From: Tatsuo Ishii <ishii@postgresql.org>
Date: Sat, 14 Jun 2025 11:54:13 +0000 (+0900)
Subject: Enhance lifecheck log.
X-Git-Url: http://git.postgresql.org/gitweb/%40%40?a=commitdiff_plain;p=pgpool2.git

Enhance lifecheck log.

Previously when wd_lifecheck_method = 'query', life checking prints
SQL without application name if "%a" is specified in
log_line_prefix. This commit add application_name "lifecheck_ping" to
make the log looks better.  Since this changes user visible behavior,
I do not apply this to stable branches.

Discussion: [pgpool-hackers: 4603] life check log is not nice
https://www.pgpool.net/pipermail/pgpool-hackers/2025-June/004604.html
---

diff --git a/src/watchdog/wd_lifecheck.c b/src/watchdog/wd_lifecheck.c
index c399128b4..ce99a4000 100644
--- a/src/watchdog/wd_lifecheck.c
+++ b/src/watchdog/wd_lifecheck.c
@@ -6,7 +6,7 @@
  * pgpool: a language independent connection pool server for PostgreSQL
  * written by Tatsuo Ishii
  *
- * Copyright (c) 2003-2022	PgPool Global Development Group
+ * Copyright (c) 2003-2025	PgPool Global Development Group
  *
  * Permission to use, copy, modify, and distribute this software and
  * its documentation for any purpose and without fee is hereby
@@ -943,13 +943,15 @@ create_conn(char *hostname, int port, char *password)
 	}
 
 	snprintf(conninfo, sizeof(conninfo),
-			 "host='%s' port='%d' dbname='%s' user='%s' password='%s' connect_timeout='%d'",
+			 "host='%s' port='%d' dbname='%s' user='%s' password='%s' connect_timeout='%d' application_name='%s'",
 			 hostname,
 			 port,
 			 pool_config->wd_lifecheck_dbname,
 			 pool_config->wd_lifecheck_user,
 			 password ? password : "",
-			 pool_config->wd_interval / 2 + 1);
+			 pool_config->wd_interval / 2 + 1,
+			 "lifecheck_ping");
+
 	conn = PQconnectdb(conninfo);
 
 	if (PQstatus(conn) != CONNECTION_OK)