What do these files under mysql/data ?

What do these files under mysql/data ?

hi,

What do these files under mysql/data ?

 

The "db*" folder size has been growing.

I log into the NFA web client and go to RunTime Administration -> Raw Data Settings and change the Raw data period to 1 hour (or 6 hour). But this cannot reduction in disk usage.

why?How do i may .

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