Asynchronous Elapsed Time Question
Greetings All,
I am new to asynchronous calls within dT and am having issues correlating all of the elapsed times to the appropriate call outs. I am attaching a session file in which there is one PurePath that takes 185 seconds in duration. I have been able to correlate all of the external calls, however there is one huge gap between ~64 seconds and ~185 seconds that seems to go unaccounted for.
Background on the application
This is new application to dT monitoring and have no instrumented methods other than auto-sensors and there may exist a load balancer between JBOSS and DB tier.
Background on the session
This is a single transaction of a "validation" step made within the end user's web browser.
Please let me know if you have any other questions.
Thanks
Chris Sechler
hi Chris,
i guess your question is: what happened between 64 and 185 seconds, right?
so basically this has nothing to do with asynchronous calls at all, because all of this happens on one thread (PMTPPoolID-1-UNBOUNDED-threadID-21 <1910437121>). so what we can say so far is that in these 121 seconds no database access happens, but not what actually really happens.
usually you should get more information by auto-sensors in this scenario, but i guess there's some auto-sensor matching issue on this PurePath. because in the 185s there were 12314 auto-sensor samples captured which would result in one every 15ms. however, this PurePath has a very recurring structure with all the getConnection()s which makes auto-sensor matching really difficult. in 5.6 where we will have connection aggregation as well, the structure of this PurePath will be somewhat simpler.
right now I can talk to R&D and see if we get some more information about your PurePath and keep you posted.
best,
Christian
after some research i found out that there was a bug in dynaTrace 5.5 which affected auto-sensor matching in conjunction with JDBC statement aggregation. this was already fixed some time ago in a fixpack and will also be fixed in the upcoming dynaTrace 5.6 release. so in your case you would have multiple options:
- turn off JDBC statement aggregation to get better auto-sensor data
- wait for 5.6 to be released soon to have this bug fixed
- try out the fixpack
hope this helps
Christian,
Thanks so much for the research and responses. Since 5.6 will be released soon, this is most likely the route I will take. However, I will consult with my client to see what route they wish to take.
Chris
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