query processing/ graph based parallel query processingoptimization strategiesparallel object oriented database systemsobject oriented viewMuch work has been accomplished in the past on the subject of parallel query processing and optimization in parallel relational database systems; however, little work on...
Efficient execution is crucial for high-performance, e.g., good query response time or high query throughput. It is obtained by exploiting efficient parallel execution techniques and query optimization which selects the most efficient parallel execution plan among all equivalent plans. The main forms...
During query optimization, SQL Server looks for queries or index operations that might benefit from parallel execution. For these queries, SQL Server inserts exchange operators into the query execution plan to prepare the query for parallel execution. An exchange operator is an operator in a query ...
If the pool defined bymax_parallel_workersis exhausted, the query executor cannot start all the parallel processes that the optimizer planned. This brief introduction is far from exhaustive. For more information, read the PostgreSQL documentation and our articles aboutparallel query optimization,parallel...
They can also include rows being deleted from the table, a new index being created, too much time passing within an open transaction, and so on. WHERE clause For a query to use the parallel query optimization, it must include a WHERE clause. The parallel query optimization speeds up ...
Define Parallel processor. Parallel processor synonyms, Parallel processor pronunciation, Parallel processor translation, English dictionary definition of Parallel processor. n. See parallel processing. American Heritage® Dictionary of the English Lan
Node optimization: DDL requests are always processed on the RootService node. To reduce network overheads, RootService and the tenant leader should be deployed on the same node if possible. Resource consumption: Increasing the concurrency level of concurrent DDL operations, especially table creation op...
Each SQL statement undergoes an optimization and parallelization process when it is parsed. When the data changes, if a more optimal execution or parallelization plan becomes available, Oracle can automatically adapt to the new situation. After the optimizer determines the execution plan of a statement...
Each SQL statement undergoes an optimization and parallelization process when it is parsed. Therefore, when the data changes, if a more optimal execution plan or parallelization plan becomes available, Oracle can automatically adapt to the new situation. (Optimization is discussed in Chapter 20, "...
They discuss current mainstream computer architecture, dominant parallel programming models, and optimization strategies for scientific high performance computing, including the architecture of modern cache-based microprocessors and their performance limitations and general optimization strategies for serial code. ...