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Impala Admission control maximum concurrency queries: global or per impalad?
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Apache Impala
Created on ‎03-12-2019 02:04 PM - edited ‎09-16-2022 07:13 AM
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Hi,
If I set the following property in Impala config for admission control and pool "default", in llama-site.xml:
<property>
<name>llama.am.throttling.maximum.placed.reservations.root.default</name>
<value>4</value>
</property>
Suppose I have 3 Impala nodes and all of them have the same configuration above.
Does that mean I can run up to 12 concurrent queries (4 in each impalad) in default pool or just 4 overall?
Thanks,
Paulo.
Created ‎03-14-2019 11:46 AM
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the property "llama.am.throttling.maximum.placed.reservations.root.*" places a limit on the total number of queries across the cluster. So in this case you can only run 4 overall
Created ‎03-14-2019 11:46 AM
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the property "llama.am.throttling.maximum.placed.reservations.root.*" places a limit on the total number of queries across the cluster. So in this case you can only run 4 overall
Created ‎03-14-2019 12:43 PM
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