On 12/8/10 10:15 PM, Igor Cicimov wrote:
Check the dns resolution for the xyz host.
There is no problem with DNS. All of the subdomains use the wildcard *.ourdomain.com, which resolves to both www and xzy. The problem isn't with DNS. Each TCP/IP conversation starts instantly. But with xyz.ourdomain.com, every HTTP GET request ends up with a five-second delay in the middle of the TCP/IP stream. It's very consistent. Thanks, Craig
Sent from my phoneOn Dec 9, 2010 1:24 PM, "Craig A. James" <cjames@xxxxxxxxxxxxxx <mailto:cjames@xxxxxxxxxxxxxx>> wrote: We operate one public web site and about 20 private web sites. They're all the same server, running the same Apache server instance (2.2.14-5ubuntu8.3). Most customers get excellent performance, but two customers get terrible response times, but only on *some* of the VirtualHosts. They get excellent responses from our public site, but the very same page served from a private site can take over a minute to load. The VirtualHosts are configured identically except for the "Allow from" and "ServerName" directives. As far as I can tell, everything else is identical (except the specific database it uses, but for these tests we're only loading static HTML pages). It appears that "www.ourdomain.com <http://www.ourdomain.com>" VirtualHosts always work, but "xyz.ourdomain.com <http://xyz.ourdomain.com>" VirtualHosts give problems. Examining TCP/IP traffic using WireShark, it looks like the slow virtual hosts are dropping ACK packets. Each TCP/IP conversation starts out fast, but then there's a 5-second gap in the middle of every HTTP response. Yet if the very same user accesses a different VirtualHost, there is no problem at all. We've been trying to figure this out for weeks with no luck. Any ideas would be greatly appreciated. Craig --------------------------------------------------------------------- The official User-To-User support forum of the Apache HTTP Server Project. See <URL:http://httpd.apache.org/userslist.html> for more info. To unsubscribe, e-mail: users-unsubscribe@xxxxxxxxxxxxxxxx <mailto:users-unsubscribe@xxxxxxxxxxxxxxxx> " from the digest: users-digest-unsubscribe@xxxxxxxxxxxxxxxx <mailto:users-digest-unsubscribe@xxxxxxxxxxxxxxxx> For additional commands, e-mail: users-help@xxxxxxxxxxxxxxxx <mailto:users-help@xxxxxxxxxxxxxxxx>
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