The interval with which to poll the JobTracker for the counters the functioning job. The smaller sized it's the extra load there will be to the jobtracker, the upper it is the considerably less granular the caught is going to be.
Ought to rework the mapred operate or not. This is very first launched by SymlinkTextInputFormat to switch symlink documents with authentic paths at compile time.
This flag really should be established to legitimate to restrict use of indigenous vector map be a part of hash tables to the MultiKey in queries applying MapJoin.
Utmost quantity of reducers that will be employed. Should the 1 specified in the configuration home mapred.cut down.duties is damaging, Hive will use this as the most number of reducers when automatically deciding the number of reducers.
Indicates whether or not replication dump should really incorporate information regarding ACID tables. It should be applied together with hive.
To estimate the scale of information flowing by operators in Hive/Tez (for reducer estimation and so on.), average row measurement is multiplied with the total amount of rows coming out of each operator.
With hive.server2.session.Examine.interval set to your beneficial time price, session will likely be closed when it isn't visit here really accessed for this length of your time, which may be disabled by environment to zero pop over to these guys or negative price.
If this is established to genuine, mapjoin optimization in Hive/Spark will use statistics from TableScan operators at the foundation of your operator tree, rather than mother or father ReduceSink operators on the Be a part of operator.
The check interval for session/Procedure timeout, which can be disabled by environment to zero or negative price.
Highest amount of bytes a script is permitted to emit to straightforward error (for every map-lower task). This helps prevent runaway scripts from filling logs partitions to capacity.
When hive.optimize.limittranspose is accurate, this variable specifies the minimum share (fractional) reduction of the size from the outer enter of your sign up for or enter with the union the optimizer need to get in an effort to implement the rule.
A comma separated list of builtin UDFs that aren't permitted to be executed. A UDF that is definitely A part of the checklist will return an error additional hints if invoked from a question.
Makes important schema on the startup if 1 won't exist. Set this to Phony, soon after making it at the time.
Identify of the surroundings variable that retains the exceptional script operator ID in the user's change purpose (the tailor made mapper/reducer which the person has laid out in the question).