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postgres_fdw: Replace WAIT_EVENT_EXTENSION with custom wait events

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Three custom wait events are added here:
- "PostgresFdwCleanupResult", waiting while cleaning up PQgetResult() on
transaction abort.
- "PostgresFdwConnect", waiting to establish a connection to a remote
server.
- "PostgresFdwGetResult", waiting to receive a result from a remote
server.

Author: Masahiro Ikeda
Discussion: https://postgr.es/m/197bce267fa691a0ac62c86c4ab904c4@oss.nttdata.com
This commit is contained in:
Michael Paquier
2023-10-05 09:50:42 +09:00
parent 684d9bfdd5
commit d61f2538a3
2 changed files with 58 additions and 3 deletions
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38
doc/src/sgml/postgres-fdw.sgml
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@@ -1042,6 +1042,44 @@ postgres=# SELECT postgres_fdw_disconnect_all();
</para>
</sect2>
<sect2 id="postgres-fdw-wait-events">
<title>Wait Events</title>
<para>
<filename>postgres_fdw</filename> can report the following wait events
under the wait event type <literal>Extension</literal>:
</para>
<variablelist>
<varlistentry>
<term><literal>PostgresFdwCleanupResult</literal></term>
<listitem>
<para>
Waiting for transaction abort on remote server.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><literal>PostgresFdwConnect</literal></term>
<listitem>
<para>
Waiting to establish a connection to a remote server.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><literal>PostgresFdwGetResult</literal></term>
<listitem>
<para>
Waiting to receive the results of a query from a remote server.
</para>
</listitem>
</varlistentry>
</variablelist>
</sect2>
<sect2 id="postgres-fdw-configuration-parameters">
<title>Configuration Parameters</title>