dee8002468
Checksum failure stats could be attributed to the wrong database in two cases: - when a read of a shared relation encountered a checksum error , it would be attributed to the current database, instead of the "database" representing shared relations - when using CREATE DATABASE ... STRATEGY WAL_LOG checksum errors in the source database would be attributed to the current database The checksum stats reporting via PageIsVerifiedExtended(PIV_REPORT_STAT) does not have access to the information about what database a page belongs to. This fixes the issue by removing PIV_REPORT_STAT and delegating the responsibility to report stats to the caller, which now can learn about the number of stats via a new optional argument. As this changes the signature of PageIsVerifiedExtended() and all callers should adapt to the new signature, use the occasion to rename the function to PageIsVerified() and remove the compatibility macro. We could instead have fixed this by adding information about the database to the args of PageIsVerified(), but there are soon-to-be-applied patches that need to separate the stats reporting from the PageIsVerified() call anyway. Those patches also include testing for the failure paths, something we inexplicably have not had. As there is no caller of pgstat_report_checksum_failure() left, remove it. It'd be possible, but awkward to fix this in the back branches. We considered doing the work not quite worth it, as mis-attributed stats should still elicit concern. The emitted error messages do allow to attribute the errors correctly. Discussion: https://postgr.es/m/5tyic6epvdlmd6eddgelv47syg2b5cpwffjam54axp25xyq2ga@ptwkinxqo3az Discussion: https://postgr.es/m/mglpvvbhighzuwudjxzu4br65qqcxsnyvio3nl4fbog3qknwhg@e4gt7npsohuz |
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PostgreSQL Database Management System
This directory contains the source code distribution of the PostgreSQL database management system.
PostgreSQL is an advanced object-relational database management system that supports an extended subset of the SQL standard, including transactions, foreign keys, subqueries, triggers, user-defined types and functions. This distribution also contains C language bindings.
Copyright and license information can be found in the file COPYRIGHT.
General documentation about this version of PostgreSQL can be found at https://www.postgresql.org/docs/devel/. In particular, information about building PostgreSQL from the source code can be found at https://www.postgresql.org/docs/devel/installation.html.
The latest version of this software, and related software, may be obtained at https://www.postgresql.org/download/. For more information look at our web site located at https://www.postgresql.org/.