diff options
| -rw-r--r-- | doc/src/sgml/release-9.2.sgml | 16 |
1 files changed, 3 insertions, 13 deletions
diff --git a/doc/src/sgml/release-9.2.sgml b/doc/src/sgml/release-9.2.sgml index fc477c84b0b..374ffb4599e 100644 --- a/doc/src/sgml/release-9.2.sgml +++ b/doc/src/sgml/release-9.2.sgml @@ -413,10 +413,11 @@ <para> This is often called "index-only scans" or "covering indexes". This is possible for heap pages with exclusively all-visible - tuples, as reported by the visibility map. + tuples, as reported by the visibility map. The visibility map was + made crash-safe as a necessary part of implementing this feature. </para> </listitem> - + <listitem> <para> Allow frequently uncontended locks to be recorded using a new @@ -541,17 +542,6 @@ <listitem> <para> - Make the visibility map crash-safe (Robert Haas, Noah Misch) - </para> - - <para> - This helps vacuum be more efficient, and is necessary for - index-only scans. - </para> - </listitem> - - <listitem> - <para> Improve PowerPC and Itanium spinlock performance (Manabu Ori, Tom Lane, Robert Haas) </para> |