CODEWITHSUNDEEP
amazon-emrpresto
moontartan
moontartan

Reputation: 31

No Worker Parallelism During Presto Query on AWS EMR

I have set up a presto cluster on AWS EMR querying from an S3 Bucket. I am exploring the cluster overview metrics as I run queries, and I notice that even though there are 2 available worker nodes, there is 0 worker parallelism. I was wondering why that was.

cluster overview image of query

Upvotes: 2

Views: 1140

Answers (1)

Piotr Findeisen
Piotr Findeisen

Reputation: 20770

Worker parallelism is a metric showing how much CPU you use across the nodes. If you do not query Presto, or queries are not CPU intensive (e.g. are bottlenecked on IO), you will not see worker parallelism.

Upvotes: 3

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