Guten Tag Guy Burgess, am Donnerstag, 11. Februar 2021 um 01:21 schrieben Sie: > What appears to be happening is the affected WAL files (which is > usually only 2 or 3 WAL files at a time) are somehow "losing" their > NTFS permissions, so the PG process can't rename them - though of > course the PG process created them. Even running icacls as admin > gives "Access is denied" on those files. A further oddity is the > affected files do end up disappearing after a while. If you see that somewhat frequently, use Process Monitor and Process Explorer to see who accesses those files how. ProcExp easily allows you to find all open handles per file. If it's not AV, it might be something like Windows Search Indexer as well, if that is enabled by default in Server 2019 at all. Though, even with my Windows 10 and Search Indexer enabled I didn't run into such problems yet. And especially when rewriting large parts of my databases with lots of created WAL files, I see the Indexer working on those files, but NOT conflicting with Postgres yet. The behaviour you describe happens exactly when two processes e.g. concurrently hold HANDLEs on the same file and one of those deletes the file then. Windows keeps file names until all open HANDLEs are closed and depending on how those HANDLEs have been opened by the first app, concurrent deletion is perferctly fine for Windows. Though, a such deleted file can't be opened easily anymore and looks like it has lost permissions only. But that's not the case, it's deleted already. It might be that this happens for Postgres to itself somehow when some other app has an open HANDLE. I don't think that some other app is deleting that file by purpose instead, reading it for some reason seems more likely to me. > dwShareMode > FILE_SHARE_DELETE > Enables subsequent open operations on a file or device to request > delete access. Otherwise, other processes cannot open the file or > device if they request delete access. https://docs.microsoft.com/en-us/windows/win32/api/fileapi/nf-fileapi-createfilew Mit freundlichen Grüßen Thorsten Schöning -- Thorsten Schöning AM-SoFT IT-Service - Bitstore Hameln GmbH i.G. ist ein Mitglied der Bitstore Gruppe - Ihr Full-Service-Dienstleister für IT und TK E-Mail: Thorsten.Schoening@xxxxxxxxxx Web: http://www.AM-SoFT.de/ Telefon: 05151- 9468- 0 Telefon: 05151- 9468-55 Fax: 05151- 9468-88 Mobil: 0178-8 9468-04 AM-SoFT IT-Service - Bitstore Hameln GmbH i.G., Brandenburger Str. 7c, 31789 Hameln AG Hannover HRB neu - Geschäftsführer: Janine Galonska Für Rückfragen stehe ich Ihnen sehr gerne zur Verfügung. Mit freundlichen Grüßen Thorsten Schöning Tel: 05151 9468 0 Fax: 05151 9468 88 Mobil: Webseite: https://www.am-soft.de AM-Soft IT-Service - Bitstore Hameln GmbH i.G. ist ein Mitglied der Bitstore Gruppe - Ihr Full-Service-Dienstleister für IT und TK AM-Soft IT-Service - Bitstore Hameln GmbH i.G. Brandenburger Str. 7c 31789 Hameln Tel: 05151 9468 0 Bitstore IT-Consulting GmbH Zentrale - Berlin Lichtenberg Frankfurter Allee 285 10317 Berlin Tel: 030 453 087 80 CBS IT-Service - Bitstore Kaulsdorf UG Tel: 030 453 087 880 1 Büro Dallgow-Döberitz Tel: 03322 507 020 Büro Kloster Lehnin Tel: 033207 566 530 PCE IT-Service - Bitstore Darmstadt UG Darmstadt Tel: 06151 392 973 0 Büro Neuruppin Tel: 033932 606 090 ACI EDV Systemhaus Dresden GmbH Dresden Tel: 0351 254 410 Das Systemhaus - Bitstore Magdeburg GmbH Magdeburg Tel: 0391 636 651 0 Allerdata.IT - Bitstore Wittenberg GmbH Wittenberg Tel: 03491 876 735 7 Büro Liebenwalde Tel: 033054 810 00 HSA - das Büro - Bitstore Altenburg UG Altenburg Tel: 0344 784 390 97 Bitstore IT – Consulting GmbH NL Piesteritz Piesteritz Tel: 03491 644 868 6 Solltec IT-Services - Bitstore Braunschweig UG Braunschweig Tel: 0531 206 068 0 MF Computer Service - Bitstore Gütersloh GmbH Gütersloh Tel: 05245 920 809 3 Firmensitz: MF Computer Service - Bitstore Gütersloh GmbH, Gildestraße 25, 33442 Herzebrock-Clarholz Geschäftsführer Janine Galonska
