> My web server's response time for http requests skyrockets every > weekday between about 9am and 5pm. I've gone over my munin graphs and > the only one that really correlates well with the slowdown is "TCP > Queuing". It looks like I normally have about 400 packets per second > graphed as "direct copy from queue" in munin throughout the day, but 2 > to 3.5 times that many are periodically graphed during work hours. I > don't see the same pattern at all from the graph of all traffic on my > network interface which actually peaks over the weekend. TCP Queuing > doesn't rise above 400 packets per second all weekend. This is > consistent week after week. > > My two employees come into work during the hours in question, and they > certainly make frequent requests of the web server while at work, but > if their volume of requests were the cause of the problem then that > would be reflected in the graph of web server requests but it is not. > I do run a small MTU on the systems at work due to the config of the > modem/router we have there. > > Is this a recognizable problem to anyone?
I'm in the midst of this. Are there certain attacks I should check for? - Grant
