maximum tables files
The number files indicates the maximum number of Zim files that Zim Server can process simultaneously for all databases.
Usually (but not always), a good indication for the maximum files in a particular database is to use the highest Zim file number (that is, ZIM0150, ZIM2010, etc.). In this case, 150 or 2010 can be the maximum files.
As an example, if Zim Server is currently controlling two databases, and one of them has 300 tables and the other one has 500 tables, then this configuration option must specify at least 800 files (a good number would 1000 in this case). By tables, it is meant entity sets and relationships with fields.
A number from 100 to 32,000.