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| author | Andres Freund <andres@anarazel.de> | 2020-08-12 17:04:51 -0700 |
|---|---|---|
| committer | Andres Freund <andres@anarazel.de> | 2020-08-12 17:04:51 -0700 |
| commit | b8443eae72b5c36e6b443a2f09b9c605c61a589d (patch) | |
| tree | 03eeb252b23aa4d689ac19d6104ea94913133530 /src | |
| parent | dc7420c2c9274a283779ec19718d2d16323640c0 (diff) | |
| download | postgresql-b8443eae72b5c36e6b443a2f09b9c605c61a589d.tar.gz postgresql-b8443eae72b5c36e6b443a2f09b9c605c61a589d.zip | |
Fix out-of-date version reference, grammar.
Time appears to be passing fast.
Reported-By: Peter Geoghegan <pg@bowt.ie>
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 |