On Tue, Apr 11, 2023 at 04:44:54PM +0000, Evgeny Morozov wrote: > We have data_checksums=on. (It must be on by default, since I cannot > find that in our config files anywhere.) initdb does not enable checksums by default, requiring a -k/--data-checksums, so likely this addition comes from from your environment. > However, the docs say "Only > data pages are protected by checksums; internal data structures and > temporary files are not.", so I guess pg_class_oid_index might be an > "internal data structure"? pg_class_oid_index is a btree index that relies on 8k on-disk pages (default size), so it is subject to the same rules as normal relations regarding checksums for the pages flushed to disk, even if it is on a catalog. -- Michael
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