diff options
Diffstat (limited to 'src/backend/access/nbtree/nbtree.c')
| -rw-r--r-- | src/backend/access/nbtree/nbtree.c | 18 |
1 files changed, 15 insertions, 3 deletions
diff --git a/src/backend/access/nbtree/nbtree.c b/src/backend/access/nbtree/nbtree.c index 8158508d8c5..6fca8e358fe 100644 --- a/src/backend/access/nbtree/nbtree.c +++ b/src/backend/access/nbtree/nbtree.c @@ -832,9 +832,6 @@ btvacuumcleanup(IndexVacuumInfo *info, IndexBulkDeleteResult *stats) btvacuumscan(info, stats, NULL, NULL, 0); } - /* Finally, vacuum the FSM */ - IndexFreeSpaceMapVacuum(info->index); - /* * It's quite possible for us to be fooled by concurrent page splits into * double-counting some index tuples, so disbelieve any total that exceeds @@ -976,6 +973,21 @@ btvacuumscan(IndexVacuumInfo *info, IndexBulkDeleteResult *stats, MemoryContextDelete(vstate.pagedelcontext); + /* + * If we found any recyclable pages (and recorded them in the FSM), then + * forcibly update the upper-level FSM pages to ensure that searchers can + * find them. It's possible that the pages were also found during + * previous scans and so this is a waste of time, but it's cheap enough + * relative to scanning the index that it shouldn't matter much, and + * making sure that free pages are available sooner not later seems + * worthwhile. + * + * Note that if no recyclable pages exist, we don't bother vacuuming the + * FSM at all. + */ + if (vstate.totFreePages > 0) + IndexFreeSpaceMapVacuum(rel); + /* update statistics */ stats->num_pages = num_pages; stats->pages_free = vstate.totFreePages; |