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Install infrastructure for shared-memory free space map. Doesn't actually

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do anything yet, but it has the necessary connections to initialization
and so forth.  Make some gestures towards allowing number of blocks in
a relation to be BlockNumber, ie, unsigned int, rather than signed int.
(I doubt I got all the places that are sloppy about it, yet.)  On the
way, replace the hardwired NLOCKS_PER_XACT fudge factor with a GUC
variable.
This commit is contained in:
Tom Lane
2001-06-27 23:31:40 +00:00
parent b559382134
commit e0c9301c87
26 changed files with 572 additions and 316 deletions
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38
doc/src/sgml/runtime.sgml
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@ -1,5 +1,5 @@
<!--
$Header: /cvsroot/pgsql/doc/src/sgml/runtime.sgml,v 1.69 2001/06/23 00:03:10 petere Exp $
$Header: /cvsroot/pgsql/doc/src/sgml/runtime.sgml,v 1.70 2001/06/27 23:31:37 tgl Exp $
-->
<Chapter Id="runtime">
@ -1131,6 +1131,42 @@ dynamic_library_path = '/usr/local/lib:/home/my_project/lib:$libdir:$libdir/cont
</listitem>
</varlistentry>
<varlistentry>
<term>MAX_FSM_RELATIONS (<type>integer</type>)</term>
<listitem>
<para>
Sets the maximum number of relations (tables) for which free space
will be tracked in the shared free-space map.
The default is 100. This option can only be set at server start.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>MAX_FSM_PAGES (<type>integer</type>)</term>
<listitem>
<para>
Sets the maximum number of disk pages for which free space
will be tracked in the shared free-space map.
The default is 10000. This option can only be set at server start.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>MAX_LOCKS_PER_XACT (<type>integer</type>)</term>
<listitem>
<para>
The shared lock table is sized on the assumption that at most
max_locks_per_xact * max_connections distinct objects will need
to be locked at any one time. The default, 64, has historically
proven sufficient, but you might need to raise this value if you
have clients that touch many different tables in a single transaction.
This option can only be set at server start.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>PORT (<type>integer</type>)</term>
<listitem>