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Bug #7747 after opening a socket and while reading from it php start growing CPU/MEM usag
Submitted: 2000-11-10 10:42 UTC Modified: 2001-11-10 08:42 UTC
From: pov at club-internet dot fr Assigned:
Status: Closed Package: Performance problem
PHP Version: 4.0.3pl1 OS: FreeBSD 4.0-RELEASE Apache 1.3.1
Private report: No CVE-ID: None
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From: pov at club-internet dot fr
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 [2000-11-10 10:42 UTC] pov at club-internet dot fr
I use a small script grabbed from fopen to get a ftp file since fopen is buggy when dealing with ftp:// urls with encoded path name (ie using abc%20def for example).

		$datei = fsockopen("localhost", 3128, &$errno, &$errstr);
		if( !$datei )
		{
			echo "proxy not available !";
			fclose($resultfile);
			exit();
		}
		else
		{
			fputs($datei,"GET $url HTTP/1.0\n\n");
			set_time_limit(0);
			fpassthru($datei);
		}

The result is that as fpassthru sends the info from socket the mem usage grows dangerously and so does the CPU usage (up to 75% of CPU on a P100 after sending 4 Megs). Doing a "while" with a "print fgets" is even worth (but that sounds logical at least). Another "interesting" behavior of this, is that when I don't add a set_time_limit, the httpd child which delivers the info is killed with a signal 11 after 2-3 minutes and 40-45 sec. of CPU time, even though my default time-limit is 30sec.

That's all I see for now.

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 [2001-10-20 21:48 UTC] sniper@php.net
Does this happen with PHP 4.0.6 ?

 [2001-11-10 08:42 UTC] sander@php.net
No feedback. Closing.
 
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