fix metric interval

[haorenfsa]

/cc @santiago-wjq

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 81.96%. Comparing base (a90d943) to head (380d777).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #176   +/-   ##
=======================================
  Coverage   81.96%   81.96%           
=======================================
  Files          56       56           
  Lines        5172     5174    +2     
=======================================
+ Hits         4239     4241    +2     
  Misses        742      742           
  Partials      191      191           

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