The utmost memory in bytes the cached objects can use. Memory made use of is calculated based upon believed sizing of tables and partitions within the cache. Setting it to your negative value disables memory estimation.
No matter if to allow TCP keepalive to the metastore server. Keepalive will avoid accumulation of 50 %-open up connections.
If This is certainly set to true, mapjoin optimization in Hive/Spark will use statistics from TableScan operators at the basis from the operator tree, instead of guardian ReduceSink operators from the Be part of operator.
Exact as hive.metastore.consider.immediate.sql, for go through statements within a transaction that modifies metastore details. On account of non-regular habits in Postgres, if a direct SQL pick out question has incorrect syntax or some thing identical inside of a transaction, all the transaction will fall short and tumble-again to DataNucleus won't be probable. You need to disable the utilization of immediate SQL inside of transactions if that transpires within your scenario.
List of the underlying PAM services that needs to be utilised when hive.server2.authentication form is PAM. A file While using the exact identify ought to exist in /and so on/pam.d.
A COMMA-divided listing of team names the people really should belong to (at the very least among the list of teams) for authentication to triumph. See Group Membership for particulars.
The maximum memory to be used by map-side group aggregation hash desk. In the event the memory usage is bigger than this amount, force to flush facts.
By default, the cache that ORC input format takes advantage of to shop the ORC file footer makes use of really hard references to the cached item. Environment this to accurate can help keep away from out-of-memory challenges under memory force (in some instances) at the expense of slight unpredictability in All round query performance.
Thrift doesn't support nulls in maps, so any nulls current in maps retrieved from item-relational mapping (ORM) has to be possibly pruned or transformed to empty strings.
When enabled, dynamic partitioning column are going to be globally sorted. Related Site In this manner we can preserve only one file author open up for every partition value while in the reducer thus reducing the memory pressure on reducers.
Make column names distinctive in the result set by qualifying column names with table alias if wanted. Desk alias is going to be extra to column names for queries of type "find *" or if question explicitly uses table alias "pick out r1.x..".
While mr stays the default engine for historical reasons, it truly is alone a historical motor and it is deprecated from the Hive two line (HIVE-12300). It may be taken out without the need of more warning.
A Java regex. Configuration Homes that match this regex is often modified by consumer when SQL common base authorization is utilised.
configured with embedded metastore. To have best efficiency, established config to fulfill the following affliction