我使用yii模块备份sql数据库，我注意到这样的错误： 致命错误：内存不足（分配295436288）（试图分配225446869字节）
我正在浏览和上面的错误，因为我的数据库太大了。我可以在这做什么解决方案？我读了一些文章，我可以使用flush（）函数来减少内存使用量。
<?php
/**
* Backup
*
* Yii module to backup, restore databse
*
* @version 1.0
* @author Shiv Charan Panjeta <shiv@toxsl.com> <shivcharan.panjeta@outlook.com>
*/
class DefaultController extends Controller
{
/**
* @var string the default layout for the views. Defaults to '//layouts/column2', meaning
* using two-column layout. See 'protected/views/layouts/column2.php'.
*/
public $layout='//layouts/column2';
/**
* @return array action filters
*/
public function filters()
{
return array(
'accessControl', // perform access control for CRUD operations
);
}
/**
* Specifies the access control rules.
* This method is used by the 'accessControl' filter.
* @return array access control rules
*/
public function accessRules()
{
return array(
array('allow', // allow all users to perform 'index' and 'view' actions
'actions'=>array('create1'),
'users'=>array('*'),
),
array('allow', // allow authenticated user to perform 'create' and 'update' actions
'actions'=>array(),
'users'=>array('@'),
),
array('allow', // allow admin user to perform 'admin' and 'delete' actions
'actions'=>array('admin','delete','clean','index','view','create','upload', 'download','restore'),
'users'=>array('admin'),
),
array('deny', // deny all users
'users'=>array('*'),
),
);
}
public $tables = array();
public $fp ;
public $file_name;
public $_path = null;
public $back_temp_file = 'db_backup_';
protected function getPath()
{
if ( isset ($this->module->path )) $this->_path = $this->module->path;
else $this->_path = Yii::app()->basePath .'/../_backup/';
if ( !file_exists($this->_path ))
{
mkdir($this->_path );
chmod($this->_path, '777');
}
return $this->_path;
}
public function execSqlFile($sqlFile)
{
$message = "ok";
if ( file_exists($sqlFile))
{
$sqlArray = file_get_contents($sqlFile);
$cmd = Yii::app()->db->createCommand($sqlArray);
try {
$cmd->execute();
}
catch(CDbException $e)
{
$message = $e->getMessage();
}
}
return $message;
}
public function getColumns($tableName)
{
$sql = 'SHOW CREATE TABLE '.$tableName;
$cmd = Yii::app()->db->createCommand($sql);
$table = $cmd->queryRow();
$create_query = $table['Create Table'] . ';';
$create_query = preg_replace('/^CREATE TABLE/', 'CREATE TABLE IF NOT EXISTS', $create_query);
//$create_query = preg_replace('/AUTO_INCREMENT\s*=\s*([0-9])+/', '', $create_query);
if ( $this->fp)
{
$this->writeComment('TABLE `'. addslashes ($tableName) .'`');
$final = 'DROP TABLE IF EXISTS `' .addslashes($tableName) . '`;'.PHP_EOL. $create_query .PHP_EOL.PHP_EOL;
fwrite ( $this->fp, $final );
}
else
{
$this->tables[$tableName]['create'] = $create_query;
return $create_query;
}
}
public function getData($tableName)
{
$sql = 'SELECT * FROM '.$tableName;
$cmd = Yii::app()->db->createCommand($sql);
$dataReader = $cmd->query();
$data_string = '';
foreach($dataReader as $data)
{
$itemNames = array_keys($data);
$itemNames = array_map("addslashes", $itemNames);
$items = join('`,`', $itemNames);
$itemValues = array_values($data);
$itemValues = array_map("addslashes", $itemValues);
$valueString = join("','", $itemValues);
$valueString = "('" . $valueString . "'),";
$values ="\n" . $valueString;
if ($values != "")
{
$data_string .= "INSERT INTO `$tableName` (`$items`) VALUES" . rtrim($values, ",") . ";" . PHP_EOL;
}
}
if ( $data_string == '')
return null;
if ( $this->fp)
{
$this->writeComment('TABLE DATA '.$tableName);
$final = $data_string.PHP_EOL.PHP_EOL.PHP_EOL;
fwrite ( $this->fp, $final );
}
else
{
$this->tables[$tableName]['data'] = $data_string;
return $data_string;
}
}
public function getTables($dbName = null)
{
$sql = 'SHOW TABLES';
$cmd = Yii::app()->db->createCommand($sql);
$tables = $cmd->queryColumn();
return $tables;
}
public function StartBackup($addcheck = true)
{
$this->file_name = $this->path . $this->back_temp_file . date('Y.m.d_H.i.s') . '.sql';
$this->fp = fopen( $this->file_name, 'w+');
if ( $this->fp == null )
return false;
fwrite ( $this->fp, '-- -------------------------------------------'.PHP_EOL );
if ( $addcheck )
{
fwrite ( $this->fp, 'SET AUTOCOMMIT=0;' .PHP_EOL );
fwrite ( $this->fp, 'START TRANSACTION;' .PHP_EOL );
fwrite ( $this->fp, 'SET SQL_QUOTE_SHOW_CREATE = 1;' .PHP_EOL );
}
fwrite ( $this->fp, 'SET @OLD_UNIQUE_CHECKS=@@UNIQUE_CHECKS, UNIQUE_CHECKS=0;'.PHP_EOL );
fwrite ( $this->fp, 'SET @OLD_FOREIGN_KEY_CHECKS=@@FOREIGN_KEY_CHECKS, FOREIGN_KEY_CHECKS=0;'.PHP_EOL );
fwrite ( $this->fp, '-- -------------------------------------------'.PHP_EOL );
$this->writeComment('START BACKUP');
return true;
}
public function EndBackup($addcheck = true)
{
fwrite ( $this->fp, '-- -------------------------------------------'.PHP_EOL );
fwrite ( $this->fp, 'SET FOREIGN_KEY_CHECKS=@OLD_FOREIGN_KEY_CHECKS;'.PHP_EOL );
fwrite ( $this->fp, 'SET UNIQUE_CHECKS=@OLD_UNIQUE_CHECKS;'.PHP_EOL );
if ( $addcheck )
{
fwrite ( $this->fp, 'COMMIT;' .PHP_EOL );
}
fwrite ( $this->fp, '-- -------------------------------------------'.PHP_EOL );
$this->writeComment('END BACKUP');
fclose($this->fp);
$this->fp = null;
}
public function writeComment($string)
{
fwrite ( $this->fp, '-- -------------------------------------------'.PHP_EOL );
fwrite ( $this->fp, '-- '.$string .PHP_EOL );
fwrite ( $this->fp, '-- -------------------------------------------'.PHP_EOL );
}
public function actionCreate()
{
set_time_limit(0);
$tables = $this->getTables();
if(!$this->StartBackup())
{
//render error
$this->render('create');
return;
}
foreach($tables as $tableName)
{
$this->getColumns($tableName);
}
foreach($tables as $tableName)
{
$this->getData($tableName);
}
$this->EndBackup();
$this->redirect(array('index'));
}
public function actionClean($redirect = true)
{
$tables = $this->getTables();
if(!$this->StartBackup())
{
//render error
return;
}
foreach($tables as $tableName)
{
fwrite ( $this->fp, '-- -------------------------------------------'.PHP_EOL );
fwrite ( $this->fp, 'DROP TABLE IF EXISTS ' .addslashes($tableName) . ';'.PHP_EOL );
fwrite ( $this->fp, '-- -------------------------------------------'.PHP_EOL );
}
$this->EndBackup();
// logout so there is no problme later .
Yii::app()->user->logout();
$this->execSqlFile($this->file_name);
unlink($this->file_name);
if ( $redirect == true) $this->redirect(array('index'));
}
public function actionDelete($file = null)
{
$this->updateMenuItems();
if ( isset($file))
{
$sqlFile = $this->path . basename($file);
if ( file_exists($sqlFile))
unlink($sqlFile);
}
else throw new CHttpException(404, Yii::t('app', 'File not found'));
$this->actionIndex();
}
public function actionDownload($file = null)
{
$this->updateMenuItems();
if ( isset($file))
{
$sqlFile = $this->path . basename($file);
if ( file_exists($sqlFile))
{
$request = Yii::app()->getRequest();
$request->sendFile(basename($sqlFile),file_get_contents($sqlFile));
}
}
throw new CHttpException(404, Yii::t('app', 'File not found'));
}
public function actionIndex()
{
$this->updateMenuItems();
$path = $this->path;
$dataArray = array();
$list_files = glob($path .'*.sql');
if ($list_files )
{
$list = array_map('basename',$list_files);
sort($list);
foreach ( $list as $id=>$filename )
{
$columns = array();
$columns['id'] = $id;
$columns['name'] = basename ( $filename);
$columns['size'] = floor(filesize ( $path. $filename)/ 1024) .' KB';
$columns['create_time'] = date( DATE_RFC822, filectime($path .$filename) );
$dataArray[] = $columns;
}
}
$dataProvider = new CArrayDataProvider($dataArray);
$this->render('index', array(
'dataProvider' => $dataProvider,
));
}
public function actionSyncdown()
{
$tables = $this->getTables();
if(!$this->StartBackup())
{
//render error
$this->render('create');
return;
}
foreach($tables as $tableName)
{
$this->getColumns($tableName);
}
foreach($tables as $tableName)
{
$this->getData($tableName);
}
$this->EndBackup();
$this->actionDownload(basename($this->file_name));
}
public function actionRestore($file = null)
{
$this->updateMenuItems();
$message = 'OK. Done';
$sqlFile = $this->path . 'install.sql';
if ( isset($file))
{
$sqlFile = $this->path . basename($file);
}
$this->execSqlFile($sqlFile);
$this->render('restore',array('error'=>$message));
}
public function actionUpload()
{
$model= new UploadForm('upload');
if(isset($_POST['UploadForm']))
{
$model->attributes = $_POST['UploadForm'];
$model->upload_file = CUploadedFile::getInstance($model,'upload_file');
if($model->upload_file->saveAs($this->path . $model->upload_file))
{
// redirect to success page
$this->redirect(array('index'));
}
}
$this->render('upload',array('model'=>$model));
}
protected function updateMenuItems($model = null)
{
// create static model if model is null
if ( $model == null ) $model=new UploadForm('install');
switch( $this->action->id)
{
case 'restore':
{
$this->menu[] = array('label'=>Yii::t('app', 'View Site') , 'url'=>Yii::app()->HomeUrl);
}
case 'create':
{
$this->menu[] = array('label'=>Yii::t('app', 'List Backup') . ' ' . $model->label(2), 'url'=>array('index'));
}
break;
case 'upload':
{
$this->menu[] = array('label'=>Yii::t('app', 'Create Backup') . ' ' . $model->label(), 'url'=>array('create'));
}
break;
default:
{
$this->menu[] = array('label'=>Yii::t('app', 'List Backup') . ' ' . $model->label(2), 'url'=>array('index'));
$this->menu[] = array('label'=>Yii::t('app', 'Create Backup') . ' ' . $model->label(), 'url'=>array('create'));
//$this->menu[] = array('label'=>Yii::t('app', 'Upload Backup') . ' ' . $model->label(), 'url'=>array('upload'));
//$this->menu[] = array('label'=>Yii::t('app', 'Restore Backup') . ' ' . $model->label(), 'url'=>array('restore'));
//$this->menu[] = array('label'=>Yii::t('app', 'Clean Database') . ' ' . $model->label(), 'url'=>array('clean'));
//$this->menu[] = array('label'=>Yii::t('app', 'View Site') , 'url'=>Yii::app()->HomeUrl);
}
break;
}
}
}
答案 0 :(得分：0)
分配了295436288个字节，就像295MB。
如你所说，你把它设置为2GB。你在php.ini中做错了。也许你正在处理的代码可能有限制或选项来设置内存使用。
并且无论如何，在php.ini更改后重启服务器。
新编辑：
Do your server have enough(2GB, as you tried to set) free memory(RAM).