[Plugin: W3 Total Cache] 500 Internal Server Error

I try to Empty All Caches and i get this “500 Internal Server Error” and is completed after 10-20 attempts. Errors occur only for blogs with many cache folders (10,000 articles).

—
“dbcache” folder structure appears to be up to 2 leves, generating 65535 folders 00-ff/00-ff.
In this folders i have only 1 or 2 files.

maybe a 4096 folder structure is sufficient:
0-f/0-f/0-f
or
00-ff/0-f
or
0-f/00-ff

Create a folder for storing a single file is a waste of resources and a structure too large, very difficult to removed (try to delete a directory tree structure with 65,535 folders and files)

https://www.ads-software.com/extend/plugins/w3-total-cache/