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1 | | -<!-- $PostgreSQL: pgsql/doc/src/sgml/config.sgml,v 1.225 2009/09/08 17:08:36 tgl Exp $ --> |
| 1 | +<!-- $PostgreSQL: pgsql/doc/src/sgml/config.sgml,v 1.226 2009/09/10 15:02:46 alvherre Exp $ --> |
2 | 2 |
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3 | 3 | <chapter Id="runtime-config"> |
4 | 4 | <title>Server Configuration</title> |
@@ -2422,6 +2422,19 @@ local0.* /var/log/postgresql |
2422 | 2422 | is dynamic-linker failure messages). |
2423 | 2423 | This parameter can only be set at server start. |
2424 | 2424 | </para> |
| 2425 | + |
| 2426 | + <note> |
| 2427 | + <para> |
| 2428 | + The logging collector is designed to never lose messages. This means |
| 2429 | + that in case of extremely high load, server processes could be |
| 2430 | + blocked due to trying to send additional log messages when the |
| 2431 | + collector has fallen behind. In contrast, <application>syslog</> |
| 2432 | + prefers to drop messages if it cannot write them, which means it's |
| 2433 | + less reliable in those cases but it will not block the rest of the |
| 2434 | + system. |
| 2435 | + </para> |
| 2436 | + </note> |
| 2437 | + |
2425 | 2438 | </listitem> |
2426 | 2439 | </varlistentry> |
2427 | 2440 |
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