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Personally, whenever I build a new server for a new project I always enable TF4199 globally. The same applies when I upgrade existing instances to newer versions. The TF enables new fixes that would affect the behaviour of the application, but for new projects the risk of regression is not an issue. For instances upgraded from previous versions, the ...


Run ANALYZE after the index has been added. And make sure the column deprovision has statistics. How to verify? Basic statistics in pg_class: SELECT relname, relkind, reltuples, relpages FROM pg_class WHERE oid = 'schema_defs'::regclass; Data histograms per column in pg_stats (pg_statistics): SELECT attname, inherited, n_distinct, ...

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