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Support huge pages on Windows

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Add support for huge pages (called large pages on Windows) to the
Windows build.

This (probably) breaks compatibility with Windows versions prior to
Windows 2003 or Windows Vista.

Authors: Takayuki Tsunakawa and Thomas Munro
Reviewed by: Magnus Hagander, Amit Kapila
This commit is contained in:
Magnus Hagander
2018-01-21 15:40:46 +01:00
parent 5c15a54e85
commit 1cc4f536ef
4 changed files with 204 additions and 22 deletions
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20
doc/src/sgml/config.sgml
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@@ -1369,14 +1369,26 @@ include_dir 'conf.d'
</para>
<para>
At present, this feature is supported only on Linux. The setting is
ignored on other systems when set to <literal>try</literal>.
At present, this feature is supported only on Linux and Windows. The
setting is ignored on other systems when set to <literal>try</literal>.
</para>
<para>
The use of huge pages results in smaller page tables and less CPU time
spent on memory management, increasing performance. For more details,
see <xref linkend="linux-huge-pages"/>.
spent on memory management, increasing performance. For more details about
using huge pages on Linux, see <xref linkend="linux-huge-pages"/>.
</para>
<para>
Huge pages are known as large pages on Windows. To use them, you need to
assign the user right Lock Pages in Memory to the Windows user account
that runs <productname>PostgreSQL</productname>.
You can use Windows Group Policy tool (gpedit.msc) to assign the user right
Lock Pages in Memory.
To start the database server on the command prompt as a standalone process,
not as a Windows service, the command prompt must be run as an administrator
User Access Control (UAC) must be disabled. When the UAC is enabled, the normal
command prompt revokes the user right Lock Pages in Memory when started.
</para>
<para>