On Tue, 2024-12-17 at 19:11 +0530, Rama Krishnan wrote: > One of their main concerns is whether the database will allow `INSERT` queries > when the `pg_wal` directory becomes full. > > As I understand, once the `pg_wal` directory is completely filled, the database > will allow only read queries and will not permit any write operations. That is not the case. If pg_wal fills up (more precisely: if creating a new file in pg_wal fails), PostgreSQL will crash and go down. Yours, Laurenz Albe