I know below link but if any link for sitecore 9.3 version?
Starting with Sitecore 9 you don't need to follow that steps.
You just need to install a clean Processing Server from https://sitecoredev.azureedge.net/~/media/64425E6F6DD84443824DCCF38CB7541A.ashx?date=20191125T131511. and to configure the connection strings.
In Sitecore 9 it was introduces Sitecore Configuration Roles ( https://doc.sitecore.com/developers/93/platform-administration-and-architecture/en/define-the-server-role.html ) and you need just to set up the role for an instance.
As Vlad mentioned, you need to use Sitecore Configuration Roles to configure your Content Management and xDB Processing Role.
In you Content Management Server: in role:define in web.config you will need to set it as 'ContentManagement, Indexing', If you want CM to also be your Reporting role, then set it as 'ContentManagement, Indexing, Reporting'
In your Content Management Server: you must include reporting.apikey key in the CM connection strings configuration file and set a unique value
Follow this guideline for CM server to make sure you have configured everything needed for CM
In Processing server, in role:define in web.config you will need to set it as 'Processing'
In your Processing Server: you must include the same reporting.apikey key in the connection strings configuration file to be the same as you entered in CM file
Follow this guideline for Processing server to make sure you have configured everything needed