimit;
         } else {
             $limit = (int) substr($inilimit, 0, -1);
             switch (strtolower(substr($inilimit, -1))) {
                 case 'g':
                     $limit *= 1024;
                 case 'm':
                     $limit *= 1024;
                 case 'k':
                     $limit *= 1024;
             }
         }
     }
     if ($limit !== false) {
         return $limit - memory_get_usage(true);
     } else {
         return false;
     }
 }

 public function stop()
 {
     $time = round(microtime(true) - $this->time_point, 5);
     $memory = round(memory_get_usage() - $this->memory_point, 5);
     $memory = $this->memory_format($memory);
     return array('time' => $time, 'memory' => $memory);
 }

 public function execute(CommandSender $sender, $currentAlias, array $args)
 {
     if (!$this->testPermission($sender)) {
         return true;
     }
     $chunksCollected = 0;
     $entitiesCollected = 0;
     $tilesCollected = 0;
     $memory = memory_get_usage();
     foreach ($sender->getServer()->getLevels() as $level) {
         $diff = [count($level->getChunks()), count($level->getEntities()), count($level->getTiles())];
         $level->doChunkGarbageCollection();
         $level->unloadChunks(true);
         $chunksCollected += $diff[0] - count($level->getChunks());
         $entitiesCollected += $diff[1] - count($level->getEntities());
         $tilesCollected += $diff[2] - count($level->getTiles());
         $level->clearCache(true);
     }
     $cyclesCollected = $sender->getServer()->getMemoryManager()->triggerGarbageCollector();
     $sender->sendMessage(TextFormat::GREEN . "---- " . TextFormat::WHITE . "Garbage collection result" . TextFormat::GREEN . " ----");
     $sender->sendMessage(TextFormat::GOLD . "Chunks: " . TextFormat::RED . number_format($chunksCollected));
     $sender->sendMessage(TextFormat::GOLD . "Entities: " . TextFormat::RED . number_format($entitiesCollected));
     $sender->sendMessage(TextFormat::GOLD . "Tiles: " . TextFormat::RED . number_format($tilesCollected));
     $sender->sendMessage(TextFormat::GOLD . "Cycles: " . TextFormat::RED . number_format($cyclesCollected));
     $sender->sendMessage(TextFormat::GOLD . "Memory freed: " . TextFormat::RED . number_format(round(($memory - memory_get_usage()) / 1024 / 1024, 2)) . " MB");
     return true;
 }

 /**
  * 显示运行时间、数据库操作、缓存次数、内存使用信息
  * @access private
  * @return string
  */
 private function showTime()
 {
     // 显示运行时间
     G('beginTime', $GLOBALS['_beginTime']);
     G('viewEndTime');
     $showTime = 'Process: ' . G('beginTime', 'viewEndTime') . 's ';
     if (C('SHOW_ADV_TIME')) {
         // 显示详细运行时间
         $showTime .= '( Load:' . G('beginTime', 'loadTime') . 's Init:' . G('loadTime', 'initTime') . 's Exec:' . G('initTime', 'viewStartTime') . 's Template:' . G('viewStartTime', 'viewEndTime') . 's )';
     }
     if (C('SHOW_DB_TIMES') && class_exists('Db', false)) {
         // 显示数据库操作次数
         $showTime .= ' | DB :' . N('db_query') . ' queries ' . N('db_write') . ' writes ';
     }
     if (C('SHOW_CACHE_TIMES') && class_exists('Cache', false)) {
         // 显示缓存读写次数
         $showTime .= ' | Cache :' . N('cache_read') . ' gets ' . N('cache_write') . ' writes ';
     }
     if (MEMORY_LIMIT_ON && C('SHOW_USE_MEM')) {
         // 显示内存开销
         $showTime .= ' | UseMem:' . number_format((memory_get_usage() - $GLOBALS['_startUseMems']) / 1024) . ' kb';
     }
     if (C('SHOW_LOAD_FILE')) {
         $showTime .= ' | LoadFile:' . count(get_included_files());
     }
     if (C('SHOW_FUN_TIMES')) {
         $fun = get_defined_functions();
         $showTime .= ' | CallFun:' . count($fun['user']) . ',' . count($fun['internal']);
     }
     return $showTime;
 }

/**
 * 获得查询次数以及查询时间
 *
 * @access  public
 * @return  string
 */
function insert_query_info()
{
    if ($GLOBALS['db']->queryTime == '') {
        $query_time = 0;
    } else {
        if (PHP_VERSION >= '5.0.0') {
            $query_time = number_format(microtime(true) - $GLOBALS['db']->queryTime, 6);
        } else {
            list($now_usec, $now_sec) = explode(' ', microtime());
            list($start_usec, $start_sec) = explode(' ', $GLOBALS['db']->queryTime);
            $query_time = number_format($now_sec - $start_sec + ($now_usec - $start_usec), 6);
        }
    }
    /* 内存占用情况 */
    if ($GLOBALS['_LANG']['memory_info'] && function_exists('memory_get_usage')) {
        $memory_usage = sprintf($GLOBALS['_LANG']['memory_info'], memory_get_usage() / 1048576);
    } else {
        $memory_usage = '';
    }
    /* 是否启用了 gzip */
    $gzip_enabled = gzip_enabled() ? $GLOBALS['_LANG']['gzip_enabled'] : $GLOBALS['_LANG']['gzip_disabled'];
    $online_count = $GLOBALS['db']->getOne("SELECT COUNT(*) FROM " . $GLOBALS['ecs']->table('sessions'));
    /* 加入触发cron代码 */
    $cron_method = empty($GLOBALS['_CFG']['cron_method']) ? '<img src="api/cron.php?t=' . gmtime() . '" alt="" style="width:0px;height:0px;" />' : '';
    return sprintf($GLOBALS['_LANG']['query_info'], $GLOBALS['db']->queryCount, $query_time, $online_count) . $gzip_enabled . $memory_usage . $cron_method;
}

 /**
  * Retrieve loaded category collection
  *
  * @return Mage_Eav_Model_Entity_Collection_Abstract
  */
 public function getLoadedProductCollectionpro($id)
 {
     // benchmarking
     $memory = memory_get_usage();
     $time = microtime();
     if (is_null($this->_productCollection)) {
         $layer = $this->getLayer();
         if ($this->getShowRootCategory()) {
             $this->setCategoryId(Mage::app()->getStore()->getRootCategoryId());
         }
         // if this is a product view page
         if (Mage::registry('product')) {
             // get collection of categories this product is associated with
             $categories = Mage::registry('product')->getCategoryCollection()->setPage(1, 1)->load();
             // if the product is associated with any category
             if ($categories->count()) {
                 // show products from this category
                 $this->setCategoryId(current($categories->getIterator()));
             }
         }
         $origCategory = null;
         if ($this->getCategoryId()) {
             $category = Mage::getModel('catalog/category')->load($this->getCategoryId());
             if ($category->getId()) {
                 $origCategory = $layer->getCurrentCategory();
                 $layer->setCurrentCategory($category);
                 $this->addModelTags($category);
             }
         }
         /* @var $layer Mage_Catalog_Model_Layer */
         /* @var $layer Mage_Catalog_Model_Layer */
         //$this->_productCollection = $layer->getProductCollection();
         /** @var $collection Mage_Catalog_Model_Resource_Product_Collection */
         $category = Mage::getModel('catalog/category')->load($this->_theCat);
         $this->_productCollection = Mage::getResourceModel('catalog/product_collection');
         // join sales order items column and count sold products
         $expression = new Zend_Db_Expr("SUM(oi.qty_ordered)");
         $condition = new Zend_Db_Expr("e.entity_id = oi.product_id AND oi.parent_item_id IS NULL");
         $this->_productCollection->addAttributeToSelect('*')->getSelect()->join(array('oi' => $this->_productCollection->getTable('sales/order_item')), $condition, array('sales_count' => $expression))->group('e.entity_id');
         //->order('sales_count' . ' ' . 'desc');
         $this->_productCollection->addFieldToFilter('status', '1');
         //join brand
         if ($this->getRequest()->getParam('brands_ids') != null and $this->getRequest()->getParam('brands_ids') != 0) {
             $brand_id = $this->getRequest()->getParam('brands_ids');
             $condition = new Zend_Db_Expr("br.option_id = {$brand_id} AND br.product_ids = e.entity_id");
             $this->_productCollection->getSelect()->join(array('br' => $this->_productCollection->getTable('shopbybrand/brand')), $condition, array('brand_id' => 'br.option_id'));
         }
         // join category
         $condition = new Zend_Db_Expr("e.entity_id = ccp.product_id");
         $condition2 = new Zend_Db_Expr("c.entity_id = ccp.category_id");
         $this->_productCollection->getSelect()->join(array('ccp' => $this->_productCollection->getTable('catalog/category_product')), $condition, array())->join(array('c' => $this->_productCollection->getTable('catalog/category')), $condition2, array('cat_id' => 'c.entity_id'));
         $condition = new Zend_Db_Expr("c.entity_id = cv.entity_id AND ea.attribute_id = cv.attribute_id");
         // cutting corners here by hardcoding 3 as Category Entiry_type_id
         $condition2 = new Zend_Db_Expr("ea.entity_type_id = 3 AND ea.attribute_code = 'name'");
         $this->_productCollection->getSelect()->join(array('ea' => $this->_productCollection->getTable('eav/attribute')), $condition2, array())->join(array('cv' => $this->_productCollection->getTable('catalog/category') . '_varchar'), $condition, array('cat_name' => 'cv.value'));
         $id = $this->getRequest()->getParam('id');
         $this->_productCollection->getSelect()->where('c.entity_id = ?', $id)->limit(20);
     }
     return $this->_productCollection;
 }

 public static function memory_usage()
 {
     $bytes = memory_get_usage();
     $kbytes = $bytes / 1024;
     $mbytes = $kbytes / 1024;
     return round($mbytes, 3);
 }

 /**
 +----------------------------------------------------------
 * 显示运行时间、数据库操作、缓存次数、内存使用信息
 +----------------------------------------------------------
 * @access private
 +----------------------------------------------------------
 * @return string
 +----------------------------------------------------------
 */
 private function showTime()
 {
     // 显示运行时间
     G('beginTime', $GLOBALS['_beginTime']);
     G('viewEndTime');
     $showTime = 'Process: ' . G('beginTime', 'viewEndTime') . 's ';
     // 显示详细运行时间
     $showTime .= '( Load:' . G('beginTime', 'loadTime') . 's Init:' . G('loadTime', 'initTime') . 's Exec:' . G('initTime', 'viewStartTime') . 's Template:' . G('viewStartTime', 'viewEndTime') . 's )';
     // 显示数据库操作次数
     if (class_exists('Db', false)) {
         $showTime .= ' | DB :' . N('db_query') . ' queries ' . N('db_write') . ' writes ';
     }
     // 显示缓存读写次数
     if (class_exists('Cache', false)) {
         $showTime .= ' | Cache :' . N('cache_read') . ' gets ' . N('cache_write') . ' writes ';
     }
     // 显示内存开销
     if (MEMORY_LIMIT_ON) {
         $showTime .= ' | UseMem:' . number_format((memory_get_usage() - $GLOBALS['_startUseMems']) / 1024) . ' kb';
     }
     // 显示文件加载数
     $showTime .= ' | LoadFile:' . count(get_included_files());
     // 显示函数调用次数 自定义函数,内置函数
     $fun = get_defined_functions();
     $showTime .= ' | CallFun:' . count($fun['user']) . ',' . count($fun['internal']);
     return $showTime;
 }

function on_complete($req)
{
    echo "request complete: " . evhttp_request_status($req) . "\n";
    //echo evhttp_request_body($req)."\n";
    evhttp_request_free($req);
    echo memory_get_usage() . "\n\n";
}

 protected function execute($arguments = array(), $options = array())
 {
     if (!$this->safeToRun()) {
         print "Process already running!\n";
         die;
     }
     $timer = sfTimerManager::getTimer('execute');
     $databaseManager = new sfDatabaseManager($this->configuration);
     $databaseManager->initialize($this->configuration);
     //set up index
     $index = EntityTable::getLuceneIndex();
     //delete deleted entities
     $q = LsDoctrineQuery::create()->from('Entity e')->where('e.is_deleted = ?', true)->setHydrationMode(Doctrine::HYDRATE_ARRAY);
     foreach ($q->execute() as $entity) {
         if ($hits = $index->find('key:' . $entity['id'])) {
             if ($options['debug_mode']) {
                 printf("Deleting index for Entity %s\n", $entity['id']);
             }
             foreach ($hits as $hit) {
                 $index->delete($hit->id);
             }
         }
     }
     printf("Memory used: %s\n", LsNumber::makeBytesReadable(memory_get_usage()));
     printf("Index size: %s\n", $index->count());
     $timer->addTime();
     printf("Run time: %s\n", $timer->getElapsedTime());
     sfTimerManager::clearTimers();
 }

 protected function init()
 {
     try {
         $this->data['timestamp'] = time();
         $this->data['direction'] = waRequest::post('direction', 'import');
         $type_model = new shopTypeModel();
         $this->data['types'] = array_map('intval', array_keys($type_model->getTypes()));
         switch ($this->data['direction']) {
             case 'export':
                 $this->initExport();
                 break;
             case 'import':
             default:
                 $this->data['direction'] = 'import';
                 $this->initImport();
                 break;
         }
         $stages = array_keys($this->data['count']);
         $this->data['current'] = array_fill_keys($stages, 0);
         $value = $this->data['direction'] == 'import' ? $this->emulate(null) ? array('add' => 0, 'found' => 0, 'skip' => 0, 'rights' => 0, 'currency' => 0) : array('new' => 0, 'update' => 0, 'skip' => 0, 'error' => 0, 'rights' => 0, 'currency' => 0) : 0;
         $this->data['processed_count'] = array_fill_keys($stages, $value);
         $this->data['map'] = array();
         $this->data['memory'] = memory_get_peak_usage();
         $this->data['memory_avg'] = memory_get_usage();
         $this->data['timestamp'] = time();
     } catch (waException $ex) {
         $this->error($ex->getMessage());
         echo $this->json(array('error' => $ex->getMessage()));
         exit;
     }
 }

 /**
  * Returns the current memory usage in MB
  * @param int $precision 1-8 (default 4)
  * @return float
  */
 public static function getMemoryUsage($precision = 4)
 {
     if (!is_int($precision) || $precision < 1 || $precision > 8) {
         $precision = 4;
     }
     return number_format(memory_get_usage() / 1024 / 1024, $precision);
 }

 /**
  *
  * @param nc_search_indexer $indexer
  * @param $cycle_number
  * @return boolean TRUE: остановка для перезапуска, FALSE: продолжение выполнения
  */
 protected function interrupt_if_needed(nc_search_indexer $indexer, $cycle_number)
 {
     $memory_use = function_exists('memory_get_usage') ? memory_get_usage() : 0;
     $time_use = time() + $this->delay - $this->start_time;
     $out_of_memory = $out_of_time = false;
     // проверяем память
     if ($this->memory_threshold > 0) {
         if ($this->memory_threshold <= 1) {
             // относительные значения
             $out_of_memory = $memory_use / $this->memory_limit >= $this->memory_threshold;
         } else {
             // абсолютные значения
             $out_of_memory = $memory_use >= $this->memory_threshold;
         }
     }
     // проверяем время
     if ($this->time_threshold > 0) {
         if ($this->time_threshold <= 1) {
             // относительные значения
             // 'max_execution_time' ($this->time_limit) может быть равен 0 при запуске из консоли
             $out_of_time = $this->time_limit && $time_use / $this->time_limit >= $this->time_threshold;
         } else {
             // абсолютные значения
             $out_of_time = $time_use >= $this->time_threshold;
         }
     }
     // проверяем ограничение на количество циклов
     $is_last_cycle = $this->cycle_limit > 0 && $cycle_number > $this->cycle_limit;
     // останавливаемся, когда достигли лимита
     if ($out_of_memory || $out_of_time || $is_last_cycle) {
         $indexer->interrupt("mem: {$memory_use} bytes; time: {$time_use} s");
         return true;
     }
     return false;
 }

 public function detalleAction($nid, $position = 1)
 {
     $start_memory = memory_get_usage();
     /*$nota = new \Rpp\Pages\Nota($nid,$this->dispatcher);                                 
       $di = new Phalcon\DI();
       $nota->package ='nota';
       $nota->set_position($position);
       $di->setShared('model',$nota);
       $di->setShared('viewCache',$this->viewCache);
       $this->view->setDI($di);
       
       $Analytics = new \Rpp\Services\Analytics\Visits\Load\Nota($nid);
       $Analytics->calculate();*/
     if (!Rpp\Pages\Nota::validate($nid)) {
         $this->dispatcher->forward(array('controller' => 'error', 'action' => 'show404'));
     }
     $nota = function () use($nid) {
         return new \Rpp\Pages\Nota($nid);
     };
     $di = new Phalcon\DI();
     $di->set('model', $nota);
     $di->set('viewCache', $this->viewCache);
     $this->view->setDI($di);
     $Analytics = new \Rpp\Services\Analytics\Visits\Load\Nota($nid);
     $Analytics->calculate();
     //var_dump( memory_get_usage() - $start_memory );die();
 }

/**
 * Initializes our performance info early.
 *
 * Pairs up with get_performance_info() which is actually
 * in moodlelib.php. This function is here so that we can 
 * call it before all the libs are pulled in. 
 *
 * @uses $PERF
 */
function init_performance_info()
{
    global $PERF, $CFG, $USER;
    $PERF = new Object();
    $PERF->dbqueries = 0;
    $PERF->logwrites = 0;
    if (function_exists('microtime')) {
        $PERF->starttime = microtime();
    }
    if (function_exists('memory_get_usage')) {
        $PERF->startmemory = memory_get_usage();
    }
    if (function_exists('posix_times')) {
        $PERF->startposixtimes = posix_times();
    }
    if (function_exists('apd_set_pprof_trace')) {
        // APD profiling
        if ($USER->id > 0 && $CFG->perfdebug >= 15) {
            $tempdir = $CFG->dataroot . '/temp/profile/' . $USER->id;
            mkdir($tempdir);
            apd_set_pprof_trace($tempdir);
            $PERF->profiling = true;
        }
    }
}