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SQL Server 2017 Developer???s Guide
book

SQL Server 2017 Developer???s Guide

by Dejan Sarka, Miloš Radivojević, William Durkin
March 2018
Intermediate to advanced content levelIntermediate to advanced
816 pages
19h 35m
English
Packt Publishing
Content preview from SQL Server 2017 Developer???s Guide

Batch processing

With columnar storage, the CPU can become a bottleneck. SQL Server solves these problems with batch mode processing. In batch mode processing, SQL Server processes data in batches rather than processing one row at a time. A batch represents roughly 900 rows of data. Each column within a batch is stored as a vector in a separate memory area, meaning that batch mode processing is vector-based. Batch mode processing interrupts a processor with metadata only once per batch rather than once per row, as in row mode processing, which lowers the CPU burden substantially. This means that batch mode spreads the metadata access costs over all of the 900 rows in a batch.

Batch mode processing is orthogonal to columnar storage. This means ...

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Publisher Resources

ISBN: 9781788476195Supplemental Content