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Allow units to be specified with configuration settings.

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This commit is contained in:
Peter Eisentraut
2006-07-27 08:30:41 +00:00
parent a998a69247
commit b517e65348
8 changed files with 289 additions and 73 deletions
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8
doc/src/sgml/catalogs.sgml
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@ -1,4 +1,4 @@
<!-- $PostgreSQL: pgsql/doc/src/sgml/catalogs.sgml,v 2.127 2006/07/25 03:51:21 tgl Exp $ -->
<!-- $PostgreSQL: pgsql/doc/src/sgml/catalogs.sgml,v 2.128 2006/07/27 08:30:41 petere Exp $ -->
<!--
Documentation of the system catalogs, directed toward PostgreSQL developers
-->
@ -5482,6 +5482,12 @@
<entry></entry>
<entry>current value of the parameter</entry>
</row>
<row>
<entry><structfield>unit</structfield></entry>
<entry><type>text</type></entry>
<entry></entry>
<entry>implicit unit of the parameter</entry>
</row>
<row>
<entry><structfield>category</structfield></entry>
<entry><type>text</type></entry>

17
doc/src/sgml/config.sgml
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@ -1,4 +1,4 @@
<!-- $PostgreSQL: pgsql/doc/src/sgml/config.sgml,v 1.70 2006/07/26 11:35:55 petere Exp $ -->
<!-- $PostgreSQL: pgsql/doc/src/sgml/config.sgml,v 1.71 2006/07/27 08:30:41 petere Exp $ -->
<chapter Id="runtime-config">
<title>Server Configuration</title>
@ -28,6 +28,20 @@
(all case-insensitive) or any unambiguous prefix of these.
</para>
<para>
Some settings specify a memory or time value. Each of these has
an implicit unit, which is either kilobytes, blocks (typically 8
kilobytes), milliseconds, seconds, or minutes. For convenience, a
(possibly different) unit can also be specified explicitly. Valid
memory units are <literal>kB</literal> (kilobytes),
<literal>MB</literal> (megabytes), and <literal>GB</literal>
(gigabytes); valid time units are <literal>ms</literal>
(milliseconds), <literal>s</literal> (seconds),
<literal>min</literal> (minutes), <literal>h</literal> (hours),
and <literal>d</literal> (days). Note that the multiplier for
memory units in 1024, not 1000.
</para>
<para>
One way to set these parameters is to edit the file
<filename>postgresql.conf</><indexterm><primary>postgresql.conf</></>,
@ -39,6 +53,7 @@
log_connections = yes
log_destination = 'syslog'
search_path = '"$user", public'
shared_buffers = 128MB
</programlisting>
One parameter is specified per line. The equal sign between name and
value is optional. Whitespace is insignificant and blank lines are