On Sat, Sep 20, 2008 at 10:35 AM, Matt <[EMAIL PROTECTED]> wrote: > On Sat, Sep 20, 2008 at 4:33 PM, Matt <[EMAIL PROTECTED]> wrote: > >> >> >> On Sat, Sep 20, 2008 at 3:33 PM, John McGowan <[EMAIL PROTECTED]> wrote: >> >>> I've got several apache servers that have been running for quite some >>> time. We don't normally use CGI in production, but I have a reason to use >>> it now. So, I've placed the CGI program, setup the config, and the CGI >>> works. However, every request to *any* of the executable CGI programs that >>> I have all have about a 10s delay before executing. Seems to be some sort >>> of network timeout or bad DNS going on in the background, but I just can't >>> find anything wrong with the config. >>> >>> It's not a matter of the scripts themselves being slow... a simple >>> helloworld perl script takes the same 10s as the captcha image generator >>> that need to get working. >>> >>> What's strange is that I have this problem across all of my servers... >>> some are FC3, 4, some are CentOS 5, Some are apache 2, and some are apache >>> 2.2 >>> >>> The only thing i could think of was Host Name Lookups, or some >>> misspelling in "Allow from all" I've cleared those. In fact, I sent my >>> conf files to a friend, and he got them up and running on his server, and >>> didn't have the same problem. >>> >>> Can anybody think of some reason why this 10s delay would occur when >>> hitting these simple CGI scripts? I'm pretty sure the delay is outside of >>> apache, due to the varied configurations it's happening on, but I'm stuck. >>> >>> -- >>> John >>> >>> >>> >> >> What an ace problem. I dont know the answer, but here are some questions. >> Have you used telnet over ssh while logged on locally on each servers to >> make sure its not with something common to the setups, which would mean that >> even locally it would take 10seconds. Im assuming a GET verb is used. Was >> your hello world perl script just that, or did it have a db connection are >> have part of the captcha generator code in common. >> Do you use perl elsewhere on the servers other than the cgi-bin with no >> issues. how big is your path? Have you tcpdumped the request, Im assuming >> TTFB is the problem, that would tell you what the server was doing. Are >> using a proxy, or a firewall to hide these servers? >> >> >> > > oh yeah and how did you clear the host name lookups as an issue? again > tcpdump would tell you. >
I'm not 100% sure, because I'm not an expert in using tcpdump, but I did a quick 15 second dump and reproduced the problem. I used wireshark to look at the data. I can see my 10s conversation with the webserver, but I don't see any other conversations that are around the same size that don't have an explanation. -- John McGowan Lynch2 792 West Bartlett Road Bartlett, Illinois 60103 www.lynch2.com w:847-608-6900 Ext 110
