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博客园 - myx

安装gitlab管理自己的代码 升级Tornado到4后weibo oauth登录不了 SQL Server 无日志文件附加数据库 用monit监控系统关键进程 Failed to read auto-increment value from storage engine错误的处理方法 今天测试了一下 sqlalchemy 性能 PIL The _imaging C module is not installed tcpdf慢及常用的一些方法及问题 Python获取WebService CodeIgniter出现Disallowed Key Characters的问题 CodeIgniter链接ms sql 如果数据库名称有点号连接出错 用python写windows服务 CodeIgniter链接ms sql 的过程windows 2008 关于NTLM认证的.NET,php,python登录 DotNetOpenAuth的Facebook登录,获取头像与基本资料 php里的html内容切取 js生成新加坡的NRIC号码 Sina站内应用的登录 PowerDesigner 链接MySql 用ODBC链接不上的问题
phpExcel大数据量情况下内存溢出解决
myx · 2013-05-20 · via 博客园 - myx

版本:1.7.6+

在不进行特殊设置的情况下,phpExcel将读取的单元格信息保存在内存中,我们可以通过

PHPExcel_Settings::setCacheStorageMethod()

来设置不同的缓存方式,已达到降低内存消耗的目的!

1、将单元格数据序列化后保存在内存中

PHPExcel_CachedObjectStorageFactory::cache_in_memory_serialized; 

2、将单元格序列化后再进行Gzip压缩,然后保存在内存中

PHPExcel_CachedObjectStorageFactory::cache_in_memory_gzip; 

3、缓存在临时的磁盘文件中,速度可能会慢一些

PHPExcel_CachedObjectStorageFactory::cache_to_discISAM;

4、保存在php://temp

PHPExcel_CachedObjectStorageFactory::cache_to_phpTemp; 

5、保存在memcache中

PHPExcel_CachedObjectStorageFactory::cache_to_memcache

        $cacheMethod = PHPExcel_CachedObjectStorageFactory::cache_to_memcache;  
        $cacheSettings = array( 'memcacheServer'  => 'localhost',  
                        'memcachePort'    => 11211,  
                        'cacheTime'       => 600  
                      );  
        PHPExcel_Settings::setCacheStorageMethod($cacheMethod, $cacheSettings);

注意是加在new PHPExcel() 前面:如下

1 require_once APPPATH .'third_party/PHPExcel/PHPExcel.php';
2         
3         $cacheMethod = PHPExcel_CachedObjectStorageFactory::cache_to_phpTemp;
4         $cacheSettings = array('memoryCacheSize'=>'16MB');
5         PHPExcel_Settings::setCacheStorageMethod($cacheMethod, $cacheSettings);
6         
7         $objPHPExcel = new PHPExcel();