Fsync Errors - PostgreSQL wiki

This article covers the current status, history, and OS and OS version differences relating to the circa 2018 fsync() reliability issues discussed on the PostgreSQL mailing list and elsewhere. It has sometimes been referred to as "fsyncgate 2018". Current status As of this PostgreSQL 12 commit, PostgreSQL will now PANIC on fsync() failure. It was backpatched to PostgreSQL 11, 10, 9.6, 9.5 and 9.4.

[nishitki]

“write-back error counter is initialised differently”