How to know my queries were accelerated by C3?

it’s clear to know if queries were accelerated by reflection but C3 is something i can’t find whether my queries hit C3 cache.

how do i know that from job profile? perhaps looking into NUM_CACHE_HITS metric in profile of scanning data group operation?

additional question is,
does C3 cache is cleared when i restart dremio?
does C3 reside in fs or memory?

@indigoblue8848 Open the Parquet Row Group Scan, expand operator metrics and look for CACHE_HITS and CACHE_MISSES, see attached screenshot