apache server slow with images issue?

mutsu · 08-07-2006, 12:35 PM

hi,

just curious about my apache webserver.
my setup is on slack10.
apache is configured for virtualhosting of 2 sites:

1)a registered domain name from yahoo but redirected to zoneedit to handle the dynamic ip from isp so i can host it on my linuxbox.

2)a domain name from dyndns configured to the dynamic ip from my isp
so i can host it on my linux box.

my isp does not block port80 but the residential cable internet line has a slower upload speed compare to the download speed.

i've also optimized my images in photoshop imageready so the download is reasonable.

my question is could improper configuration of httpd.conf cause this slow response time, unreasonably slow?

thanks,
mutsu

haertig · 08-07-2006, 01:26 PM

First, make sure the delay is indeed coming from your Slackware Apache server. Load a page and then look at Apache's access_log and verify that all the REQUESTS are coming in in a timely manner. Your slowness could be because the requests are being delayed, which would have nothing to do with Apache. It can only deliver something quickly if it's ASKED quickly!

e.g., here is a snippet from my access_log. You can see the request for the initial page immediately followed by some requests for a few GIF's. Notice all the timestamps from the logfile are identical (meaning there was no delay in the REQUEST end of things).

Code:

127.0.0.1 - - [07/Aug/2006:12:18:27 -0600] "GET / HTTP/1.1" 200 4743
127.0.0.1 - - [07/Aug/2006:12:18:27 -0600] "GET /gifs/bkg-green.gif HTTP/1.1" 200 740
127.0.0.1 - - [07/Aug/2006:12:18:27 -0600] "GET /gifs/bb.gif HTTP/1.1" 200 1122
127.0.0.1 - - [07/Aug/2006:12:18:27 -0600] "GET /gifs/bbnav1.gif HTTP/1.1" 200 535
127.0.0.1 - - [07/Aug/2006:12:18:27 -0600] "GET /gifs/bbnav2.gif HTTP/1.1" 200 458
127.0.0.1 - - [07/Aug/2006:12:18:27 -0600] "GET /gifs/bbnav4.gif HTTP/1.1" 200 295
127.0.0.1 - - [07/Aug/2006:12:18:27 -0600] "GET /gifs/bbnav3.gif HTTP/1.1" 200 522
127.0.0.1 - - [07/Aug/2006:12:18:27 -0600] "GET /gifs/green.gif HTTP/1.1" 200 138
...

mutsu · 08-14-2006, 12:38 AM

haertig,

i just checked the log files and the time stamp showed large time difference between each sucessive file loads?

there are delays between request so it not caused by apache but something else?

if it's my isp, i see why they don't bother to block port80 cause it dirt slow on a residential line....

thanks
mutsu

haertig · 08-15-2006, 04:36 PM

Sorry, I lost track of this thread and didn't see your response from two days ago until just now.

If the requests are coming in to you delayed, it's not your webserver that's at fault. It could be your ISP, or it could be the connecting person's ISP, or it could be the connecting person's local computer, or it could be general network problems somewhere out there in the Internet. Who knows.

Your Apache installation can only serve up webpages as fast as it is asked for them. The only scenerio I can imagine whereby your Apache might be part of the problem is if your poor webserver machine is so loaded down that it can't even get around to logging the incoming requests in a timely manner. But I think you'd know if that was happening. You'd probably be typing things on your keyboard and noticing several seconds of delay before they were echoed to your screen. It would be dreadfully obvious that something really bad was going on with your machine.