Ah, this is because I have a "Setup Thread Group" using the standard Thread Group and running for 5 to 6 minutes to do some initial data setup on the system. And then the OMTG will kick in. I have not shown the threads of this Setup Thread Group in the graph, only the OMTG sequence.
Le mar. 24 sept. 2024 à 16:37, Felix Schumacher < felix.schumac...@internetallee.de> a écrit : > Why is the spike at 06:23 (seconds? minutes?). Could it be, that something > is holding back your threads and releases them all at one? > > If there is a lot of time at the beginning of the test, where seemingly > nothing happens, I would take a few thread dumps on the JMeter side and > look at those. > > Felix > Am 19.09.24 um 03:36 schrieb Robert Bourgault du Coudray: > > Hi, > I am seeing a spike of threads on start-up, which I think is abnormal. > > For instance, I have set an Open Model Thread Group with following > parameters: > > > > / * Rampup-up time over 1 min */ > > rate(0) random_arrivals(1 min) rate(30/min) > > /* Test for 30 mins */ > > random_arrivals(30 min) rate(30/min) > > > > With these settings, we are seeing a spike of threads up to 160 on > start-up before the system stabilises to a more reasonable rate afterwards > (see attachment). > > This is causing false positives on our SUT. > > > > Can you please suggest any workarounds or fixes? > > > > Thank you > > > > *Robert Bourgault du Coudray* > Senior Quality Engineer | Bankwest Technology > Level 14C Bankwest Place 300 Murray Street Perth WA 6000 > (08) 9369 9487 | 0468 770 721 > robert.bourgaultducoud...@bankwest.com.au > bankwest.com.au <http://www.bankwest.com.au/> > > *Bankwest acknowledges the Traditional Owners of the lands across > Australia as the continuing custodians of Country and Culture. We pay our > respect to First Nations peoples and their Elders, past and present. * > > > > > > > > _______________________________________________________________________________ > Unencrypted electronic mail is not secure and may not be authentic. > If you have any doubts as to the contents please telephone to confirm. > > This electronic transmission including any attachments is intended only > for those to whom it is addressed. It may contain copyright material or > information that is confidential, privileged or exempt from disclosure by > law. > Any claim to privilege is not waived or lost by reason of mistaken > transmission > of this information. If you are not the intended recipient you must not > distribute or copy this transmission and should please notify the sender. > Your costs for doing this will be reimbursed by the sender. > > We do not accept liability in connection with computer virus, data > corruption, > delay, interruption, unauthorised access or unauthorised amendment. > > _______________________________________________________________________________ > > > > This email has been scanned by the Microsoft Exchange Online Protection > cloud service. > For more information please visit Exchange Online Protection > <https://www.microsoft.com/en-au/microsoft-365/exchange/exchange-email-security-spam-protection> > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: user-unsubscr...@jmeter.apache.org > For additional commands, e-mail: user-h...@jmeter.apache.org > >
