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pg_buffercache: document column meanings

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Improve documentation for usagecount and relforknumber.
Backpatch to 9.3.
Suggestion from Satoshi Nagayasu
This commit is contained in:
Bruce Momjian 2013-07-03 14:19:44 -04:00
parent f33c53ec5b
commit f71939cd1a
1 changed files with 3 additions and 2 deletions
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doc/src/sgml/pgbuffercache.sgml
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@ -84,7 +84,8 @@
<entry><structfield>relforknumber</structfield></entry>
<entry><type>smallint</type></entry>
<entry></entry>
<entry>Fork number within the relation</entry>
<entry>Fork number within the relation; see
<filename>include/storage/relfilenode.h</></entry>
</row>
<row>
@ -98,7 +99,7 @@
<entry><structfield>usagecount</structfield></entry>
<entry><type>smallint</type></entry>
<entry></entry>
<entry>Page LRU count</entry>
<entry>Clock-sweep access count</entry>
</row>
</tbody>