diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/backend/access/nbtree/README | 2 | ||||
| -rw-r--r-- | src/backend/access/transam/README | 2 |
2 files changed, 2 insertions, 2 deletions
diff --git a/src/backend/access/nbtree/README b/src/backend/access/nbtree/README index 781a8f1932d..9692e4cdf64 100644 --- a/src/backend/access/nbtree/README +++ b/src/backend/access/nbtree/README @@ -412,7 +412,7 @@ the cost of walking down the tree in such common cases. The optimization works on the assumption that there can only be one non-ignorable leaf rightmost page, and so not even a visible-to-everyone -style interlock required. We cannot fail to detect that our hint was +style interlock is required. We cannot fail to detect that our hint was invalidated, because there can only be one such page in the B-Tree at any time. It's possible that the page will be deleted and recycled without a backend's cached page also being detected as invalidated, but diff --git a/src/backend/access/transam/README b/src/backend/access/transam/README index 6f44ae9ce6a..98acb429b67 100644 --- a/src/backend/access/transam/README +++ b/src/backend/access/transam/README @@ -318,7 +318,7 @@ XID less than this could be about to appear in the ProcArray, because of the XidGenLock interlock discussed above.) As GetSnapshotData is performance critical, it does not perform an accurate -oldest-xmin calculation (it used to, until v13). The contents of a snapshot +oldest-xmin calculation (it used to, until v14). The contents of a snapshot only depend on the xids of other backends, not their xmin. As backend's xmin changes much more often than its xid, having GetSnapshotData look at xmins can lead to a lot of unnecessary cacheline ping-pong. Instead |