The maximum memory for use for hash in RS operator for prime K choice. The default value "-one" suggests no limit.
Apart from the configuration properties listed in this section, some Homes in other sections also are relevant to ORC:
LDAP relationship URL(s), benefit could possibly be an area divided listing of URLs to several LDAP servers for resiliency. URLs are tried using inside the buy specified right until the connection is productive.
Specifies a completely qualified domain user to utilize when binding to LDAP for authentication, in lieu of utilizing the person by itself. This allows for situations the place all people haven't got lookup permissions on LDAP, instead demanding just the bind user to possess search permissions.
Highest amount of rows allowed for just a smaller subset of information for easy Restrict, whether it is a fetch question. Insert queries are usually not restricted by this Restrict.
LDAP link URL(s), benefit could possibly be an area separated listing of URLs to numerous LDAP servers for resiliency. URLs are tried out within the order specified until eventually the connection is prosperous.
Whether column accesses are tracked during the QueryPlan. This check here is useful to detect how tables are accessed and to find out if there are squandered columns that can be trimmed.
When hive.enhance.limittranspose is true, this variable specifies the nominal percentage (fractional) reduction of your measurement from the outer enter of your sign up for or input on the union which the optimizer ought to get in an effort to utilize the rule.
The utmost data dimensions for the dimension table that generates partition pruning information. If reaches this Restrict, the optimization will likely be turned off.
Whilst mr continues to be the default motor for historical reasons, it is actually by itself a historical motor and is particularly deprecated from the Hive 2 line (HIVE-12300). It could be taken off without having additional warning.
Make column names distinctive in The end result set by qualifying column names with desk alias if necessary. Desk alias are going to be additional to column names for queries of form "select *" or if query explicitly works by using desk alias "choose r1.x..".
Greatest variety of reducers that can be employed. In the event the 1 laid out in the configuration residence mapred.lessen.tasks is destructive, Hive will use this as the utmost variety of reducers when instantly determining the volume of reducers.
If a position fails, whether to provide a website link inside the CLI on the process with the most failures, along with debugging hints if relevant.
configured with embedded metastore. To acquire optimum overall performance, established config to satisfy the following condition