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| author | Bruce Momjian <bruce@momjian.us> | 2012-05-10 16:50:34 -0400 |
|---|---|---|
| committer | Bruce Momjian <bruce@momjian.us> | 2012-05-10 16:50:46 -0400 |
| commit | 5428ff4af84e488c7f0629108cd12ff51125e09f (patch) | |
| tree | 4ee76790e304061ebe74322292f41145d4892c7d | |
| parent | f40022f1adaeff85b01d98fea38cf5aa16814aa7 (diff) | |
| download | postgresql-5428ff4af84e488c7f0629108cd12ff51125e09f.tar.gz postgresql-5428ff4af84e488c7f0629108cd12ff51125e09f.zip | |
Merge visibility map crash-safety into index-only scan release note
item, per Robert Haas.
| -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> |