MVCC and Tuple Freezing through Pictures.
Tom in the General Manager for 2ndQuadrant in North America. He has been developing, deploying and supporting Database Systems and Enterprise Software for over 25 years. Tom had total product delivery ownership for the Progress OpenEdge platform which included a relational database deployed in thousands of systems and Enterprises all over the world. Tom was VP of Professional Services and later Vice President of products and engineering at EnterpriseDB. Responsibilities in his past include the management and maintenance of over 300 Postgres 24x7 database clusters. He has overseen the design and delivery of Postgres training solutions as well as the deployment of PostgreSQL at both Fortune 500 financial institutions and at military facilities all over the world. Teams he has managed have delivered major features that have become part of PostgreSQL. He overseen the design and and successful delivery of High Availability products for PostgreSQL and several other databases.
Andrew has been contributing to PostgreSQL since 2002 and has been a committer since 2005. He has contributed in a many areas, including configuration and logging enhancements, dollar quoting, CSV import and export, improvements to plperl, the Windows port, rewriting the initdb and pg_ctl scripts in C, parallel pg_restore and more recently JSON features and fast column addition. He created and maintains the PostgreSQL Buildfarm.
No video of the event yet, sorry!
Teams that deploy an insert or update intensive application with Postgres need to understand the topic of tuple freezing. In proper planning this important aspect of the Postgres MVCC architecture, can result in prolonged performance spike or an outage. Unfortunately, may people struggle with the concept of tuple freezing. Hence, DBAs and Developers become confused about how to design applications and how to tune Postgres with this critical concept in mind.
The general concepts around Postgres visibility rules and Postgres MVCC will be discussed and explained through pictures and animations. The talk will then dive into the topic of Tuple Freezing also with extensive use of diagrams and animations. Postgres internals concepts like the visibility map and the Freeze map will also be discussed and presented.
The primary purpose of this talk is help DBAs and developers understand gain detailed understanding around the concepts behind Postgres tuple freezing for the purpose of making informed decisions in application design, Postgres tuning and monitoring. The presenters will also illustrate some specific real life scenarios they have encountered.
- 50 min
- Postgres Conference 2020
- Ops and Administration