The query processor could not start the necessary thread resources for parallel query execution.
查询处理器未能为并行查询的执行启动必要的线程资源。
The following sections lists some of the most important factors that impact parallel query performance.
下列几点列出了影响平行查询效能的一些最重要因素。
This method cuts down query plan search space greatly, thus ensures the quality of parallel query execution plans.
这种优化方法大大地缩减了查询执行计划空间，确保了并行查询执行计划的优化性。
And it implements parallel query processing through query localization based on data partitioning and replication.
利用数据划分和复制将查询本地化从而实现并行查询。
The multi-join query optimization is the critical problem of parallel query optimization in parallel database system.
多连接查询优化是并行数据库系统的核心问题。
The search space of parallel query execution plan is exponential complexity. How to prune the search space efficiently is the key problem of parallel query optimization.
并行查询执行计划的搜索空间里指数级增长，如何高效地裁剪搜索空间是并行查询优化的关键所在。
I can also process the results from each query in parallel, printing them to the screen as they arrive.
我也可以并行处理每个查询所得结果，在其到达时打印到屏幕。
When the DB2 optimizer forms a query access plan for a query, it divides the work among the database partitions which work in parallel.
当DB 2优化器为一个查询形成查询访问计划时，它将工作划分到多个数据库分区上，这些数据库分区是并行工作的。
A query that USES the common dimensions is executed in parallel for each of the composing cubes, and the results are aggregated according to the virtual cube merge operator.
使用相同维度的查询将同时在每个子数据集中执行，得到的结果根据虚拟数据集的合并运算符进行合并。
The optimizer in Informix Extended Parallel Server (XPS) could use more than one index on each table in a query, and now Informix 11.7 can as well.
InformixExtendedParallelServer (XPS)中的优化器可以在一个查询中使用每个表上的多个索引，现在Informix 11.7也可以。
DB2 UDB V5 extended parallel processing even further by introducing sysplex query parallelism.
DB 2UDBV 5引入了sysplex查询并行，进一步扩展了并行处理。
With this method a single query causes DB2 to generate several tasks, which are executed in parallel to access the data.
通过这种方法，一条查询可以使DB2生成多个任务，这些任务被并行地执行，以访问数据。
This would typically happen in parallel, as each node receives and performs the query on its locally cached state. And returns results.
通常这都是并发行为，因为每个结点都会在其本地的缓存状态上接收并执行查询，最后返回结果。
The compilation of the query on the remote server and fetching of enough data to fill the ATQ buffer on all legs of the UNION will proceed in parallel.
查询在远程服务器上的编译，以及取足够的数据来填充union所有分支上的AT Q缓冲区，这两个过程是并行进行的。
If database query and Web service invocation could occur in parallel, the asynchronous case would behave better.
如果数据库查询和Web服务调用并行进行，异步用例表现更加良好。
The key problem is how to prune the big search space in order to get an optimized query plan for query parallel optimization.
并行查询优化器的目标是缩减庞大的计划搜索空间，获得优化的查询规划。
Query optimization is the critical technique of parallel database systems.
查询优化是并行数据库系统的核心技术。
Query optimization and processing is a critical component of parallel database systems.
查询优化和处理是并行数据库管理系统的关键组成部分。
Based on this, the parallel processing strategy for cyclic query is proposed.
以此为基础，进一步提出了循环查询的并行处理策略。
Owing to the achievements in parallel information retrieval research, it is possible to query quickly the large-capacity database in retrieval system and to cut short the response time.
并行信息检索研究领域的开辟，使快速查询检索系统中的大容量数据库和有效缩短检索响应时间成为可能。
To improve the execution efficiency of the query processors, the authors exploit heuristics to seek the optimum parallel scheduling execution plan for multi-join expressions.
为了提高查询处理器的执行效率，采用启发式规则来搜索最优的多连接表达式并行调度执行计划。
Data declustering is the foundation of the parallel processing of database query, which has significant effect on query performance.
数据分布是数据库查询并行处理的基础，良好的数据分布方法对查询性能有着重要影响。
This paper discusses the understanding on the parallel database from the architecture of parallel database systems, parallel database query, aggregation, sorting, and data reliability.
本文从并行数据库系统的体系结构、并行数据库的查询，聚集，排序及数据可靠性等方面入手，阐述了对并行数据库的认识和看法。
This paper presents a new parallel migration strategy for a query plan in order to adapt the continuity of queries and variability of system environment and date itself.
数据流中的查询计划需要不断进行适应性优化，针对该特征提出一种查询计划的并行迁移策略。
Specifically, it looks for query operators or combinations of operators that typically cause a query to execute more slowly in parallel mode.
具体而言，它将查找通常会导致查询在并行模式下运行更慢的查询运算符或运算符组合。
This paper presents an optimized query algorithm, which adopts direct-join using data partition and parallel processing. It can reduce the response time of query process.
本文利用数据分片和并行处理策略，提出一种采用直接连接的查询优化算法，能有效地缩减查询处理的响应时间。
Use this flag in cases where you know that parallel execution of the query will result in speedup, but PLINQ in the Default mode would execute it as sequential.
如果认为并行执行查询将带来加速，则使用此标志，但处于默认模式的PLINQ将按顺序执行它。
Another advantage to using query syntax is that you can execute those queries in parallel using the. AsParallel method.
另一个优点是，使用查询语法你可以使用AsParallel方法并行执行这些查询。
To achieve speedup, a PLINQ query must have enough delightfully parallel work to offset the overhead.
为了实现加速，PLINQ查询必须具有足够的适合并行工作来弥补开销。
To achieve speedup, a PLINQ query must have enough delightfully parallel work to offset the overhead.
为了实现加速，PLINQ查询必须具有足够的适合并行工作来弥补开销。
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