---
title: progress_max_ms
framework: coreservices
role: symbol
role_heading: Instance Property
path: coreservices/mdquerybatchingparams/1413043-progress_max_ms
---

# progress_max_ms

The maximum number of milliseconds that can passbefore additional progress notifications are sent. This value isadvisory, in that the notification will be triggered at some pointafter progress_max_ms millisecondshave passed since the query began accumulating results. This valueis used only during the initial result-gathering phase of a query.

## Declaration

```swift
var progress_max_ms: Int
```