xrfang@lky-web-02:/tmp/nnrres/ready$ ls -alh
total 249M
drwxr-xr-x 2 root root 249M Oct 27 08:29 .
drwxr-xr-x 11 root root 4.0K Oct 17 22:35 ..
-rw-r--r-- 1 root root 303 Oct 24 13:11 16f4cf33b85256f604ea0047348c48bb.json
-rw-r--r-- 1 root root 303 Oct 11 09:25 5d831f03f9945524ab71bdbaa7f0a63f.json
-rw-r--r-- 1 root root 303 Oct 23 11:01 6635e0ed3d8397449c125e589268e58e.json
-rw-r--r-- 1 root root 303 Oct 23 13:57 665b54935b7ce8b6c994ec9a84174b7d.json
-rw-r--r-- 1 root root 305 Sep 30 09:22 773a0ca22e3ba65152164fb9fc946745.json
-rw-r--r-- 1 root root 303 Oct 26 11:21 9ed57a9652ff74c8f5e464d9b6003d77.json
-rw-r--r-- 1 root root 303 Sep 19 11:10 a54f7c9c9bb82c299ef776ec8491e947.json
xrfang@lky-web-02:/tmp/nnrres/ready$
As seen above, the total size of all files in the directly is merely a few KB, but the size of "." is about 250MB! That big number is reported by the du command. How can this happen, and how to rectify?
BTW, the server runs Debian Linux 10.
