diff --git a/oap-server/server-core/src/main/java/org/apache/skywalking/oap/server/core/analysis/meter/function/AvgFunction.java b/oap-server/server-core/src/main/java/org/apache/skywalking/oap/server/core/analysis/meter/function/AvgFunction.java
index 173de197b..4263221aa 100644
--- a/oap-server/server-core/src/main/java/org/apache/skywalking/oap/server/core/analysis/meter/function/AvgFunction.java
+++ b/oap-server/server-core/src/main/java/org/apache/skywalking/oap/server/core/analysis/meter/function/AvgFunction.java
@@ -46,7 +46,7 @@ public abstract class AvgFunction extends Metrics implements AcceptableValue<Lon
 
     @Setter
     @Getter
-    @Column(columnName = ENTITY_ID)
+    @Column(columnName = ENTITY_ID, length = 512)
     private String entityId;
 
     /**
diff --git a/oap-server/server-core/src/main/java/org/apache/skywalking/oap/server/core/analysis/meter/function/AvgHistogramFunction.java b/oap-server/server-core/src/main/java/org/apache/skywalking/oap/server/core/analysis/meter/function/AvgHistogramFunction.java
index 1d7b343c8..22985cfc1 100644
--- a/oap-server/server-core/src/main/java/org/apache/skywalking/oap/server/core/analysis/meter/function/AvgHistogramFunction.java
+++ b/oap-server/server-core/src/main/java/org/apache/skywalking/oap/server/core/analysis/meter/function/AvgHistogramFunction.java
@@ -57,7 +57,7 @@ public abstract class AvgHistogramFunction extends Metrics implements Acceptable
 
     @Setter
     @Getter
-    @Column(columnName = ENTITY_ID)
+    @Column(columnName = ENTITY_ID, length = 512)
     private String entityId;
     @Getter
     @Setter
diff --git a/oap-server/server-core/src/main/java/org/apache/skywalking/oap/server/core/analysis/meter/function/HistogramFunction.java b/oap-server/server-core/src/main/java/org/apache/skywalking/oap/server/core/analysis/meter/function/HistogramFunction.java
index 92cb79897..c6edef52c 100644
--- a/oap-server/server-core/src/main/java/org/apache/skywalking/oap/server/core/analysis/meter/function/HistogramFunction.java
+++ b/oap-server/server-core/src/main/java/org/apache/skywalking/oap/server/core/analysis/meter/function/HistogramFunction.java
@@ -47,7 +47,7 @@ public abstract class HistogramFunction extends Metrics implements AcceptableVal
 
     @Setter
     @Getter
-    @Column(columnName = ENTITY_ID)
+    @Column(columnName = ENTITY_ID, length = 512)
     private String entityId;
     @Getter
     @Setter
diff --git a/oap-server/server-core/src/main/java/org/apache/skywalking/oap/server/core/analysis/meter/function/PercentileFunction.java b/oap-server/server-core/src/main/java/org/apache/skywalking/oap/server/core/analysis/meter/function/PercentileFunction.java
index 5681c2432..8bfc782c3 100644
--- a/oap-server/server-core/src/main/java/org/apache/skywalking/oap/server/core/analysis/meter/function/PercentileFunction.java
+++ b/oap-server/server-core/src/main/java/org/apache/skywalking/oap/server/core/analysis/meter/function/PercentileFunction.java
@@ -54,7 +54,7 @@ public abstract class PercentileFunction extends Metrics implements AcceptableVa
 
     @Setter
     @Getter
-    @Column(columnName = ENTITY_ID)
+    @Column(columnName = ENTITY_ID, length = 512)
     private String entityId;
     @Getter
     @Setter