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From Kashyap Mhaisekar <kashya...@gmail.com>
Subject Storm bolt instances - limits
Date Tue, 05 Jan 2016 21:21:34 GMT
Hi,
I had a question on the no. of instances of bolts that can be defined on a
topology. Here is my use case -
1. 32 GB machine
2. 8 Processors
3. 12 Workers for each box (6700 to 6711)
4. Each worker has been defined with 2G heap and 64mb of XSS. Ulimit for
storm is at 1024

My topology has 5 bolts and a spout and If the combined parallelism is
above 1000, i see OOM errrors indicating - java.lang.OutOfMemoryError:
unable to create new native thread

When this error occurs, topology is getting initialized and has not started
processing.

Is there a guideline from resource perspective as to how many instances can
be created?

Thanks
Kashyap

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