=== 0d-① 문장 로깅을 켠다 ===
ALTER SYSTEM
ALTER SYSTEM
 pg_reload_conf 
----------------
 t
(1 row)

=== 0d-② 적용됐는지 읽는다 ===
 log_statement 
---------------
 all
(1 row)

 log_line_prefix 
-----------------
 %m [%p] %h 
(1 row)

K0=10.42.1.7 K1=10.42.0.13
=== 0d-③ 로그인 한 번 · 반대편에서 refresh 한 번 ===
SID=wITYiY7I4t8Ovy9wzwM1ewOA
REFRESH_ON_K1=200
=== 반대편 노드가 날린 문장만 ===
2026-09-17 04:47:30.547 UTC [916] 10.42.0.13 LOG:  execute <unnamed>: SELECT address, name, ip, coord, coordinated_by, last_update FROM JGROUPS_PING WHERE cluster_name=$1
=== 그 sid 가 들어간 줄만 120자씩 ===
2026-09-17 04:47:31.285 UTC [948] 10.42.1.7 DETAIL:  parameters: $1 = '0', $2 = 'wITYiY7I4t8Ovy9wzwM1ewOA'
2026-09-17 04:47:31.288 UTC [948] 10.42.1.7 DETAIL:  parameters: $1 = '2d7893fb-6003-4f0e-b6a8-d6e7e9e8fa25', $2 = 'loca
2026-09-17 04:47:31.294 UTC [948] 10.42.1.7 DETAIL:  parameters: $1 = '0', $2 = 'wITYiY7I4t8Ovy9wzwM1ewOA'
2026-09-17 04:47:31.295 UTC [948] 10.42.1.7 DETAIL:  parameters: $1 = '2d7893fb-6003-4f0e-b6a8-d6e7e9e8fa25', $2 = 'loca
2026-09-17 04:47:31.296 UTC [948] 10.42.1.7 DETAIL:  parameters: $1 = NULL, $2 = '1789620451', $3 = '{"ipAddress":"10.42
2026-09-17 04:47:31.296 UTC [948] 10.42.1.7 DETAIL:  parameters: $1 = '{"authMethod":"openid-connect","notes":{"clientId
