diff --git a/src/main/java/com/eactive/eai/rms/data/entity/onl/apim/obp/ObpGwMetricService.java b/src/main/java/com/eactive/eai/rms/data/entity/onl/apim/obp/ObpGwMetricService.java
index da1d6ef..4c2b803 100644
--- a/src/main/java/com/eactive/eai/rms/data/entity/onl/apim/obp/ObpGwMetricService.java
+++ b/src/main/java/com/eactive/eai/rms/data/entity/onl/apim/obp/ObpGwMetricService.java
@@ -2,6 +2,9 @@ package com.eactive.eai.rms.data.entity.onl.apim.obp;
 
 import com.eactive.apim.portal.obp.entity.ObpGwMetric;
 import com.eactive.apim.portal.obp.repository.ObpGwMetricRepository;
+import org.springframework.data.domain.PageRequest;
+import org.springframework.data.domain.Pageable;
+import org.springframework.data.domain.Sort;
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
 
@@ -50,6 +53,24 @@ public class ObpGwMetricService {
         return repository.findByTimesliceGreaterThanEqual(timeslice);
     }
 
+    /**
+     * 특정 시간대 이후의 GwMetric 데이터 조회 (row 수 제한)
+     *
+     * @param timeslice 조회 시작 시간대
+     * @param limit 최대 조회 건수 (0이면 무제한)
+     * @return 조회된 지표 목록 (timeslice ASC 정렬)
+     */
+    public List<ObpGwMetric> findByTimesliceGreaterThanEqual(LocalDateTime timeslice, int limit) {
+        if (limit <= 0) {
+            // 무제한 조회 (기존 동작 유지)
+            return repository.findByTimesliceGreaterThanEqual(timeslice);
+        } else {
+            // 제한적 조회 (timeslice ASC 정렬 + limit)
+            Pageable pageable = PageRequest.of(0, limit, Sort.by(Sort.Order.asc("timeslice")));
+            return repository.findByTimesliceGreaterThanEqual(timeslice, pageable);
+        }
+    }
+
     /**
      * 엔티티 저장 (INSERT 또는 UPDATE)
      */
diff --git a/src/main/java/com/eactive/eai/rms/onl/apim/obp/ObpGwMetricController.java b/src/main/java/com/eactive/eai/rms/onl/apim/obp/ObpGwMetricController.java
index 7acd524..5f93a4c 100644
--- a/src/main/java/com/eactive/eai/rms/onl/apim/obp/ObpGwMetricController.java
+++ b/src/main/java/com/eactive/eai/rms/onl/apim/obp/ObpGwMetricController.java
@@ -55,7 +55,7 @@ public class ObpGwMetricController extends BaseRestController {
         produces = JSON_CONTENT_TYPE
     )
     @ResponseBody
-    public String getGwMetricsAfterTimesliceV2(
+    public String getGwMetricsAfterTimeslice(
             @PathVariable("timeslice") String timeslice,
             @PathVariable("providerCode") String providerCode,
             @RequestParam(value = "pretty", required = false) Boolean pretty) {
diff --git a/src/main/java/com/eactive/eai/rms/onl/apim/obp/ObpGwMetricManService.java b/src/main/java/com/eactive/eai/rms/onl/apim/obp/ObpGwMetricManService.java
index 72e5c65..a815b2c 100644
--- a/src/main/java/com/eactive/eai/rms/onl/apim/obp/ObpGwMetricManService.java
+++ b/src/main/java/com/eactive/eai/rms/onl/apim/obp/ObpGwMetricManService.java
@@ -10,6 +10,7 @@ import com.eactive.eai.rms.common.util.CommonUtil;
 import com.eactive.eai.rms.data.entity.onl.apim.obp.ObpGwMetricJpaDAO;
 import com.eactive.eai.rms.data.entity.onl.apim.obp.ObpGwMetricService;
 import com.eactive.eai.rms.data.entity.onl.apim.obp.ObpGwMetricVO;
+import com.eactive.ext.kjb.common.KjbPropertyHolder;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 import org.springframework.dao.DataIntegrityViolationException;
@@ -314,12 +315,27 @@ public class ObpGwMetricManService extends BaseService {
     /**
      * 특정 시간대 이후의 GwMetric 데이터 조회 (REST API용)
      * after-timeslice 엔드포인트에서 사용
+     *
+     * <p>조회 범위 제한:</p>
+     * <ul>
+     *   <li>pageSize 값을 KjbProperty.apiGwMetricPageSize에서 읽어옴 (기본값: 10000)</li>
+     *   <li>0일 경우 무제한 조회</li>
+     *   <li>정렬: timeslice ASC (오래된 데이터부터 반환)</li>
+     * </ul>
      */
     public List<ObpGwMetricDTO> findByTimesliceAfter(LocalDateTime timeslice) {
         DataSourceContextHolder.setDataSourceType(
                 DataSourceTypeManager.getDataSourceType(DataSourceTypeManager.MONITORING));
 
-        List<ObpGwMetric> entities = obpGwMetricService.findByTimesliceGreaterThanEqual(timeslice);
+        // KjbProperty에서 pageSize 읽기
+        Integer pageSize = KjbPropertyHolder.get().getApiGwMetricPageSize();
+        if (pageSize == null) {
+            pageSize = 10000; // 기본값 (null 안전 처리)
+        }
+
+        // Service 호출 (limit 적용)
+        List<ObpGwMetric> entities = obpGwMetricService.findByTimesliceGreaterThanEqual(timeslice, pageSize);
+
         return entities.stream()
                 .map(ObpGwMetricDTO::from)
                 .collect(Collectors.toList());