On 2/20/07, Srikanth S <srikanth.srinivasamurthy@xxxxxxxxxxxxxx> wrote:
Hi, When we run the command ps -ef|grep httpd|wc -l it will give how many HTTPD processes are running in that machine. Our web server starts with minimum 1 HTTPD processes only. We have got HARD LIMIT set to 512 and often when such below mentioned requests comes to web server, web server HTTPD processes will reach 512 very quickly and block the further requests. As these requests are not getting forwarded to application layer and not creating any page views, don't you think that we should stop such requests Or there are any way to find out why HTTPD processes are incrasing so much and how to avoid web server creating bottleneck for such requests
You need to start by figuring out where these requests are coming from. Is this a denial-of-service attack? Is it a broken client someplace streaming garbage at your server? Is it something else? The fact that simple requests like this are associated with your server reaching its MaxClients setting is rather suspicious. You should use mod_status's server-status handler to track down what exactly is going on on your server at these times. If you can define what exactly you mean by "invalid request" (ie, what are the exact characteristics of the request that make it invalid to you) then you can probably deny them at the server. But this may or may not help with your load problem, depending on what exactly is generating this stuff. Joshua. --------------------------------------------------------------------- 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 " from the digest: users-digest-unsubscribe@xxxxxxxxxxxxxxxx For additional commands, e-mail: users-help@xxxxxxxxxxxxxxxx
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