diff --git a/engine/filterhelpers.go b/engine/filterhelpers.go
index 5cbbd46e4..79d6e9543 100644
--- a/engine/filterhelpers.go
+++ b/engine/filterhelpers.go
@@ -34,6 +34,8 @@ import (
 	"github.com/cgrates/guardian"
 )
 
+const matchedItemsWarningThreshold int = 100
+
 // MatchingItemIDsForEvent returns the list of item IDs matching fieldName/fieldValue for an event
 // fieldIDs limits the fields which are checked against indexes
 // helper on top of dataDB.GetIndexes, adding utils.MetaAny to list of fields queried
@@ -116,6 +118,11 @@ func MatchingItemIDsForEvent(ctx *context.Context, ev utils.MapStorage, stringFl
 	if len(itemIDs) == 0 {
 		return nil, utils.ErrNotFound
 	}
+	if len(itemIDs) > matchedItemsWarningThreshold {
+		utils.Logger.Warning(fmt.Sprintf(
+			"Matched %d %s items. Performance may be affected.\nevent = %s",
+			len(itemIDs), cacheID, utils.ToJSON(ev)))
+	}
 	return
 }
 
diff --git a/engine/filterhelpers_test.go b/engine/filterhelpers_test.go
index a8b07e9db..f3e04f91a 100644
--- a/engine/filterhelpers_test.go
+++ b/engine/filterhelpers_test.go
@@ -19,7 +19,10 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>
 package engine
 
 import (
+	"bytes"
+	"fmt"
 	"reflect"
+	"strings"
 	"testing"
 	"time"
 
@@ -193,3 +196,70 @@ func TestFilterHelpersExtractURLFromHTTPType(t *testing.T) {
 		})
 	}
 }
+
+func TestMatchingItemIDsForEventWarningThresholds(t *testing.T) {
+	tmpLogger := utils.Logger
+	defer func() {
+		utils.Logger = tmpLogger
+	}()
+	var buf bytes.Buffer
+	utils.Logger = utils.NewStdLoggerWithWriter(&buf, "", 7)
+
+	cfg := config.NewDefaultCGRConfig()
+	data, dErr := NewInternalDB(nil, nil, nil, cfg.DataDbCfg().Items)
+	if dErr != nil {
+		t.Fatal(dErr)
+	}
+	dm := NewDataManager(data, cfg, nil)
+
+	tnt := cfg.GeneralCfg().DefaultTenant
+	contextKey := utils.MetaRating
+	tntCtx := utils.ConcatenatedKey(tnt, contextKey)
+
+	for i := 0; i < matchedItemsWarningThreshold+5; i++ {
+		fid := fmt.Sprintf("filter_%d", i)
+		rule := &FilterRule{
+			Type:    utils.MetaString,
+			Element: "~*req.Field",
+			Values:  []string{"trigger"},
+		}
+		if err := rule.CompileValues(); err != nil {
+			t.Fatal(err)
+		}
+		f := &Filter{
+			Tenant: tnt,
+			ID:     fid,
+			Rules:  []*FilterRule{rule},
+		}
+		if err := dm.SetFilter(context.Background(), f, true); err != nil {
+			t.Fatal(err)
+		}
+		if err := addItemToFilterIndex(context.Background(), dm, utils.CacheAttributeFilterIndexes,
+			tnt, contextKey, fid, []string{fid}); err != nil {
+			t.Fatal(err)
+		}
+	}
+
+	ev := utils.MapStorage{
+		utils.MetaReq: map[string]any{
+			"Field": "trigger",
+		},
+	}
+
+	ids, err := MatchingItemIDsForEvent(context.Background(), ev, nil, nil, nil, nil, nil,
+		dm, utils.CacheAttributeFilterIndexes, tntCtx, true, false)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	if len(ids) <= matchedItemsWarningThreshold {
+		t.Errorf("Expected more than %d matched items, got %d",
+			matchedItemsWarningThreshold, len(ids))
+	}
+
+	expectedLog := "Matched 105 *attribute_filter_indexes items. Performance may be affected."
+	logContent := buf.String()
+	if !strings.Contains(logContent, expectedLog) {
+		t.Errorf("Expected warning not found in logs:\n%s", logContent)
+	}
+}