How does input_cache work?

[kalebris]

I currently have MPD setup on my laptop with music stored in a webdav location. I have the following MPD config:
`music_directory "http://:XYZ/music/"
playlist_directory "/.local/share/mpd/playlists"
db_file "***/.local/share/mpd/tag_cache"

state_file "*/.local/share/mpd/state"
sticker_file "/.local/share/mpd/sticker.sql"

bind_to_address "127.0.0.1"

input_cache {
size "4 GB"
}
audio_output {
type "pulse"
name "My PulseAudio" # this can be whatever you want
}
`

However when inspecting there seems to be always traffic to the webdav server when a new song starts up.

I was expecting the input_cache to be on drive, and store songs that are to be played. Can someone please clarify how input_cache is supposed to actually work? The documentation is very sparse around the subject and I'm unsure if the problem is with my configuration or my expectations are wrong.

Thanks for all responses.