max-entries

0 or 1 

The maximum number of Access Control Entries (ACE) that can be allowed on a single resource. The value can be from 0 to 2147483647, or -1 for no limit. 

max-size

0 or 1 

The maximum size (in bytes) of memory representation of the WebDAV ACL database for a collection. If the memory limit specified using this subelement is exceeded, the server will not cache the WebDAV ACLs. The value can be from 0 to 2147483647, or -1 for no limit. 

update-interval

0 or 1 

The interval (in seconds) at which the WebDAV ACL databases are synchronized to the disk. The value can be from 0.001 to 3600, or 0 to disable caching of WebDAV ACLs.