Irrespective of whether to improve multi team by question to crank out only one M/R position program. Should the multi team by query has frequent team by keys, It'll be optimized to generate one M/R career. (This configuration residence was taken out in release 0.nine.0.)
Listing of the fundamental PAM providers that ought to be employed when hive.server2.authentication type is PAM. A file Together with the same name should exist in /etc/pam.d.
When hive.enhance.limittranspose is correct, this variable specifies the nominal reduction while in the variety of tuples from the outer input from the join or input from the union which the optimizer should get so as to apply the rule.
Must the metastore do authorization checks from the fundamental storage for functions like fall-partition (disallow the fall-partition Should the consumer in concern doesn't have permissions to delete the corresponding directory within the storage).
During the absence of table/partition statistics, typical row dimension will likely be accustomed to estimate the amount of rows/info dimension.
No matter if writes to HBase should be pressured towards the produce-ahead log. Disabling this increases HBase produce functionality at the potential risk of missing writes in case of a crash.
Time in milliseconds in between runs on the cleaner thread. Escalating this value will lengthen some time it's going to take to clean up old, not used versions of data and reduce the load about the metastore server.
If This really is established to correct, mapjoin optimization in Hive/Spark will use statistics from TableScan operators at the root with the operator tree, in place of father or mother ReduceSink operators of the Be part of operator.
The read the article most memory for use by map-side group aggregation hash desk. Should the memory usage is larger than this variety, pressure to flush details.
Specifies a fully certified area person to use when binding to LDAP for authentication, as an alternative to utilizing the person itself. This allows for situations where by all customers don't have look for permissions on LDAP, as an alternative demanding just the bind user to acquire look for permissions.
Time after which transactions are declared aborted Should the client has not despatched a heartbeat, in seconds.
If enabled dictionary Examine will take place soon after 1st row index stride (default 10000 rows) else dictionary Examine will take place prior to writing initially stripe. In equally situations, the decision to employ dictionary or not might be retained thereafter.
Makes vital schema with a startup if 1 doesn't exist. Set this to Fake, immediately after creating it once.
When legitimate, retains a lock file from the scratch directory. If a Hive approach dies and accidentally leaves a dangling scratchdir behind, the cleardanglingscratchdir Software will take out it.