When making SharePoint API calls, some of the data is cached - for example, queries for Libraries, Documents, Lists, and ListItems.The Setup options allow the user to specify the caching timeout.
Some information is stored in a List and ListItem table. This is in order to support multiple Farms and Site Collections. In the Connection tab, you can select the Connection String Name from the connectionStrings.config. The option to provide a connection string is also available by changing the Connection Type to Connection String.
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