Hi Margus,

I believe that your memory settings are enough. Giving more memory will
likely increase duration of garbage collections and won't increase your
performances. Others on this mailing list will probably be able to give
better recommendations on this one. Also, keep in mind that volatile
repositories can cause data loss in case of NiFi shutdown.

I wanted to answer your question to check if you tried to increase the
number of concurrent tasks in your SplitJson processor (if you have enough
resources, that will likely improve the throughput), but also, if you
increased the run duration of the processor? That's something that can make
a huge difference on the performances if you don't care about latency.

Also, it depends of what your are doing with your data, but did you
consider the new records oriented processors? If your use case can fit with
the record processors, that will certainly improve the overall performances
of your workflow.


2017-08-10 7:50 GMT+02:00 Margus Roo <mar...@roo.ee>:

> Hi
> I am playing with nifi performance using one nifi node.
> At the moment I think the bottleneck in my flow is SplitJson processor who
> can work with 2 000 000 items per 5 minutes (downstrem queues are not full
> and queue before SplitJson is constantly full).
> I tried to change as much repos to volatile but if I change content repo
> to volatile then speed degrees a lot 2 000 000 to 5000 or smth.
> Befor I set content repo to volatile I increased volatile content repo max
> size:
> nifi.volatile.content.repository.max.size=12GB
> Do I need increase JVM setting that content repo can live inside JVM?
> At the moment I have:
> # JVM memory settings
> java.arg.2=-Xms2048m
> java.arg.3=-Xmx46384m
> --
> Margus (margusja) Roohttp://margus.roo.ee
> skype: margusjahttps://www.facebook.com/allan.tuuring+372 51 48 780 
> <+372%20514%208780>

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