PHP CLI多后台进程限制

服务器信息：

• CentOS 6.5
• 12GB内存
• 英特尔（R）至强（R）CPU E5-2430@6 CPU x 2.20GHz
• PHP CLI 5.5.7

我目前正在尝试使用Perl并行启动1000个PHP CLI进程。但是，对于等效的Perl脚本，这需要9.9秒，而不是2.3秒。当我使用Perl脚本测试时，所有1000个进程都是并行启动的（

ps-eLf | grep-ic'test.pl'

）。当我使用

/opt/testphp.php

，使用

ps-eLf | grep-ic'testphp.php'

进行测试时，我看到计数为250，然后上升到580，然后下降到0（脚本执行1000次，只是不是并行执行）

• 是否存在阻止并行启动大量PHP CLI进程的限制
• 有没有人经历过这个问题

如果我遗漏了任何有助于确定问题的内容，请告知我

谢谢

Perl启动程序脚本：

use Time::HiRes qw/ time sleep /;

my $command = '';
my $start = time;
my $filename = '/tmp/report.txt';

# open(my $fh, '>', $filename) or die "Could not open file '$filename' $!";

for $i(1 .. 1000) {
    # $command = $command . "(perl /opt/test.pl &);"; // takes 2.3 seconds
    $command = $command . "(php -q /opt/testphp.php &);"; // takes 9.9 seconds
}

system($command);

my $end = time;

print 'Total time taken: ', ( $end - $start ) , "\n";

sleep(5);

$time = microtime(true);

file_put_contents('/tmp/report_20140804_php.log', "This is the record: $time\n", FILE_APPEND);

#! /usr/bin/perl

use Time::HiRes qw/ time sleep /;

sleep(5);

my $command = '';
my $start = time;
my $filename = '/tmp/report_20140804.log';

open(my $fh, '>>', $filename) or die "Could not open file '$filename' $!";

print $fh "Successfully saved entry $start\n";

close $fh;

PHP文件（testphp.PHP）：

use Time::HiRes qw/ time sleep /;

my $command = '';
my $start = time;
my $filename = '/tmp/report.txt';

# open(my $fh, '>', $filename) or die "Could not open file '$filename' $!";

for $i(1 .. 1000) {
    # $command = $command . "(perl /opt/test.pl &);"; // takes 2.3 seconds
    $command = $command . "(php -q /opt/testphp.php &);"; // takes 9.9 seconds
}

system($command);

my $end = time;

print 'Total time taken: ', ( $end - $start ) , "\n";

sleep(5);

$time = microtime(true);

file_put_contents('/tmp/report_20140804_php.log', "This is the record: $time\n", FILE_APPEND);

#! /usr/bin/perl

use Time::HiRes qw/ time sleep /;

sleep(5);

my $command = '';
my $start = time;
my $filename = '/tmp/report_20140804.log';

open(my $fh, '>>', $filename) or die "Could not open file '$filename' $!";

print $fh "Successfully saved entry $start\n";

close $fh;

Perl文件（test.pl）：

use Time::HiRes qw/ time sleep /;

my $command = '';
my $start = time;
my $filename = '/tmp/report.txt';

# open(my $fh, '>', $filename) or die "Could not open file '$filename' $!";

for $i(1 .. 1000) {
    # $command = $command . "(perl /opt/test.pl &);"; // takes 2.3 seconds
    $command = $command . "(php -q /opt/testphp.php &);"; // takes 9.9 seconds
}

system($command);

my $end = time;

print 'Total time taken: ', ( $end - $start ) , "\n";

sleep(5);

$time = microtime(true);

file_put_contents('/tmp/report_20140804_php.log', "This is the record: $time\n", FILE_APPEND);

#! /usr/bin/perl

use Time::HiRes qw/ time sleep /;

sleep(5);

my $command = '';
my $start = time;
my $filename = '/tmp/report_20140804.log';

open(my $fh, '>>', $filename) or die "Could not open file '$filename' $!";

print $fh "Successfully saved entry $start\n";

close $fh;