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Adjust lazy_scan_heap() accounting comments.

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Explain which particular LP_DEAD line pointers get accounted for by the
tups_vacuumed variable.
This commit is contained in:
Peter Geoghegan
2021-02-14 19:28:37 -08:00
parent f900a79ecd
commit 7cde6b13a9
2 changed files with 12 additions and 11 deletions
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5
src/backend/access/heap/pruneheap.c
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@ -213,11 +213,12 @@ heap_page_prune_opt(Relation relation, Buffer buffer)
* send its own new total to pgstats, and we don't want this delta applied
* on top of that.)
*
* Sets latestRemovedXid for caller on return.
*
* off_loc is the offset location required by the caller to use in error
* callback.
*
* Returns the number of tuples deleted from the page and sets
* latestRemovedXid.
* Returns the number of tuples deleted from the page during this call.
*/
int
heap_page_prune(Relation relation, Buffer buffer,