'Trace query' diaporamas de présentation

How Much Do Concurrent Updates Impact Query Performance in Oracle?

How Much Do Concurrent Updates Impact Query Performance in Oracle? . Roger Schrag Database Specialists, Inc. www.dbspecialists.com. Today's Session. Read-consistency and concurrency: Basic concepts How Oracle does it Other approaches Theoretical cost of read-consistency in Oracle

756 views • 59 slides

Overcoming Limitations of Sampling for Aggregation Queries

Overcoming Limitations of Sampling for Aggregation Queries. Surajit Chaudhuri, Microsoft Research Gautam Das, Microsoft Research Mayur Datar, Stanford University Rajiv Motwani, Stanford University Vivek Narasayya, Microsoft Research. Presented by Daniel Kuang CSE@UTA. Outline.

576 views • 22 slides

Railinc Tracing Solutions

301 views • 10 slides