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php 内存管理

本帖最后由 zmzkkk 于 2012-10-31 16:13:59 编辑 大家好, , 大家在做PHP 项目的时候会注意内存管理吗?  我写了一段代码,采集一个网站,CURL 采集, MYSQL 写数据比较多,我是一条一条记录写。 刚开始运行的时候采集的很快。  但过一会采集速度会慢上好多倍。第一次采集的时候,程序运行了三个小时左右出现内存溢出错误。 现在第二次采集开始,我用memory_get_usage 记录了采集过程的内存使用。内存使用一直在慢慢增加。 一直没有释放过。还有一个问题, 我用google浏览器采集的时候,发现把网页页面 关了,采集程序还是会在运行。   有没有人有这方面的经验, 指教一下小弟。 用gc_collect_cycles() 起动垃圾回收处理不知道可以不可以。 
我的php版本是5.4.4

http://www.zhangmingzun.cn/?p=144

------解决方案--------------------
是不是挂着一只无限循环采集啊?
------解决方案--------------------
每次添加完数据把不用的变量都UNSET掉,这些垃圾数据占用你的内存
------解决方案--------------------
curl采集么,循环中,curl有释放么?
------解决方案--------------------
curl_close()

------解决方案--------------------
每次循环结束的地方把不需要的全部unset,
然后和循环开始的地方的memory usage比较, 一直到基本一样

这是个慢慢调试的活

gc_collect_cycles基本无用, 因为你不显式调用垃圾收集也会进行
------解决方案--------------------
sleep 还是减缓程序的运行,与内存占用毫无关系

你最好贴出你的核心代码,以便帮你分析
------解决方案--------------------
建议你用shell来解决这个问题:
大概解决办法是exec(xx.php,$args);
这样每次exec运行完后,直接释放掉xx.php文件占用的资源

------解决方案--------------------
可以这样来做,把$list循环下所有的代码写到一个另一个php文件中,然后用shell  后台直接就可以了,
------解决方案--------------------
先把循环体内tp的几个操作,包括读取写入,注释掉,以确认不是tp的问题
------解决方案--------------------
那就用批处理吧
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