Presented by:

David Wein is a Principal Software Engineer at Amazon Web Services where he works on RDS - Amazon’s Relational Database Service. David’s primary focus at AWS has been the development of Amazon Aurora PostgreSQL-compatible Edition. Prior to AWS, David was a Development Architect at SAP where he implemented persistence and recovery in the HANA in-memory database engine. David came to SAP from Sybase where he was a lead engineer on the Adaptive Server Enterprise database kernel and the in-memory store of Sybase IQ. He earned an M.S. in Interdisciplinary Telecommunications from the College of Engineering and Applied Science at the University of Colorado at Boulder.

PostgreSQL is a debt-based system that pays for fast writes on credit. It's up to vacuum to pay the bills before it's too late.

Vacuum remains one of the most challenging and mysterious aspects of PostgreSQL. Most users know the why of vacuum but are fuzzy on the how. This session will be a deep dive into the internals of vacuum, its algorithms, and includes a discussion of how vacuum uses resources and how you can tune your system for more efficient vacuuming. As part of the session we will review PostgreSQL's transaction clock, MVCC mechanism, and page layout.

2018 October 9 13:00
40 min
South Africa 2018
Operations and Administration