diff options
Diffstat (limited to 'src/backend/access/heap/heapam.c')
| -rw-r--r-- | src/backend/access/heap/heapam.c | 15 |
1 files changed, 8 insertions, 7 deletions
diff --git a/src/backend/access/heap/heapam.c b/src/backend/access/heap/heapam.c index caacc105d25..208457584d9 100644 --- a/src/backend/access/heap/heapam.c +++ b/src/backend/access/heap/heapam.c @@ -7479,10 +7479,11 @@ heap_xlog_visible(XLogReaderState *record) { /* * We don't bump the LSN of the heap page when setting the visibility - * map bit (unless checksums are enabled, in which case we must), - * because that would generate an unworkable volume of full-page - * writes. This exposes us to torn page hazards, but since we're not - * inspecting the existing page contents in any way, we don't care. + * map bit (unless checksums or wal_hint_bits is enabled, in which + * case we must), because that would generate an unworkable volume of + * full-page writes. This exposes us to torn page hazards, but since + * we're not inspecting the existing page contents in any way, we + * don't care. * * However, all operations that clear the visibility map bit *do* bump * the LSN, and those operations will only be replayed if the XLOG LSN @@ -7497,10 +7498,10 @@ heap_xlog_visible(XLogReaderState *record) else if (action == BLK_RESTORED) { /* - * If heap block was backed up, restore it. This can only happen with - * checksums enabled. + * If heap block was backed up, we already restored it and there's + * nothing more to do. (This can only happen with checksums or + * wal_log_hints enabled.) */ - Assert(DataChecksumsEnabled()); } if (BufferIsValid(buffer)) UnlockReleaseBuffer(buffer); |