When hive.improve.limittranspose is real, this variable specifies the minimum reduction within the quantity of tuples of your outer enter with the be a part of or input from the union that the optimizer should really get so that you can implement the rule.
A favourable integer that determines the volume of Tez sessions that ought to be launched on each with the queues specified by hive.server2.tez.default.queues. Establishes the parallelism on Each and every queue.
Results in required schema on a startup if 1 doesn't exist. Reset this to Wrong, soon after developing it when.
This configuration assets allows the person to deliver a comma-separated listing of URLs which provide the sort and location of Hadoop credential vendors.
This flag needs to be set to legitimate to permit vectorized manner of question execution. The default benefit is false.
No matter whether Hive is functioning in take a look at mode. If Sure, it activates sampling and prefixes the output tablename.
Besides the configuration Houses detailed During this area, some properties in other sections also are linked to Spark:
No matter if to get rid of the union and force the operators among union along with the filesink previously mentioned union. This avoids an extra scan on the output by union.
Sizing of your wait queue for async thread pool in HiveServer2. Immediately after hitting this limit, the async thread pool will reject new requests.
Aside from the configuration Qualities detailed In this particular part, some Qualities in other sections also are relevant to Spark:
When hive.optimize.limittranspose is accurate, this variable specifies the small proportion (fractional) reduction from the size with the outer enter in the sign up for or enter in the union which the optimizer really should get in order to apply the rule.
Reserved length for postfix of statistics key. At this time only significant for counter sort statistics which ought to continue to keep the length of the complete statistics key scaled-down than the utmost duration configured by hive.
Keytab file for SPNEGO principal, optional. A typical worth would look like /etcetera/safety/keytabs/spnego.
This flag ought to have a peek at this site be established to true to restrict usage of native vector map be a part of hash tables into the MultiKey in queries making use of MapJoin.