Hi everyone,

Our topology consumes tuples from a Kestrel MQ and runs a series of bolts
to process items including some db connections. Storm version is 0.8.3 and
supervisors are run on VMs.
When number of tuples increases in queue, we observe that, a single tuple
execution time also rise  dramatically in paralel which ends up with a
throttle behaviour.
In the meantime CPU and memory usage looks comfortable.From database point,
we have not observed a problem so far under stress.
Is there any configuration trick or an advice for handling such a load?
There is already a limit on MAX_SPOUT_PENDING as 32.

Thanks,

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