Restricting the Maximum Number of Maps for Hive Tasks

Scenario

• This function applies to Hive.
• This function is used to limit the maximum number of maps for Hive tasks on the server to avoid performance deterioration caused by overload of the HiveSever service.

Procedure

1. Log in to FusionInsight Manager. For details, see Accessing FusionInsight Manager. Choose Cluster > Services > Hive > Configurations > All Configurations.
2. Choose MetaStore(Role) > Customization, add a customized parameter to the hivemetastore-site.xml parameter file, set Name to hive.mapreduce.per.task.max.splits, and set the parameter to a large value. Restart all Hive instances after the modification.