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In addition to the Hive metastore properties outlined On this area, some Homes are detailed in other sections:

Regardless of whether to optimize multi team by query to create a single M/R work approach. If the multi team by question has common group by keys, It's going to be optimized to produce one M/R work.

When enabled, this feature allows a person script to exit successfully devoid of consuming all the info with the conventional enter.

When true, retains a lock file while in the scratch Listing. If a Hive procedure dies and unintentionally leaves a dangling scratchdir guiding, the cleardanglingscratchdir tool will remove it.

To estimate the size of information flowing by means of operators in Hive/Tez (for reducer estimation and so forth.), ordinary row size is multiplied with the entire variety of rows popping out of every operator.

No matter whether to implement operator stats to ascertain reducer parallelism for Hive on Spark. If this is fake, Hive will use resource table stats to find out reducer parallelism for all to start with degree minimize jobs, and the maximum reducer parallelism from all dad and mom for all the rest (second stage and onward) reducer tasks.

The most memory to be used by map-side team aggregation hash table. If the memory usage is greater than this quantity, force to flush facts.

Listing of comma-divided keys developing in desk Attributes that will get inherited to newly developed partitions. * implies every one of the keys will get inherited.

To run the MSCK REPAIR Desk command batch-smart. If there is numerous untracked partitions, by configuring a price into the assets it's going to execute in batches internally. The default worth of the residence is zero, which implies it can execute each of the partitions simultaneously.

When enabled, dynamic partitioning column are going to be globally sorted. This fashion we are able to keep just one report author open up for each partition benefit inside the reducer thus lowering the memory force on reducers.

When hive.enhance.limittranspose is accurate, this variable specifies the nominal proportion (fractional) reduction from the size on the outer enter great site of the join or input from the union the optimizer should really get as a way to apply the rule.

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This variety usually means exactly how much memory the regional activity may take to carry The crucial element/worth into an in-memory hash desk when this map sign up for is followed by a group by.