Magnus Hagander 6b9e875f72 Track block level checksum failures in pg_stat_database
This adds a column that counts how many checksum failures have occurred
on files belonging to a specific database. Both checksum failures
during normal backend processing and those created when a base backup
detects a checksum failure are counted.

Author: Magnus Hagander
Reviewed by: Julien Rouhaud
2019-03-09 10:47:30 -08:00
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