Maximum quantity of entries within the vector Team BY aggregation hashtables. Exceeding this may result in a flush in spite of memory strain affliction.
No matter if to run the initiator and cleaner threads on this metastore occasion. Set this to accurate on one occasion of the Thrift metastore support as Section of turning on Hive transactions. For an entire listing of parameters necessary for turning on transactions, see hive.txn.supervisor.
Regardless of whether to get rid of the union and push the operators involving union as well as the filesink over union. This avoids an additional scan with the output by union.
Give an approximation of the maximum number of jobs that ought to be executed prior to dynamically making another list of tasks.
If this is established to correct, mapjoin optimization in Hive/Spark will use supply file sizes linked to the TableScan operator on the foundation of your operator tree, rather than using operator statistics.
Session might be closed when link is closed. Established this to Bogus to web link acquire session outlive its guardian relationship.
If turned on, splits created by ORC will incorporate metadata regarding the stripes in the file. This info is read remotely (with the consumer or HiveServer2 device) and despatched to all of the tasks.
When hive.optimize.limittranspose is accurate, this variable specifies the minimum share (fractional) reduction of your size in the outer input on the sign up for or enter of the union that the optimizer should get to be able to use the rule.
This limitations the volume of partitions which can be asked for from your Metastore go to this web-site for just a provided table. A question won't be executed if it makes an attempt to fetch additional partitions for every table compared to the limit configured.
Root directory to the replica warehouse wherever the repl sub-program will retail store jars from the first warehouse.
No matter if to insert into multilevel nested directories like "insert directory '/HIVEFT25686/chinna/' from desk".
Typical error permitted for NDV estimates, expressed in share. This presents a tradeoff among precision and compute Price. A reduced worth for your error suggests better accuracy and a better compute Price tag. (NDV indicates quantity of distinct values.)
In the process of Mapjoin, The real key/benefit will be held during the hashtable. visit site This benefit suggests the load component to the in-memory hashtable.
Quantity of consecutive unsuccessful compactions for your presented partition and then the Initiator will quit trying to plan compactions mechanically.