The following script:
<?php
$url_array = array( 'http://www.imakenews.com/progresspsdn/e_rss.aspx',
'http://rssnewsapps.ziffdavis.com/eweekdeveloper.xml',
'http://itpapers.zdnet.com/xml/RSS-239.xml',
'http://rssnewsapps.ziffdavis.com/eweeklinux.xml' );
foreach( $url_array as $url ) {
$rdf = parse_url($url);
$timestart = microtime();
$h = gethostbyname($rdf['host']);
$timeend = microtime();
$diff = number_format(((substr($timeend,0,9)) + (substr($timeend,-10))
- (substr($timestart,0,9)) - (substr($timestart,-10))),4);
echo "gethostbyname(".$rdf['host'].") took $diff s and resolved to
$h<br>\n";
}
?>
takes less than 1 second on CLI:
# php gethostbyname.php
Content-type: text/html
X-Powered-By: PHP/4.3.2
gethostbyname(www.imakenews.com) took 0.0010 s and resolved to
208.254.39.65<br>
gethostbyname(rssnewsapps.ziffdavis.com) took 0.0005 s and resolved to
63.87.252.162<br>
gethostbyname(itpapers.zdnet.com) took 0.1922 s and resolved to
216.239.113.159<br>
gethostbyname(rssnewsapps.ziffdavis.com) took 0.0005 s and resolved to
63.87.252.162<br>
but takes 20 seconds under Apache 2.0.46:
gethostbyname(www.imakenews.com) took 5.0071 s and resolved to 208.254.39.65
gethostbyname(rssnewsapps.ziffdavis.com) took 5.0099 s and resolved to
63.87.252.162
gethostbyname(itpapers.zdnet.com) took 5.0097 s and resolved to
216.239.113.159
gethostbyname(rssnewsapps.ziffdavis.com) took 5.0099 s and resolved to
63.87.252.162
The DNS server timeout was set to 5 seconds, but we changed it to 10,
and it had no effect on either. My efforts to Google this has not lead
me in very helpful directions thus far, since gethostbyname() is not
actually failing - it just takes 5 seconds to return.
Even just a hint of where I might start looking will be much appreciated.
Thanks,
kgt
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