Heikki is a long-time PostgreSQL developer and committer. He has worked on many parts of PostgreSQL backend, authoring features such as Two-Phase Commit and the new Free Space Map implementation in PostgreSQL 8.4.

Heikki has been employed by EnterpriseDB since 2006.

An introduction to PostgreSQL Write-Ahead-Log. What is the Write-Ahead-Log? How does WAL recovery work? What does its internal structure look like?