C_PSQL_PAR_APPEND(buf, buf_len, "sslmode", db->sslmode);
C_PSQL_PAR_APPEND(buf, buf_len, "krbsrvname", db->krbsrvname);
C_PSQL_PAR_APPEND(buf, buf_len, "service", db->service);
+ C_PSQL_PAR_APPEND(buf, buf_len, "application_name", "collectd_postgresql");
db->conn = PQconnectdb(conninfo);
db->proto_version = PQprotocolVersion(db->conn);