diff --git a/rush-config/src/main/resources/config/application.yml b/rush-config/src/main/resources/config/application.yml
index 0dd9e46..48f3998 100644
--- a/rush-config/src/main/resources/config/application.yml
+++ b/rush-config/src/main/resources/config/application.yml
@@ -3,8 +3,14 @@ eureka:
   client:
     service-url:
       defaultZone: ${EUREKA_URL:http://localhost:8761/eureka}
+    registry-fetch-interval-seconds: 5
+    healthcheck:
+      enabled: true
   instance:
     prefer-ip-address: true
+    instance-id: ${spring.application.name}:${random.uuid}
+    lease-renewal-interval-in-seconds: 10
+    lease-expiration-duration-in-seconds: 30
 
 management:
   endpoints:
diff --git a/rush-eureka/README.md b/rush-eureka/README.md
index 341c2db..343e896 100644
--- a/rush-eureka/README.md
+++ b/rush-eureka/README.md
@@ -4,6 +4,10 @@ Eureka 서비스 레지스트리. Spring 서비스들이 여기에 등록되고,
 
 대시보드: http://localhost:8761
 
+- 서비스는 10초마다 하트비트를 보내고, 30초 동안 없으면 5초 주기 정리 작업에서 빠집니다.
+- 서비스가 정상 종료하면 바로 등록이 해제됩니다. 응답 없이 죽으면 하트비트 만료와 게이트웨이 목록 갱신(5초)·캐시(5초)를 거쳐 1분 안에 라우팅에서 빠집니다.
+- 자기 보존 모드는 로컬에서 꺼 둡니다. 운영에서는 `EUREKA_SELF_PRESERVATION=true`로 켭니다.
+
 ## 실행
 
 ```bash
diff --git a/rush-eureka/src/main/resources/application.yml b/rush-eureka/src/main/resources/application.yml
index 2ac2960..1a68ab0 100644
--- a/rush-eureka/src/main/resources/application.yml
+++ b/rush-eureka/src/main/resources/application.yml
@@ -11,7 +11,10 @@ eureka:
     register-with-eureka: false
     fetch-registry: false
   server:
-    enable-self-preservation: false
+    enable-self-preservation: ${EUREKA_SELF_PRESERVATION:false}
+    eviction-interval-timer-in-ms: 5000
+    response-cache-update-interval-ms: 5000
+    wait-time-in-ms-when-sync-empty: 0
 
 management:
   endpoints:
diff --git a/rush-gateway/src/main/resources/application.yml b/rush-gateway/src/main/resources/application.yml
index e88a912..66951c8 100644
--- a/rush-gateway/src/main/resources/application.yml
+++ b/rush-gateway/src/main/resources/application.yml
@@ -7,6 +7,9 @@ spring:
   config:
     import: optional:configserver:${CONFIG_URL:http://localhost:8888}
   cloud:
+    loadbalancer:
+      cache:
+        ttl: 5s
     gateway:
       server:
         webflux: