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Wednesday, October 21 • 06:30 - 07:00
In and Out of the Weeds With MongoDB 4.4 Hedged Reads

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When the MongoDB 4.4 release came out over the summer, it brought along several new features designed to improve performance overall. One of these was introducing Hedged Reads to address latency issues. High latency is annoying to end-users – just ask us. But that annoyance can lead to lost revenues. So… anything that can be safely done to reduce latency must be great right? We’ll see!
I’ll take us down into the grass and talk about what Hedged Reads are, how to enable and disable them, associated read preferences, how it determines which nodes to query for the results, and more. Then we’ll take a look at some query differences when enabled vs disabled and the performance benefits that may help get your application out of the weeds. And I’ll also address a few gotchas that might make you reconsider how bad those weeds really were.

avatar for Dimitri Vanoverbeke

Dimitri Vanoverbeke

Senior Solutions Engineer, Percona
As a young padwan, Dimitri was triggered into IT by an early adoption in BASIC, DOS, the early windows era, and early Linux adoption. This made him aware of the numerous pitfalls, challenges and actual fun of working in IT. In his career, Dim0 has worked for emerging technology organisations... Read More →
avatar for Kimberly Wilkins

Kimberly Wilkins

NoSQL Tech lead - MongoDB, Percona
Kimberly Wilkins is the MongoDB Technical Lead at Percona with 20+ years of experience managing and architecting databasesKimberly has been a Principal Engineer, a solutions architect, a manager, and a DBA. During those roles she has built out and managed expert database teams across... Read More →

Wednesday October 21, 2020 06:30 - 07:00 EDT