[Bugfix]分批从ES查询Topic最近一条指标(#817)

km-common/src/main/java/com/xiaojukeji/know/streaming/km/common/constant/ESConstant.java

@@ -36,6 +36,11 @@ public class ESConstant {
 
     public static final Integer DEFAULT_RETRY_TIME = 3;
 
+    /**
+     * 获取Topic-Latest指标时，单次允许的Topic数
+     */
+    public static final int SEARCH_LATEST_TOPIC_METRIC_CNT_PER_REQUEST = 500;
+
     private ESConstant() {
     }
 }