Commit76e5b4c

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Add C comment about the fact that the autovacuum limit can go backwards

by 3, but that is it OK.

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Original file line number	Diff line number	Diff line change
`@@ -1108,6 +1108,7 @@ do_start_worker(void)`
`1108`	`1108`	`recentXid=ReadNewTransactionId();`
`1109`	`1109`	`xidForceLimit=recentXid-autovacuum_freeze_max_age;`
`1110`	`1110`	`/* ensure it's a "normal" XID, else TransactionIdPrecedes misbehaves */`
	`1111`	`+/* this can cause the limit to go backwards by 3, but that's OK */`
`1111`	`1112`	`if (xidForceLimit<FirstNormalTransactionId)`
`1112`	`1113`	`xidForceLimit-=FirstNormalTransactionId;`
`1113`	`1114`

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