'Blocking factor' presentation slideshows

Cost Estimation for Relational Algebra Queries

Cost Estimation for Relational Algebra Queries. Suppose I have a query like P ( ename) [ s (ID# = 1234) (Emp)] How to retrieve the data from the disk? The best choice depends on the type of query and the type of file structure present. Simple Query Types. Exact matches on a unique attribute.

487 views • 35 slides

Query Processing

Query Processing. Steps in Query Processing. Validate and translate the query Good syntax. All referenced relations exist. Translate the SQL to relational algebra. Optimize Make it run faster. Evaluate. Translation Example. Possible SQL Query: SELECT balance FROM account

441 views • 31 slides

Intermediate Applied Statistics STAT 460

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TWO WAY ANOVA WITHOUT REPLICATION

Also known as Randomized Block Design (RBD) In RBD there is one factor or variable that is of primary interest. However, there are also several other nuisance factors. Nuisance factors are those that may affect the measured result, but are not of primary interest.

286 views • 15 slides

Adapted from UCB CS252 S01, Revised by Zhao Zhang in ISU CPRE 585 F04

Lecture 15: Software Approaches for Cache Optimizations. Adapted from UCB CS252 S01, Revised by Zhao Zhang in ISU CPRE 585 F04. Adapted from UCB CS252 S01. Reducing Misses by Compiler Optimizing Memory Layout or Access Pattern.

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Reducing Misses using Compiler Optimizations

Reducing Misses using Compiler Optimizations. McFarling [1989] reduced caches misses by 75% on 8KB direct mapped cache, 4 byte blocks in software Instructions Reorder procedures in memory so as to reduce conflict misses Profiling to look at conflicts(using tools they developed) Data

198 views • 8 slides

Latin Square Designs

365 views • 7 slides

Latin Square Designs

164 views • 7 slides