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1 | | -<!-- $PostgreSQL: pgsql/doc/src/sgml/config.sgml,v 1.305 2010/08/19 22:55:00 tgl Exp $ --> |
| 1 | +<!-- $PostgreSQL: pgsql/doc/src/sgml/config.sgml,v 1.306 2010/08/22 02:37:32 momjian Exp $ --> |
2 | 2 |
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3 | 3 | <chapter Id="runtime-config"> |
4 | 4 | <title>Server Configuration</title> |
@@ -4150,7 +4150,8 @@ COPY postgres_log FROM '/full/path/to/logfile.csv' WITH csv; |
4150 | 4150 | <para> |
4151 | 4151 | Specifies the maximum age (in transactions) that a table's |
4152 | 4152 | <structname>pg_class</>.<structfield>relfrozenxid</> field can |
4153 | | - attain before a <command>VACUUM</> operation is forced to prevent |
| 4153 | + attain before a <command>VACUUM</> operation is forced to allow removal |
| 4154 | + of old files from the <filename>pg_clog</> subdirectory and prevent |
4154 | 4155 | transaction ID wraparound within the table. Note that the system |
4155 | 4156 | will launch autovacuum processes to prevent wraparound even when |
4156 | 4157 | autovacuum is otherwise disabled. |
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