diff --git a/application/src/main/resources/thingsboard.yml b/application/src/main/resources/thingsboard.yml
index 381ebb5b93..deb57b3d73 100644
--- a/application/src/main/resources/thingsboard.yml
+++ b/application/src/main/resources/thingsboard.yml
@@ -166,6 +166,8 @@ cassandra:
     ts_key_value_partitioning: "${TS_KV_PARTITIONING:MONTHS}"
     ts_key_value_ttl: "${TS_KV_TTL:0}"
     events_ttl: "${TS_EVENTS_TTL:0}"
+    # Specify TTL of debug log in seconds. The current value corresponds to one week
+    debug_events_ttl: "${DEBUG_EVENTS_TTL:604800}"
     buffer_size: "${CASSANDRA_QUERY_BUFFER_SIZE:200000}"
     concurrent_limit: "${CASSANDRA_QUERY_CONCURRENT_LIMIT:1000}"
     permit_max_wait_time: "${PERMIT_MAX_WAIT_TIME:120000}"
diff --git a/dao/src/main/java/org/thingsboard/server/dao/event/CassandraBaseEventDao.java b/dao/src/main/java/org/thingsboard/server/dao/event/CassandraBaseEventDao.java
index 1273df4f51..b2682ab2e2 100644
--- a/dao/src/main/java/org/thingsboard/server/dao/event/CassandraBaseEventDao.java
+++ b/dao/src/main/java/org/thingsboard/server/dao/event/CassandraBaseEventDao.java
@@ -26,6 +26,7 @@ import lombok.extern.slf4j.Slf4j;
 import org.apache.commons.lang3.StringUtils;
 import org.springframework.beans.factory.annotation.Value;
 import org.springframework.stereotype.Component;
+import org.thingsboard.server.common.data.DataConstants;
 import org.thingsboard.server.common.data.Event;
 import org.thingsboard.server.common.data.id.EntityId;
 import org.thingsboard.server.common.data.id.EventId;
@@ -69,6 +70,9 @@ public class CassandraBaseEventDao extends CassandraAbstractSearchTimeDao<EventE
     @Value("${cassandra.query.events_ttl:0}")
     private int eventsTtl;
 
+    @Value("${cassandra.query.debug_events_ttl}")
+    private int debugEventsTtl;
+
     @Override
     public Event save(TenantId tenantId, Event event) {
         try {
@@ -188,11 +192,15 @@ public class CassandraBaseEventDao extends CassandraAbstractSearchTimeDao<EventE
                 .value(ModelConstants.EVENT_TYPE_PROPERTY, entity.getEventType())
                 .value(ModelConstants.EVENT_UID_PROPERTY, entity.getEventUid())
                 .value(ModelConstants.EVENT_BODY_PROPERTY, entity.getBody());
+
         if (ifNotExists) {
             insert = insert.ifNotExists();
         }
-        if(ttl > 0){
-            insert.using(ttl(ttl));
+
+        int selectedTtl = entity.getEventType().equals(DataConstants.DEBUG_RULE_NODE) ? debugEventsTtl : ttl;
+
+        if(selectedTtl > 0){
+            insert.using(ttl(selectedTtl));
         }
         ResultSetFuture resultSetFuture = executeAsyncWrite(tenantId, insert);
         return Futures.transform(resultSetFuture, rs -> {
diff --git a/dao/src/test/resources/cassandra-test.properties b/dao/src/test/resources/cassandra-test.properties
index 151688c41c..af9a4b356f 100644
--- a/dao/src/test/resources/cassandra-test.properties
+++ b/dao/src/test/resources/cassandra-test.properties
@@ -48,6 +48,8 @@ cassandra.query.ts_key_value_partitioning=HOURS
 
 cassandra.query.ts_key_value_ttl=0
 
+cassandra.query.debug_events_ttl=604800
+
 cassandra.query.max_limit_per_request=1000
 cassandra.query.buffer_size=100000
 cassandra.query.concurrent_limit=1000