diff --git a/docs/en/changes/changes.md b/docs/en/changes/changes.md
index 9ecf7854a918..731e027fcd17 100644
--- a/docs/en/changes/changes.md
+++ b/docs/en/changes/changes.md
@@ -14,6 +14,8 @@
 * Support trace MQE query for debugging.
 * Add Component ID(158) for the Solon framework.
 * Fix metrics tag in HTTP handler of browser receiver plugin.
+* Increase `alarm_record#message` column length to 2000 from 200.
+* Remove `alarm_record#message` column indexing.
 
 #### UI
 
diff --git a/oap-server/server-core/src/main/java/org/apache/skywalking/oap/server/core/analysis/metrics/Event.java b/oap-server/server-core/src/main/java/org/apache/skywalking/oap/server/core/analysis/metrics/Event.java
index 73ad0e27f660..c3598698ee1b 100644
--- a/oap-server/server-core/src/main/java/org/apache/skywalking/oap/server/core/analysis/metrics/Event.java
+++ b/oap-server/server-core/src/main/java/org/apache/skywalking/oap/server/core/analysis/metrics/Event.java
@@ -100,7 +100,7 @@ protected StorageID id0() {
     @Column(name = TYPE)
     private String type;
 
-    @Column(name = MESSAGE)
+    @Column(name = MESSAGE, storageOnly = true, length = 2000)
     private String message;
 
     @Column(name = PARAMETERS, storageOnly = true, length = PARAMETER_MAX_LENGTH)