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| author | Simon Riggs <simon@2ndQuadrant.com> | 2013-03-19 08:51:35 +0000 |
|---|---|---|
| committer | Simon Riggs <simon@2ndQuadrant.com> | 2013-03-19 08:51:35 +0000 |
| commit | 8c3b87ca10a54daf06e41986d763e12538c06ab9 (patch) | |
| tree | 3d0899565e5721f7dbf8ffbc496f93d038ee1ac2 /doc/src | |
| parent | 2266db392cb825eccb39518e7b652e7f336fff6c (diff) | |
| download | postgresql-8c3b87ca10a54daf06e41986d763e12538c06ab9.tar.gz postgresql-8c3b87ca10a54daf06e41986d763e12538c06ab9.zip | |
Correction that 2pc state files use CRC-32.
Jeff Davis
Diffstat (limited to 'doc/src')
| -rw-r--r-- | doc/src/sgml/wal.sgml | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/doc/src/sgml/wal.sgml b/doc/src/sgml/wal.sgml index bf1f7b1fca7..e96f0ce17d5 100644 --- a/doc/src/sgml/wal.sgml +++ b/doc/src/sgml/wal.sgml @@ -200,7 +200,7 @@ <listitem> <para> Internal data structures such as pg_clog, pg_subtrans, pg_multixact, - pg_serial, pg_notify, pg_stat, pg_snapshots, pg_twophase are not directly + pg_serial, pg_notify, pg_stat, pg_snapshots are not directly checksummed, nor are pages protected by full page writes. However, where such data structures are persistent, WAL records are written that allow recent changes to be accurately rebuilt at crash recovery and those @@ -209,6 +209,11 @@ </listitem> <listitem> <para> + Individual state files in pg_twophase are protected by CRC-32. + </para> + </listitem> + <listitem> + <para> Temporary data files used in larger SQL queries for sorts, materializations and intermediate results are not currently checksummed, nor will WAL records be written for changes to those files. |