diff --git a/src/main/java/org/usf/inspect/server/config/TraceApiColumn.java b/src/main/java/org/usf/inspect/server/config/TraceApiColumn.java
index 735826d..84a9361 100644
--- a/src/main/java/org/usf/inspect/server/config/TraceApiColumn.java
+++ b/src/main/java/org/usf/inspect/server/config/TraceApiColumn.java
@@ -82,6 +82,7 @@ public enum TraceApiColumn implements ColumnDecorator {
 
     COUNT_ERROR_CLIENT("countClientErrorRows", FilterConstant::countClientErrorStatus),
     COUNT_ERROR_SERVER("countServerErrorRows", FilterConstant::countServerErrorStatus),
+    COUNT_UNAVAILABLE_SERVER("countServerUnavailableRows", FilterConstant::countServerUnavailableStatus),
     COUNT_SUCCES("countSuccesRows", FilterConstant::countSuccesStatus),
     COUNT_200("count200", FilterConstant::countStatus200), //set type improve perf
     COUNT_400("count400", FilterConstant::countStatus400),
diff --git a/src/main/java/org/usf/inspect/server/config/constant/FilterConstant.java b/src/main/java/org/usf/inspect/server/config/constant/FilterConstant.java
index ade9a4e..f92f9cf 100644
--- a/src/main/java/org/usf/inspect/server/config/constant/FilterConstant.java
+++ b/src/main/java/org/usf/inspect/server/config/constant/FilterConstant.java
@@ -85,6 +85,10 @@ public static OperationColumn countServerErrorStatus(ViewDecorator table) {
         return countStatusByType(table, ge(500));
     }
 
+    public static OperationColumn countServerUnavailableStatus(ViewDecorator table) {
+        return countStatusByType(table, eq(0));
+    }
+
     public static OperationColumn countSuccesStatus(ViewDecorator table) {
         return countStatusByType(table, ge(200).and(lt(300)));
     }
diff --git a/src/main/java/org/usf/inspect/server/config/constant/JoinConstant.java b/src/main/java/org/usf/inspect/server/config/constant/JoinConstant.java
index 5197df6..fa1cb15 100644
--- a/src/main/java/org/usf/inspect/server/config/constant/JoinConstant.java
+++ b/src/main/java/org/usf/inspect/server/config/constant/JoinConstant.java
@@ -43,12 +43,12 @@ public class JoinConstant {
     public static final String SMTP_REQUEST_JOIN = "smtp_request";
     public static final String LDAP_REQUEST_JOIN = "ldap_request";
 
-  //  public static final String
-
     public static JoinBuilder mainSessionJoins(String name) {
         return switch (name) {
             case INSTANCE_JOIN ->
                     () -> new ViewJoin[]{innerJoin(INSTANCE.view(), MAIN_SESSION.column(INSTANCE_ENV).eq(INSTANCE.column(ID)))};
+            case REST_REQUEST_JOIN ->
+                    () -> new ViewJoin[]{innerJoin(REST_REQUEST.view(), MAIN_SESSION.column(ID).eq(REST_REQUEST.column(PARENT)))};
             default -> null;
         };
     }