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自分のサーバーと他のサーバーへの curl と multi-curl リクエストの両方を使用する大きな php スクリプトがあります。それに加えて、自分のサーバーで多くのデータベース要求やその他の操作を行います。

スクリプトは大きすぎてここに置くことができません。

スクリプト全体で時間を測定しました。自社サーバーでの運用と外部サーバーでの運用にかかる時間を区別しました。

自分のサーバーでのすべての操作の経過時間を合計すると、0.5 秒以上かかることはないようです。したがって、自分のスクリプトはサーバーにとって重くないと思います。合計経過時間は平均 25 秒です。

ほとんどの場合: サーバーが外部サーバーからの応答を待っている時間は 24.5 秒です。私のサーバーは約 300 の curl リクエストを作成しますが、curl リクエスト自体はそれほど重くありません。

問題: スクリプトを実行すると、CPU が 95% になり、このスクリプトが実行されている限り、サーバーは (ほとんど) 他の要求に応答しません。

これは、マルチカール リクエストの例です。

<?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>

私の質問: 過負荷を防ぐためにサーバーをより適切に構成するにはどうすればよいですか?

4

1 に答える 1

0

ちょっとした推測: curl-multi-exec は、while ブロックでチェックできる (チェックすべき) 値を返します。

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

PHPのドキュメントに記載されているように

于 2012-05-09T21:30:30.667 に答える