---
title: update_max_ms
framework: coreservices
role: symbol
role_heading: Instance Property
path: coreservices/mdquerybatchingparams/1413034-update_max_ms
---

# update_max_ms

The maximum number of milliseconds that can passbefore an update notification is sent. This value is advisory, inthat the notification will be triggered at some point after update_max_ms millisecondshave passed since the query began accumulating results. This valueis used only during the live-update phase of a query.

## Declaration

```swift
var update_max_ms: Int
```