Thanks for the reply, Sipathamandla! I know the meaning of ramp-up period and I know that I'm stressing a lot the system. I'm trying to understand why I have these delays. It seems that, when many threads come together, some of them suffer a delay that seems to be about 700 ms, then 1.5 s, 3 s and then 9 seconds.
I'm trying to understand this phenomenon :working: Max Sipathamandla wrote: > > From the manual; > http://jakarta.apache.org/jmeter/usermanual/component_reference.html#Thread_Group > the ramp up will give you server time to breath by delaying the start > of the next thread, setting it to 0 or 1 means, for zero, the server > is going to get 1000 request instantly and that will definitely impact > response time. Any increase in the ramp up time means the server is > not flooded. > > In the instance of 500 users, 0 seconds ramp up, and a delay of 3 > seconds, you have halved the requests and mathematically i would > expect it to half the response time as well. (might not always be the > case) > > ____________________________________________________________________________________________ > > > > > 2008/11/7 Massimiliano Giraldo <[EMAIL PROTECTED]>: >> >> Hi all! >> >> I'm testing (with JMeter) Apache Web Server with a cluster of two >> computers >> with JBoss (mod_jk for connection between Web Server and JBoss). >> I make requests to a simple servlet. >> I plan: >> - 1000 users; >> - 0 or 1 second of ramp-up; >> - 10 requests for each user. >> >> I see that the response times sometimes get worse, reaching steps of 1.5 >> seconds, 3 seconds and 9 seconds. >> >> If I plan 5 or 10 seconds of ramp-up, the average response time is about >> 2-3 >> ms (and it's ok!) >> If I plan 500 users and 0 seconds of ramp-up, the delay reaches 3 seconds >> (and it doesn't reach 9 seconds). >> >> I suppose that there are some settings that limit the number of active >> threads (in Jmeter, Apache or JBoss) and therefore, when there are many >> active threads, some of them will be deferred. >> >> Is it correct? >> Was anyone of you in this situation? >> Does anyone know which settings I need to modify to resolve my problem? >> >> Thanks >> >> Max >> >> ----- >> http://www.pcguide.netsons.org http://www.pcguide.netsons.org >> -- >> View this message in context: >> http://www.nabble.com/Jmeter%2C-Apache-Web-Server-and-JBoss-Cluster%3A-the-response-time-grows%21-tp20376974p20376974.html >> Sent from the JMeter - User mailing list archive at Nabble.com. >> >> >> --------------------------------------------------------------------- >> To unsubscribe, e-mail: [EMAIL PROTECTED] >> For additional commands, e-mail: [EMAIL PROTECTED] >> >> > > --------------------------------------------------------------------- > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] > > > ----- http://www.pcguide.netsons.org http://www.pcguide.netsons.org -- View this message in context: http://www.nabble.com/Jmeter%2C-Apache-Web-Server-and-JBoss-Cluster%3A-the-response-time-grows%21-tp20376974p20377763.html Sent from the JMeter - User mailing list archive at Nabble.com. --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
