On 2018-09-29, Andreas 'ads' Scherbaum wrote ...
> Answer:
> Under no circumstances must files in the pg_xlog/ directory be
removed, they are essential
> for the database operation. The files in this directory store the
transaction log, without
> these files the database can't recover after a crash or shutdown.
Those sentences use a fairly sophisticated/complex sentence structure.
As a simplified alternative, I suggest ...
Answer:
Do not remove any files from the pg_xlog directory. They store the
transaction log. Without
the transaction log, the database can't recover after a crash or
shutdown.