> -----Original Message----- > From: Sachin123 [mailto:sachin.tandon@xxxxxxxxxxxxx] > Sent: Friday, March 30, 2007 6:55 AM > To: users@xxxxxxxxxxxxxxxx > Subject: RE: Apache CPU Utilization peaks to 100% > > > We are running Apache HTTP Server on a Windows XP machine > with 2.79GHZ and 1 > GB RAM , So that's a fairly decent desktop PC. It's not exactly an enterprise level webserver, however. > Weblogic 9.2 is running on another machine with the same > configuration as Apache HTTP Server machine and on a third > machine which is > a 2 CPU,2.79 GHZ and 4 GB RAM machine we have Oracle 10g running > > We are doing a load test with 20 concurrent users .We see the > access.log and > apache is processing g around 140 HTTP Requests ( GET + Post) > through and > forwarding to the Application Server . > > We see that Apache is peaking to 100% where as the > Application Server and > the DB Server remain underutilzed . That would imply that the webserver is the bottleneck - but what is the rate in the backend? It is also getting 140 req/sec or is it less? If less, is there a queue building up at the webserver (ie, are some clients hanging/timing out)? > > The Application is using JDK 1.5 and Spring Framework is being used . > The Application does to have complex business logic and POJO > classess are > being used in all the layer > Presentation Layer,Business Logic Layer and the DAO Layer. > > The Thread Count We see for Apache is 254 > > Why Apache peaks upto 100% ? > 1. Is it becuase 140 requests per second it processing is too high It would seem so.. BTW, it's not the *number* of requests per second, it's the resources each request demands that counts. If each request launches an intensive computation then even a low rate could swamp a server. > 2. Some Configuration settings need to be changed ? Check out http://httpd.apache.org/docs/2.0/misc/perf-tuning.html. Note especially the first note: "The single biggest hardware issue affecting webserver performance is RAM" - 1GB doesn't sound like an awful lot these days... Bear in mind that the problem is n't really the webserver - it just receives requests and translates them into tasks for the OS. If the task is simple (eg, fetch a static file) then the performance will be good. If the task is complex (look up a DB, crunch some data, request something from another server, process the result, rewrite, faff about, etc...) then don't expect too much. Rgds, Owen Boyle Disclaimer: Any disclaimer attached to this message may be ignored. > > Please suggest > > Thanks > Sachin > > > Boyle Owen wrote: > > > >> -----Original Message----- > >> From: Sachin123 [mailto:sachin.tandon@xxxxxxxxxxxxx] > >> Sent: Thursday, March 29, 2007 8:04 AM > >> To: users@xxxxxxxxxxxxxxxx > >> Subject: Apache CPU Utilization peaks to 100% > >> > >> > >> Hi > >> > >> We are doing a load test for 20 concurrent users with > >> Apache 2.00.59 on one machine > >> Weblogic 9.2 on another machine > >> Oracle 10g on the third machine > > > > - define "machine" (OS, hardware) > > - webservers don't really have "users", they handle > requests. What kind > > of requests? How frequent? What kind of back-end activity do the > > requests generate? > > > > Rgds, > > Owen Boyle > > Disclaimer: Any disclaimer attached to this message may be ignored. > > > >> > >> The machine in which Apache HTTP serveris installed peaks > >> upto 100% and > >> machines in which Weblogic 9.2 and Oracle 10g is installed > are under > >> utilized . > >> > >> Attached is the http.conf which is being used. > >> > >> Please suggest what configuration changes can be done to > improve the > >> performance > >> > >> In Apache Rewrite Engine is on to show the user the freindly > >> URL's instead > >> of the actual URL's Will rewrite take this much CPU > >> http://www.nabble.com/file/7498/httpd.conf httpd.conf > >> -- > >> View this message in context: > >> http://www.nabble.com/Apache-CPU-Utilization-peaks-to-100--tf3 > > 484568.html#a9727551 > >> Sent from the Apache HTTP Server - Users mailing list archive > >> at Nabble.com. > >> > >> > >> > --------------------------------------------------------------------- > >> 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 > >> > > > > > > This message is for the named person's use only. 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