Michael, In my case, it only detected once. Does Postgre have any mechanism to correct the mapping file automatically? Regards, Tatsuki Sent from my ASUS -------- オリジナルのメッセージ -------- 送信元:Michael Paquier 送信済み:Fri, 26 Aug 2016 09:05:53 +0900 送信先:Tatsuki Kadomoto Cc:Kevin Grittner ,John R Pierce ,PostgreSQL mailing lists 件名:Re: incorrect checksum detected on "global/pg_filenode.map" when VACUUM FULL is executed On Thu, Aug 25, 2016 at 9:48 PM, Tatsuki Kadomoto <tatsuki.kadomoto@xxxxxxxxxxxxxxxxxxx> wrote: > Does this mean it's a kind of expected to face checksum error when the mapping file is relocated by VACUUM FULL? > I faced the checksum error exactly when VACUUM FULL was running and it has never been detected until now. No, it's not. This should not happen. And this means that your data folder is facing some corruption. -- Michael