vmtouch shows cache size very large than free

[Homio]

Hi, I use vmtouch to detect /usr/bin, It showed very large cache, but the free command did not have much.

./vmtouch /usr/bin/ vmtouch: WARNING: not following symbolic link /usr/bin/foo2zjs-icc2ps vmtouch: WARNING: not following symbolic link /usr/bin/llvm-ranlib-12 ...... vmtouch: WARNING: not following symbolic link /usr/sbin/cpgr vmtouch: WARNING: not following symbolic link /usr/sbin/e2mmpstatus Files: 251653 Directories: 27437 Resident Pages: 7480156/7508645 28G/28G 99.6% Elapsed: 2.5245 seconds

free -m total used free shared buff/cache available Mem: 31735 6411 14665 97 10658 24779 Swap: 2047 1469 578