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我有一个大型 php 脚本，它使用 curl 和 multi-curl 对我自己的服务器和其他服务器的请求。除此之外，它在我自己的服务器上执行许多数据库请求和其他操作。

脚本太大，无法放在这里，不会让事情变得更容易。

我测量了整个剧本的时间。我区分了自己服务器上的操作和外部服务器上的操作所需的时间。

看来，将我自己服务器上所有操作的经过时间加起来不会超过 0.5 秒。因此，我希望我自己的脚本对我的服务器来说不会很重。总经过时间平均为 25 秒。

大多数时间：24.5 秒我的服务器正在等待来自外部服务器的响应。我的服务器确实发出了大约 300 个 curl 请求，但是 curl 请求本身并不重。

问题： 当我运行脚本时，cpu 达到 95%，只要这个脚本正在运行，服务器（几乎）就不会响应其他请求。

这是一个多卷曲请求的示例：

<?PHP
// Multi curl:
$imax=20;
// build the individual requests as above, but do not execute them
for ($i=1; $i<$imax; $i ++ ):
${'ch_'.$i} = curl_init('http://www.domain.com/');
//$ch_2 = curl_init('http://www.domain.com/');
curl_setopt(${'ch_'.$i}, CURLOPT_RETURNTRANSFER, true);
//curl_setopt($ch_2, CURLOPT_RETURNTRANSFER, true);
endfor;

// build the multi-curl handle, adding both $ch
$mh = curl_multi_init();
for ($i=1; $i<$imax; $i ++ ):
curl_multi_add_handle($mh, ${'ch_'.$i});
endfor;

// execute all queries simultaneously, and continue when all are complete
$running = null;
do {
curl_multi_exec($mh, $running);
} while ($running);

// all of our requests are done, we can now access the results
for ($i=1; $i<$imax; $i ++ ):
${'response_'.$i} = curl_multi_getcontent(${'ch_'.$i});
endfor;
//$response_2 = curl_multi_getcontent($ch_2);

for ($i=1; $i<$imax; $i ++ ):
echo "${'response_'.$i}"; // same output as first example
endfor
?>

httpd.conf：

#
# This is the main Apache HTTP server configuration file.  It contains the
# configuration directives that give the server its instructions.
# See <URL:http://httpd.apache.org/docs/2.2> for detailed information.
# In particular, see 
# <URL:http://httpd.apache.org/docs/2.2/mod/directives.html>
# for a discussion of each configuration directive.
#
# Do NOT simply read the instructions in here without understanding
# what they do.  They're here only as hints or reminders.  If you are unsure
# consult the online docs. You have been warned.  

ServerRoot "/etc/httpd"
Listen 80

#LoadModule dummy_module /usr/lib/apache/mod_dummy.so
#LoadModule php5_module        /usr/lib/apache/libphp5.so
Include /etc/httpd/conf/extra/httpd-phpmodules.conf

User apache
Group apache

KeepAlive On
KeepAliveTimeout 10

ServerAdmin admin@localhost
DocumentRoot "/var/www/html"

MaxClients 10000
MaxRequestsPerChild 50000

<Directory /home/*>
    AllowOverride All
    Options -MultiViews -Indexes FollowSymlinks IncludesNoExec +Includes
<Limit GET POST OPTIONS PROPFIND>
    Order allow,deny
    Allow from all
</Limit>
<LimitExcept GET POST OPTIONS PROPFIND>
    Order deny,allow
    Deny from all
</LimitExcept>
</Directory>

<Directory />
    Options All
    AllowOverride All
</Directory>

<Directory "/var/www/html">
    Options Indexes FollowSymLinks
    AllowOverride All
    Order allow,deny
    Allow from all
   <IfModule mod_suphp.c>
        suPHP_Engine On
        suPHP_UserGroup webapps webapps
    SetEnv PHP_INI_SCAN_DIR
   </IfModule>
</Directory>

<IfModule mod_dir.c>
    DirectoryIndex index.html index.htm index.shtml index.php index.php5 index.php4 index.php3 index.phtml index.cgi
</IfModule>

<FilesMatch "^\.ht">
    Order allow,deny
    Deny from all
    Satisfy All
</FilesMatch>

ErrorLog /var/log/httpd/error_log
LogLevel warn

#replace %b with %O for more accurate logging
<IfModule mod_logio.c>
    LogFormat "%h %l %u %t \"%r\" %>s %O \"%{Referer}i\" \"%{User-Agent}i\"" combined
    LogFormat "%h %l %u %t \"%r\" %>s %O" common
    LogFormat "%O %I" bytes
    LogFormat "%h %l %u %t \"%r\" %>s %b \"%{Referer}i\" \"%{User-Agent}i\" %I %O" combinedio
</IfModule>

    CustomLog /var/log/httpd/access_log common

<IfModule mod_alias.c>
    # Include some DirectAdmin alias
    Include conf/extra/httpd-alias.conf
</IfModule>

<Directory "/var/www/cgi-bin">
    AllowOverride None
    Options None
    Order allow,deny
    Allow from all
</Directory>

DefaultType text/plain

<IfModule mod_mime.c>
    TypesConfig conf/mime.types
    AddType application/x-gzip .tgz
    AddEncoding x-compress .Z
    AddEncoding x-gzip .gz .tgz
    AddType application/x-compress .Z
    AddType application/x-gzip .gz .tgz
    AddHandler cgi-script .cgi
    AddHandler type-map var
    AddType text/html .shtml
    AddOutputFilter INCLUDES .shtml
    AddType video/x-ms-asf .avi
    AddType video/mpeg .mpg
    AddType video/mpeg .mpeg
    AddType video/quicktime .mov
    AddType video/x-ms-wmv .wmv
</IfModule>

#EnableMMAP off
#EnableSendfile off

#######################################################################################
# Do not change anything in included files, because they are rewritten by DirectAdmin #
#######################################################################################

# This is needed for PHP
Include conf/extra/httpd-php-handlers.conf

# Server-pool management (MPM specific)
Include conf/extra/httpd-mpm.conf

# Multi-language error messages
Include conf/extra/httpd-multilang-errordoc.conf

# Fancy directory listings
Include conf/extra/httpd-autoindex.conf

# Language settings
Include conf/extra/httpd-languages.conf

# User home directories
#Include conf/extra/httpd-userdir.conf

# Real-time info on requests and configuration
Include conf/extra/httpd-info.conf

# Virtual hosts
Include conf/extra/httpd-vhosts.conf

# Local access to the Apache HTTP Server Manual
#Include conf/extra/httpd-manual.conf

# Distributed authoring and versioning (WebDAV)
Include conf/extra/httpd-dav.conf

# Various default settings
Include conf/extra/httpd-default.conf

# Secure (SSL/TLS) connections
Include conf/extra/httpd-ssl.conf

# Deflate module settings
Include conf/extra/httpd-deflate.conf

# All the DirectAdmin vhosts
Include conf/extra/directadmin-vhosts.conf

# All suPHP directives
Include conf/extra/httpd-suphp.conf

# For user configurations not maintained by DirectAdmin. Empty by default.
Include conf/extra/httpd-includes.conf

#######################################################################################
# End of included files that are rewritten by DirectAdmin                             #
#######################################################################################

<IfModule mod_ssl.c>
SSLRandomSeed startup builtin
SSLRandomSeed connect builtin
</IfModule>

我的问题： 如何更好地配置我的服务器以防止过载？

4

1 回答 1

0

只是一个猜测：curl-multi-exec 返回一个您可以（并且应该）在 while 块中检查的值

do {
    $mrc = curl_multi_exec($mh, $active);
} while ($active && $mrc == CURLM_CALL_MULTI_PERFORM);

如 PHP 文档中所述

于 2012-05-09T21:30:30.667 回答