[PDF] Top 20 Performance Evaluation of Materialized Query

... that, query performance degrades since they have to go through large volumes of data after making multiple ...same query is fired by multiple users is also high. Hence each time same query is ... See full document

... for query processing. Experimental evaluation is done on two different real databases contains 50000 and 250000 duplicate records ...time performance is better than without MapReduce ... See full document

... three query topics per day from a collection of 60 query ...The query topics contain an average query length ...pre-defined query topics is accumulated from a variety of users with ... See full document

... database query languages, in particular of relational algebra, and of file systems, including some basic knowledge of index ...1, query processing fills the gap between database query languages and ... See full document

... its performance in solving query speed of distributed web ...The evaluation results have shown that GUIDs is better compared to ID in distributed Web crawlers’ environment as it usage could reduce ... See full document

... - Customizable index structures for best query evaluation performance - Scalable indexing performance achieved through proper mapping to NoSQL databases - IndexedHBase: reliable index st[r] ... See full document

... have performance limitations and need to find ways to optimize ...are query response time and understanding of structure of the data source (source ...schema). Query response time plays an important ... See full document

... procedural query language is embedded in a high level programming language and the programmer’s should select the most appropriate execution ...Structured Query Language (SQL), the user specifies what data ... See full document

... warehouse performance optimization tool. The DW performance is considered the main concern for designers ...This performance is based on optimization of the queries execution ...and ... See full document

... with query interface in support of Decision support ...process, query interface and reporting system. Materialized views (MV) are the pre calculated views which are used to increase the DW system ... See full document

... to query objects, called keyword ...of query keywords and minimum distance between ...object evaluation for the decision ...various query keywords toa generate candidate keyword ...The ... See full document

... Classical query optimization using restructured views can result in significant addi- tional savings in query-evaluation costs, and some commercial database systems are adding facilities for the ... See full document

... OR...) NOT (Medline[SB] OR OldMedline[SB])) (Table 1). The exclusion of OldMedline subset allows this query to focus on Pre-MEDLINE citations ("as supplied by publisher ” and “ in process ” citations), which ... See full document

... the evaluation of many factors like developer friendliness, scalability, usability and ...all evaluation factors, performance is considered a key factor in judging the usability of this ...detailed ... See full document

... One of the most basic considerations that an optimizer must be aware of when enumerating alternative plans is whether or not pipelining is present. Pipelining is where the result of one operator is immediately directed ... See full document

... the query cost constraint to choose a group of views to materialize to make sure the maintain cost is ...the materialized view selection in this paper; the results show that the performance of ... See full document

... 2. Mandl, T., Agosti, M., Di Nunzio, G., Yeh, A., Mani, I., Doran, C., Schulz, J.M.: LogCLEF 2009: the CLEF 2009 Cross-Language Logfile Analysis Track Overview. In Peters, C., Di Nunzio, G., Kurimo, M., Mandl, T., ... See full document

... The materialized view is most beneficial for improving query performance as it stores pre-computed ...of query, cost of maintenance, net benefit & storage ...other materialized view ... See full document

... Rainbow [28] is designed to exploit relational database technology to manage XML data based on a flexible mapping strategy. Input queries expressed as XQuery are used to generate an extraction view query to create ... See full document

... But if the attributes placed at the mediator are not proper then performance of the query will not be up to the mark. The primary intent of this research is to develop a system which will reduce the ... See full document