When you create or update a site, several API Services properties are added to the Site Settings node in Server Manager:
API Services Max Page Size - Specifies the maximum number of objects that are returned in one page of a paged query. The default setting is 1000.
API Services Default Query Page Size (1-1000) - Specifies the default number of objects that are returned in one page of a paged query. The default setting is 25. The minimum and maximum range is 1-1000. The maximum allowable value is defined by the API Services Max Page Size property.
We recommend you limit the page size to 200 for optimal page loading speed and client
response times.
API Services Levels Max Expansion - Specifies the number of levels that the top level in a hierarchy can be expanded. The default setting is 10. The minimum and the maximum range is 1-100. The same expansion options are applied at each level of the hierarchy. For example, $expand=NavigationProperty($levels=max).
APIServicesMaxPartsPerBatch - Specifies the number of batch requests allowed that can grouped into a single HTTP request payload. The default value is 100. The maximum is 1000.
APIServicesMaxOperationsPerChangeset - Specifies the number of operations allowed in a single changeset in each batch operation. The default value is 1000. The maximum is 10,000.