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Revert "Avoid creation of the free space map for small heap relations."

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This reverts commit ac88d2962a.
This commit is contained in:
Amit Kapila
2019-01-28 11:31:44 +05:30
parent ac88d2962a
commit a23676503b
16 changed files with 102 additions and 576 deletions
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13
doc/src/sgml/storage.sgml
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@ -590,13 +590,12 @@ tuple would otherwise be too big.
<indexterm><primary>FSM</primary><see>Free Space Map</see></indexterm>
<para>
Each heap relation, unless it is very small, and each index relation, except
for hash indexes, has a Free Space Map (FSM) to keep track of available
space in the relation. It's stored alongside the main relation data in a
separate relation fork, named after the filenode number of the relation, plus
a <literal>_fsm</literal> suffix. For example, if the filenode of a relation
is 12345, the FSM is stored in a file called <filename>12345_fsm</filename>,
in the same directory as the main relation file.
Each heap and index relation, except for hash indexes, has a Free Space Map
(FSM) to keep track of available space in the relation. It's stored
alongside the main relation data in a separate relation fork, named after the
filenode number of the relation, plus a <literal>_fsm</literal> suffix. For example,
if the filenode of a relation is 12345, the FSM is stored in a file called
<filename>12345_fsm</filename>, in the same directory as the main relation file.
</para>
<para>