If ORC reader encounters corrupt details, this benefit are going to be made use of to ascertain whether to skip the corrupt details or toss an exception. The default behavior should be to throw an exception.
Let JDO query pushdown for integral partition columns in metastore. Off by default. This enhances metastore overall performance for integral columns, particularly when there is certainly a large number of partitions.
Period of time the Spark Distant Driver ought to watch for a Spark work to generally be submitted prior to shutting down. If a Spark job isn't released immediately after this period of time, the Spark Remote Driver will shutdown, Consequently releasing any assets it has been Keeping onto.
When real, this activates dynamic partition pruning for the Spark engine, making sure that joins on partition keys will probably be processed by composing to A brief HDFS file, and skim afterwards for removing needless partitions.
To estimate the dimensions of knowledge flowing by means of operators in Hive/Tez (for reducer estimation etc.), common row sizing is multiplied with the entire amount of rows coming out of each operator.
The most memory for use for hash in RS operator for top rated K collection. The default benefit "-one" indicates no Restrict.
Establish if we obtain a skew critical in join. If we see much more than the desired quantity of rows Using the exact essential in join operator, we expect The main element as a skew be a part of vital.
The privileges quickly granted for the proprietor whenever a table will get made. An example like "pick,fall" will grant find and drop privilege for the proprietor of your table. Be aware that the default provides the creator of a table no usage of the desk.
The maximum details dimension with the dimension desk that generates partition pruning details. If reaches this Restrict, the optimization will probably be turned off.
The Hive/Tez optimizer estimates the information size flowing by way of Every on the operators. The Sign up for operator utilizes column statistics to estimate the quantity of rows flowing outside of it and therefore find out the data dimensions.
Figure out if we obtain a skew important in be a part of. If we see a lot more than the desired variety of rows Along with the similar essential in be a part of operator, we think the key as being a skew join key.
The maximum memory in bytes that the cached objects can use. Memory employed is calculated dependant on estimated size of tables and partitions within the cache. Setting it to a negative benefit disables memory estimation.
A Java regex. Configuration Attributes that match this regex can be modified by user when SQL standard base authorization is employed.
This flag really should be set to correct to limit utilization of indigenous vector map be part of hash tables for the MultiKey in queries employing MapJoin.