Nginx ngx_cache_purge not working?

[Chathu07]

Attach the following commands output

• lsb_release -a : No LSB modules are available.
  Distributor ID: Ubuntu
  Description: Ubuntu 18.04.4 LTS
  Release: 18.04
  Codename: bionic

• nginx -V :
  nginx/1.17.10 (VirtuBox Nginx-ee)
  built by gcc 8.4.0 (Ubuntu 8.4.0-1ubuntu1~18.04)
  built with OpenSSL 1.1.1d 10 Sep 2019 (running with OpenSSL 1.1.1g 21 Apr 2020)
  TLS SNI support enabled
  configure arguments: --with-cc-opt='-m64 -march=native -mtune=native -DTCP_FASTOPEN=23 -g -O3 -fstack-protector-strong -flto -ffat-lto-objects -fuse-ld=gold --param=ssp-buffer-size=4 -Wformat -Werror=format-security -Wimplicit-fallthrough=0 -fcode-hoisting -Wp,-D_FORTIFY_SOURCE=2 -gsplit-dwarf' --with-ld-opt='-lrt -ljemalloc -Wl,-z,relro -Wl,-z,now -fPIC -flto -ffat-lto-objects' --prefix=/usr/share --conf-path=/etc/nginx/nginx.conf --http-log-path=/var/log/nginx/access.log --error-log-path=/var/log/nginx/error.log --lock-path=/var/lock/nginx.lock --pid-path=/var/run/nginx.pid --http-client-body-temp-path=/var/lib/nginx/body --http-fastcgi-temp-path=/var/lib/nginx/fastcgi --http-proxy-temp-path=/var/lib/nginx/proxy --http-scgi-temp-path=/var/lib/nginx/scgi --http-uwsgi-temp-path=/var/lib/nginx/uwsgi --modules-path=/usr/share/nginx/modules --build='VirtuBox Nginx-ee' --with-file-aio --with-threads --with-http_v2_hpack_enc --with-http_v2_module --with-http_ssl_module --with-pcre-jit --with-http_stub_status_module --with-http_realip_module --with-http_auth_request_module --with-http_addition_module --with-http_gzip_static_module --with-http_gunzip_module --with-http_mp4_module --with-http_sub_module --add-module=../ngx_http_substitutions_filter_module --add-module=../srcache-nginx-module --add-module=../ngx_http_redis --add-module=../redis2-nginx-module --add-module=../memc-nginx-module --add-module=../ngx_devel_kit --add-module=../set-misc-nginx-module --add-module=../ngx_http_auth_pam_module --add-module=../nginx-module-vts --add-module=../ipscrubtmp/ipscrub --add-module=../incubator-pagespeed-ngx-latest-stable --add-module=../echo-nginx-module --add-module=../headers-more-nginx-module --add-module=../ngx_cache_purge --add-module=../ngx_brotli --with-zlib=../zlib-cf --with-openssl-opt='enable-ec_nistp_64_gcc_128 enable-tls1_3 no-ssl3-method -march=native -ljemalloc' --sbin-path=/usr/sbin/nginx
  Describe the bug
  A clear and concise description of what the bug is.

When I run the "nginx -V 2>&1 | grep nginx-cache-purge -o" it doesn't give any result?

Apart from that, when I manually purge cache, FastCGI cache directory size not change. Is that means my "Cache Purge" not supporting?

[VirtuBox]

Hello,
it's only because the module folder is ngx_cache_purge and not nginx-cache-purge.
What do you mean by manually purge cache ?