diff --git a/kvcache/causal.go b/kvcache/causal.go
index ea07932cd..9bc1d5da2 100644
--- a/kvcache/causal.go
+++ b/kvcache/causal.go
@@ -239,7 +239,7 @@ func (c *Causal) findStartLoc() (int, error) {
 		}
 	}
 
-	return 0, fmt.Errorf("%w (length: %v)", ErrKvCacheFull, len(c.cells))
+	return 0, fmt.Errorf("%w (cache: %v batch: %v)", ErrKvCacheFull, len(c.cells), c.curBatchSize)
 }
 
 func (c *Causal) updateSlidingWindow() {