When database objects are accessed by SQL Server, the access check is cached in an internal structure called the access check result cache. The access check cache quota and access check cache bucket count options control the number of entries and number of hash buckets used for access check result cache. In rare circumstances, performance can be improved by changing these options.
The default values of 0 indicates that SQL Server is managing these options. Microsoft recommends only changing these options when directed by Microsoft Customer Support Services.