XML解析速度变慢

时间：2013-05-10 09:00:04

标签： xml-parsing php-5.3 centos6 apache2.2 mysql-5.1

我正在尝试通过xml文件中的产品代码（也来自数据库表）读取价格表和库存清单，并将结果放入MySQL表中。

除了xml文件的响应或读取时间外，一切正常。 PHP脚本，数据库和XML文件位于同一服务器上。看了一下Apache access.log后，我看到PHP脚本启动后可以非常快速地读取（或响应）。但过了一段时间，它每分钟只读取1个：

[...]
1.2.3.4 - - [09/May/2013:13:11:21 +0300] "GET /feeds/stock.xml HTTP/1.0" 200 16202 "-" "-"
1.2.3.4 - - [09/May/2013:13:11:21 +0300] "GET /feeds/price.xml HTTP/1.0" 200 82143 "-" "-"
1.2.3.4 - - [09/May/2013:13:11:21 +0300] "GET /feeds/stock.xml HTTP/1.0" 200 16202 "-" "-"
1.2.3.4 - - [09/May/2013:13:11:21 +0300] "GET /feeds/price.xml HTTP/1.0" 200 82143 "-" "-"
1.2.3.4 - - [09/May/2013:13:11:21 +0300] "GET /feeds/stock.xml HTTP/1.0" 200 16202 "-" "-"
1.2.3.4 - - [09/May/2013:13:11:21 +0300] "GET /feeds/price.xml HTTP/1.0" 200 82143 "-" "-"
1.2.3.4 - - [09/May/2013:13:11:21 +0300] "GET /feeds/stock.xml HTTP/1.0" 200 16202 "-" "-"
1.2.3.4 - - [09/May/2013:13:11:21 +0300] "GET /feeds/price.xml HTTP/1.0" 200 82143 "-" "-"
1.2.3.4 - - [09/May/2013:13:11:21 +0300] "GET /feeds/stock.xml HTTP/1.0" 200 16202 "-" "-"
1.2.3.4 - - [09/May/2013:13:11:21 +0300] "GET /feeds/price.xml HTTP/1.0" 200 82143 "-" "-"
1.2.3.4 - - [09/May/2013:13:11:21 +0300] "GET /feeds/stock.xml HTTP/1.0" 200 16202 "-" "-"
1.2.3.4 - - [09/May/2013:13:11:21 +0300] "GET /feeds/price.xml HTTP/1.0" 200 82143 "-" "-"
1.2.3.4 - - [09/May/2013:13:11:21 +0300] "GET /feeds/stock.xml HTTP/1.0" 200 16202 "-" "-"
1.2.3.4 - - [09/May/2013:13:11:21 +0300] "GET /feeds/price.xml HTTP/1.0" 200 82143 "-" "-"
1.2.3.4 - - [09/May/2013:13:11:21 +0300] "GET /feeds/stock.xml HTTP/1.0" 200 16202 "-" "-"
1.2.3.4 - - [09/May/2013:13:11:21 +0300] "GET /feeds/price.xml HTTP/1.0" 200 82143 "-" "-"
1.2.3.4 - - [09/May/2013:13:11:21 +0300] "GET /feeds/stock.xml HTTP/1.0" 200 16202 "-" "-"
1.2.3.4 - - [09/May/2013:13:11:21 +0300] "GET /feeds/price.xml HTTP/1.0" 200 82143 "-" "-"
1.2.3.4 - - [09/May/2013:13:11:21 +0300] "GET /feeds/stock.xml HTTP/1.0" 200 16202 "-" "-"
1.2.3.4 - - [09/May/2013:13:11:21 +0300] "GET /feeds/price.xml HTTP/1.0" 200 82143 "-" "-"
1.2.3.4 - - [09/May/2013:13:11:21 +0300] "GET /feeds/stock.xml HTTP/1.0" 200 16202 "-" "-"
1.2.3.4 - - [09/May/2013:13:11:21 +0300] "GET /feeds/price.xml HTTP/1.0" 200 82143 "-" "-"
1.2.3.4 - - [09/May/2013:13:11:21 +0300] "GET /feeds/stock.xml HTTP/1.0" 200 16202 "-" "-"
1.2.3.4 - - [09/May/2013:13:11:21 +0300] "GET /feeds/price.xml HTTP/1.0" 200 82143 "-" "-"
1.2.3.4 - - [09/May/2013:13:11:21 +0300] "GET /feeds/stock.xml HTTP/1.0" 200 16202 "-" "-"
1.2.3.4 - - [09/May/2013:13:11:21 +0300] "GET /feeds/price.xml HTTP/1.0" 200 82143 "-" "-"
1.2.3.4 - - [09/May/2013:13:11:21 +0300] "GET /feeds/stock.xml HTTP/1.0" 200 16202 "-" "-"
1.2.3.4 - - [09/May/2013:13:11:21 +0300] "GET /feeds/price.xml HTTP/1.0" 200 82143 "-" "-"
1.2.3.4 - - [09/May/2013:13:11:21 +0300] "GET /feeds/stock.xml HTTP/1.0" 200 16202 "-" "-"
1.2.3.4 - - [09/May/2013:13:11:21 +0300] "GET /feeds/price.xml HTTP/1.0" 200 82143 "-" "-"
1.2.3.4 - - [09/May/2013:13:12:22 +0300] "GET /feeds/stock.xml HTTP/1.0" 200 16202 "-" "-"
1.2.3.4 - - [09/May/2013:13:13:22 +0300] "GET /feeds/price.xml HTTP/1.0" 200 82143 "-" "-"
1.2.3.4 - - [09/May/2013:13:14:22 +0300] "GET /feeds/stock.xml HTTP/1.0" 200 16202 "-" "-"
::1 - - [09/May/2013:13:15:04 +0300] "GET / HTTP/1.1" 200 1007 "-" "Mozilla/5.0 (ISPConfig monitor)"
1.2.3.4 - - [09/May/2013:13:15:22 +0300] "GET /feeds/price.xml HTTP/1.0" 200 82143 "-" "-"
1.2.3.4 - - [09/May/2013:13:16:22 +0300] "GET /feeds/stock.xml HTTP/1.0" 200 16202 "-" "-"
1.2.3.4 - - [09/May/2013:13:17:22 +0300] "GET /feeds/price.xml HTTP/1.0" 200 82143 "-" "-"
1.2.3.4 - - [09/May/2013:13:18:22 +0300] "GET /feeds/stock.xml HTTP/1.0" 200 16202 "-" "-"
1.2.3.4 - - [09/May/2013:13:19:22 +0300] "GET /feeds/price.xml HTTP/1.0" 200 82143 "-" "-"
::1 - - [09/May/2013:13:20:03 +0300] "GET / HTTP/1.1" 200 1007 "-" "Mozilla/5.0 (ISPConfig monitor)"
1.2.3.4 - - [09/May/2013:13:20:22 +0300] "GET /feeds/stock.xml HTTP/1.0" 200 16202 "-" "-"
1.2.3.4 - - [09/May/2013:13:21:22 +0300] "GET /feeds/price.xml HTTP/1.0" 200 82143 "-" "-"
1.2.3.4 - - [09/May/2013:13:22:22 +0300] "GET /feeds/stock.xml HTTP/1.0" 200 16202 "-" "-"
1.2.3.4 - - [09/May/2013:13:23:22 +0300] "GET /feeds/price.xml HTTP/1.0" 200 82143 "-" "-"
1.2.3.4 - - [09/May/2013:13:24:22 +0300] "GET /feeds/stock.xml HTTP/1.0" 200 16202 "-" "-"
::1 - - [09/May/2013:13:25:03 +0300] "GET / HTTP/1.1" 200 1007 "-" "Mozilla/5.0 (ISPConfig monitor)"
1.2.3.4 - - [09/May/2013:13:25:23 +0300] "GET /feeds/price.xml HTTP/1.0" 200 82143 "-" "-"
1.2.3.4 - - [09/May/2013:13:26:23 +0300] "GET /feeds/stock.xml HTTP/1.0" 200 16202 "-" "-"
1.2.3.4 - - [09/May/2013:13:27:23 +0300] "GET /feeds/price.xml HTTP/1.0" 200 82143 "-" "-"
1.2.3.4 - - [09/May/2013:13:28:23 +0300] "GET /feeds/stock.xml HTTP/1.0" 200 16202 "-" "-"
1.2.3.4 - - [09/May/2013:13:29:23 +0300] "GET /feeds/price.xml HTTP/1.0" 200 82143 "-" "-"
::1 - - [09/May/2013:13:30:04 +0300] "GET / HTTP/1.1" 200 1007 "-" "Mozilla/5.0 (ISPConfig monitor)"
1.2.3.4 - - [09/May/2013:13:30:23 +0300] "GET /feeds/stock.xml HTTP/1.0" 200 16202 "-" "-"
1.2.3.4 - - [09/May/2013:13:31:23 +0300] "GET /feeds/price.xml HTTP/1.0" 200 82143 "-" "-"
1.2.3.4 - - [09/May/2013:13:32:23 +0300] "GET /feeds/stock.xml HTTP/1.0" 200 16202 "-" "-"
1.2.3.4 - - [09/May/2013:13:33:23 +0300] "GET /feeds/price.xml HTTP/1.0" 200 82143 "-" "-"
1.2.3.4 - - [09/May/2013:13:34:23 +0300] "GET /feeds/stock.xml HTTP/1.0" 200 16202 "-" "-"
::1 - - [09/May/2013:13:35:03 +0300] "GET / HTTP/1.1" 200 1007 "-" "Mozilla/5.0 (ISPConfig monitor)"
1.2.3.4 - - [09/May/2013:13:35:23 +0300] "GET /feeds/price.xml HTTP/1.0" 200 82143 "-" "-"
1.2.3.4 - - [09/May/2013:13:36:23 +0300] "GET /feeds/stock.xml HTTP/1.0" 200 16202 "-" "-"
1.2.3.4 - - [09/May/2013:13:37:23 +0300] "GET /feeds/price.xml HTTP/1.0" 200 82143 "-" "-"
1.2.3.4 - - [09/May/2013:13:38:23 +0300] "GET /feeds/stock.xml HTTP/1.0" 200 16202 "-" "-"
1.2.3.4 - - [09/May/2013:13:39:24 +0300] "GET /feeds/price.xml HTTP/1.0" 200 82143 "-" "-"
::1 - - [09/May/2013:13:40:03 +0300] "GET / HTTP/1.1" 200 1007 "-" "Mozilla/5.0 (ISPConfig monitor)"
1.2.3.4 - - [09/May/2013:13:40:24 +0300] "GET /feeds/stock.xml HTTP/1.0" 200 16202 "-" "-"
[...]

从xml文件中读取价格的功能：

function get_price($product_id, $source='xml'){
    $price      = NULL;
    $url = "http://www.mydomain.com/feeds/price.xml";

    $xml = simplexml_load_file($url);
    $Price = $xml->xpath("//PRODUCT[@CODE='". $product_id ."']");

    return $price;
}

读取股票xml的功能非常相似。

所有配置（MySQL，PHP，Apache）几乎都是默认配置，没什么特别的。我不知道为什么读取率会在一段时间后下降:(

服务器规格：

  • CentOS版本6.4（最终版）
  • ISPConfig 3.0.5.2
  • Apache / 2.2.15（Unix）
  • MySQL 5.1.69
  • PHP 5.3.3

1 个答案:

答案 0 :(得分：1)

不要使用http来获取文件，只需直接调用文件

使用此代码

$ url =“feeds / price.xml”;

您还可以使用此代码获取Feed目录中的所有文件，并获得$ Price变量

中的所有结果 
 $Price = "";
 foreach (glob("feeds/*.xml") as $filename) { //Getting all xml files from feeds direcotry
       $xml = simplexml_load_file("feeds/".$filename);
       $Price .= $xml->xpath("//PRODUCT[@CODE='". $product_id ."']");
  }
  print_r($Price);
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