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1 | 1 | <!-- |
2 | | -$PostgreSQL: pgsql/doc/src/sgml/ref/pg_dump.sgml,v 1.104 2008/08/21 22:25:44 momjian Exp $ |
| 2 | +$PostgreSQL: pgsql/doc/src/sgml/ref/pg_dump.sgml,v 1.105 2008/08/26 00:03:15 tgl Exp $ |
3 | 3 | PostgreSQL documentation |
4 | 4 | --> |
5 | 5 |
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@@ -538,9 +538,14 @@ PostgreSQL documentation |
538 | 538 | <term><option>--compress=<replaceable class="parameter">0..9</replaceable></option></term> |
539 | 539 | <listitem> |
540 | 540 | <para> |
541 | | - Specify the compression level to use in archive formats that |
542 | | - support compression. (Currently only the custom archive |
543 | | - format supports compression.) |
| 541 | + Specify the compression level to use. Zero means no compression. |
| 542 | + For the custom archive format, this specifies compression of |
| 543 | + individual table-data segments, and the default is to compress |
| 544 | + at a moderate level. |
| 545 | + For plain text output, setting a nonzero compression level causes |
| 546 | + the entire output file to be compressed, as though it had been |
| 547 | + fed through <application>gzip</>; but the default is not to compress. |
| 548 | + The tar archive format currently does not support compression at all. |
544 | 549 | </para> |
545 | 550 | </listitem> |
546 | 551 | </varlistentry> |
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