![]() In CDH 5.7 and later, Cloudera Manager starts the HS2 service with 4 GB heap size by default unless hosts have insufficient memory.Resolve HS2 memory-related issues, confirm that the HS2 heap size is set properly for your environment. Optimal HS2 heap size configuration depends on several factors, including workload characteristics, number of concurrent clients, and the partitioning of underlying Hive tables. From the Actions drop-down menu, select Restart to restart the client service.The following example sets the PermGen space to 512M and specifies IPv4: Set the PermGen space for Java garbage collection to 512M in Client Java Configuration Options. To set garbage collection, go to Home > Hive > Configuration > Gateway > Advanced. ![]() Set Client Java Heap Size in Bytes to at least 2 GiB and click Save Changes.To set heap size, go to Home > Hive > Configuration > Gateway > Resource Management.To configure heap size and garbage collection for the Beeline CLI: From the Actions drop-down menu, select Restart to restart the Hive Metastore service.For anĮxample of this setting, see step 4 above for configuring garbage collection for HiveServer2. ParNewGC), and enable or disable the garbage collection overhead limit in Java Configuration Options for Hive Metastore Server. Set the PermGen space for Java garbage collection to 512M, the type of garbage collector used ( ConcMarkSweepGC or.To set garbage collection, go to Home > Hive > Configuration > Hive Metastore Server > Advanced.Set Java Heap Size of Hive Metastore Server in Bytes to the desired value, and click Save Changes.To set heap size, go to Home > Hive > Configuration > Hive Metastore > Resource Management.To configure heap size and garbage collection for the Hive metastore: From the Actions drop-down menu, select Restart to restart the HiveServer2 service.XX:MaxPermSize=512M -XX:+UseParNewGC -XX:-UseGCOverheadLimit The following example sets the PermGen space to 512M, uses the new Parallel Collector, and disables the garbage collection overhead limit: ParNewGC), and enable or disable the garbage collection overhead limit in Java Configuration Options for HiveServer2. Set the PermGen space for Java garbage collection to 512M, the type of garbage collector used ( ConcMarkSweepGC or To set garbage collection, go to Home > Hive > Configuration > HiveServer2 > Advanced.Set Java Heap Size of HiveServer2 in Bytes to the desired value, and click Save Changes.To set heap size, go to Home > Hive > Configuration > HiveServer2 > Resource Management.To configure heap size and garbage collection for HiveServer2: Set this value using the Java Heap Size of Hive Metastore Server in Bytes Hive configuration property. Backend database that is used to store metadata if the database server is also hosted on the same node.This disk is required so that the Hive metastore can store the following artifacts: Set this value using the Java Heap Size of HiveServer2 in Bytes Hive configuration property.įor more information, see Tuning Hive in CDH. The size to reduce the impact of Java garbage collection on active processing by the service. Any temporary files that might be created by local map tasks under the /tmp directoryĬloudera recommends splitting HiveServer2 into multiple instances and load balancing them once you start allocating more than 12 GB to HiveServer2.Operation logs stored in the operation_logs_dir directory, which is configurable.HiveServer2 Performance Tuning and Troubleshooting.Heap Size and Garbage Collection for Hive Components.The following sections provide details on implementing these best practices to maximize performance for deployments of HiveServer2 and the Hive metastore.įor more information about tuning Hive, see Tuning Apache Hive Performance on the Amazon S3 Filesystem in Limit column width, and keep the number of columns under 1,000. Do not create thousands of table partitions that might cause queriesĬontaining JOINs to overtax HiveServer2 and the Hive metastore. Review the underlying Hive table design, which is crucial to maximizing the throughput of Hive query workloads.Materialize all columns of accessed Hive tables when only a subset is necessary. Review your Hive query workloads to make sure queries are not overly complex, that they do not access large numbers of Hive table partitions, or that they force the system to.HiveServer2 and Hive metastore operations. Configure CDH clusters for the maximum allowed heap memory size, load-balance concurrent connections across your CDH Hive components, and allocate adequate memory to support.To maximize performance of your Apache Hive query workloads, you need to optimize cluster configurations, queries, and underlying Hive table design.
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