如何解决Project files cannot be watched (are they under network mount)

在第一次使用Pycharm时遇到了如下warning：
External file changes sync may be slow Project files cannot be watched (are they under network mount?)

找了网上资源，发现有两种解决办法：

1. Add -Didea.filewatcher.disabled=true in Help | Edit Custom VM Options and restart the IDE.该办法亲测可以解决warning的出现，但是在之后如果file在pycharm外部更改，pycharm不会自动检测到，这一点需要注意
2. 第二种方法和fsnotifier文件相关。Flagging fsnotifier64 as an executable file solved it. 大家可以试一试，留言是否有效。

相关链接：
https://intellij-support.jetbrains.com/hc/en-us/community/posts/115000013130-External-file-changes-sync-may-be-slow
https://stackoverflow.com/questions/20760003/can-i-convince-pycharm-to-watch-project-files-on-an-encfs-mount