When looking at the nearby suggestion to add deprecation comment for md5 in the .conf.sample, I happened to notice that autovacuum_worker_slots isn't commented out it the sample file.
AFAIK all GUCs in the sample file should be set to their defaults and left commented out. The attached does that for autovacuum_worker_slots and adds a trivial test to test_misc to catch it (and modifies the existing test which would've caught it). Or is there a case for leaving uncommented? -- Daniel Gustafsson
v1-0001-Make-sure-all-GUCs-in-.conf.sample-are-commented-.patch
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