Mysqli結果Fetch_Row內存泄漏

Question

我使用mysqli API查詢一個大表，每1000行，但我的服務器的內存增長非常快。內存是0，甚至交換。我不知道如何解決它。

表擁有400萬行，所以我用1000

這裏是我的代碼，每次查詢表：

<?php 
    ini_set('memory_limit','32M'); 
    $config = require_once('config.php'); 
    $attachmentRoot = $config['attachment_root']; 
    $mysqli = new mysqli($config['DB_HOST'],$config['DB_USER'],$config['DB_PASSWORD'],$config['DB_NAME']); 
    $mysqli->set_charset('gbk'); 
    if(!$mysqli) 
     throw new Exception('DB connnect faild:'.mysqli_connect_errno().mysqli_connect_error()); 
    echo "\nRename The Dup Files With Suffix: .es201704111728es \n"; 
    $startTime = microtime(true); 
    /** 
    * 
    * Move dup file to $name + .es201704111728es 
    */ 
    $suffix = ".es201704111728es"; 
    $fileLinesLimit = 100000; 
    $listSuffix = 0; 
    $lines = 0; 
    /** 
    * Create File List. 
    */ 
    $fileList = '/tmp/Dupfilelist.txt'; 
    $baseListName = $fileList.$listSuffix; 
    //$fs = fopen($baseListName,'w'); 
    $totalSize = 0; 
    $start = 0; 
    $step = 10000; 
    $sql = "SELECT id,filepath,ids,duplicatefile,filesize FROM duplicate_attachment WHERE id> $start AND duplicatefile IS NOT NULL LIMIT $step"; 
    $result = $mysqli->query($sql); 
    while($result->num_rows > 0) 
    { 
     while($result->fetch_row()) 
     { 
      /*$fiepath = $row[1]; 
      $uniqueIdsArray = array_unique(explode(',',$row[2]));if(empty($row[3]))throw new \Exception("\n".'ERROR:'.$row[0]."\n".var_export($row[3],true)."\n"); 
      $uniqueFilesArray = array_unique(explode(',',$row[3])); 
      $hasFile = array_search($fiepath,$uniqueFilesArray); 
      if($hasFile !== false) 
       unset($uniqueFilesArray[$hasFile]); 
      $num = count($uniqueIdsArray); 
      $fileNum = count($uniqueFilesArray); 
      $ids = implode(',',$uniqueIdsArray); 
      if($num>1 && $fileNum>0){ 
       //echo "\nID: $row[0] . File Need To Rename:".var_export($uniqueFilesArray,true)."\n"; 

       $size = intval($row[4]); 
       if($lines >= $fileLinesLimit){ 
        $lines = 0; 
        $listSuffix++; 
        //$fileList .= $listSuffix; 

       } 

       array_map(function($file) use ($attachmentRoot,$suffix,$fiepath,$totalSize,$size,$fileLinesLimit,&$listSuffix,&$lines,$fileList){ 
        //$fs = fopen($fileList.$listSuffix,'a'); 
        if($file === $fiepath) 
         return -1; 
        $source = $file; 
        $target = $source.$suffix; 
        //rename($source,$target); 
        //fwrite($fs,$source.','.$target."\n"); 
        //file_put_contents($fileList.$listSuffix, $source.','.$target."\n",FILE_APPEND); 
        //$totalSize += intval($size); 
        $lines ++; 
        //echo memory_get_usage()."\n"; 
        //fclose($fs); 
        //unset($fs); 



        //try to write file without amount memory cost 
        //$ts = fopen('/tmp/tempfile-0412','w'); 



       },$uniqueFilesArray); 
       //echo "Test Just One Attachment Record.\n"; 
       //echo "Ids:$ids\n"; 
       //exit(); 
      }*/ 
     } 

    echo memory_get_peak_usage(true)."\n"; 

     if(!$mysqli->ping()) 
     { 
      echo "Mysql Conncect Failed.Reconnecting.\n"; 
      $mysqli = new mysqli($config['DB_HOST'],$config['DB_USER'],$config['DB_PASSWORD'],$config['DB_NAME']); 
      $mysqli->set_charset('gbk'); 
      if(!$mysqli) 
       throw new Exception('DB connnect faild:'.mysqli_connect_errno().mysqli_connect_error()); 
     } 
     //mysqli_free_result($result); 
     $result->close(); 
     unset($result); 
     $start += $step; 
     $sql = "SELECT id,filepath,ids,duplicatefile,filesize FROM duplicate_attachment WHERE id> $start AND duplicatefile IS NOT NULL LIMIT $step"; 
     $result = $mysqli->query($sql); 
    } 
    echo "Dup File Total Size: $totalSize\n"; 
    echo "Script cost time :".(microtime(true)-$startTime)." ms\n";sleep(1000*10); 
    mysqli_close($mysqli); 
    exit(); 

Answer 1

我啓用了XDebug extension.Sorry了點。

我禁用了這個擴展，一切順利。