Multi-Threaded Log Writer

Chris Adkin has a very detailed post digging into log writer changes affecting high-scale throughput:

To understand why we get this performance degradation with SQL Server 2016 RC1 three key parts of a transactions life cycle need to be understood along with the serialisation mechanisms that protect them

Chris digs into call stacks as part of his post.  We’ll see if there are some performance improvements between now and RTM on this front.

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Tuning Apache Spark Applications

Vidisha Gupta has a few tips for tuning Apache Spark programs: Data Serialization – Serialization plays an important role in increasing the performance of any application. Spark provides two serialization libraries – Java Serialization: By default, spark uses Java’s ObjectOutputStream framework which can work with any class that implements java.io.serializable. This serialization is flexible but slow and […]

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A Compendium Of Bad (Or Misleading) Performance Tips

Grant Fritchey responds to a long list of performance tips of greater or (mostly) lesser value: Index the predicates in JOIN, WHERE, ORDER BY and GROUP BY clauses What about the HAVING clause? Does the column order matter? Should we put a single column or multi-column index? INCLUDE statements? What kind of index, clustered, non-clustered, […]

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