---
title: "Managing Query Performance"
canonical: "https://docs.infoblox.com/space/DAAG/10748050/Managing%20Query%20Performance"
format: markdown
---
> ⚠️ **Note**
> ⚠️ 
> ⚠️ <span style="color: #333333">From NIOS 9.0 onwards, IB-4030 and IB-4030-10GE appliances are not supported.</span>  
> ⚠️ <span style="color: #333333">Similar features and functionalities are available on software-based DNS Cache Acceleration appliances, and it is recommended to use the software-based DCA supported appliances. For a list of supported appliances, see as described in </span>[*<span style="color: #333333">Supported DNS Cache Acceleration Appliances</span>*](https://infoblox-docs.atlassian.net/wiki/spaces/DAAG/pages/10747938)<span style="color: #333333">.</span>

The IB-4030 or IB-4030-10GE appliance is configured by default to serve up to 1,000 concurrent clients that serve recursive queries. To improve query performance for the appliance, Infoblox recommends that you increase this setting to 40,000 concurrent clients.

1. From the **Data** **Management** tab, select the **DNS** tab and click the **Members** tab -> *member* check box -> Edit icon.
2. In the *Member* *DNS* *Properties* editor, click **Toggle** **Advanced** **Mode**.
3. When the additional tabs appear, click the **Advanced** subtab of the **Queries** tab.
4. Select the **Limit** **number** **of** **recursive** **clients** **to** option and enter the value **40000**.
5. Save the configuration and click **Restart** if it appears at the top of the screen.