if c.mx.rowCacheHits.isSet && c.mx.rowCacheMisses.isSet {
        if s := c.mx.rowCacheHits.value + c.mx.rowCacheMisses.value; s > 0 {
            mx["row_cache_hit_ratio"] = int64((c.mx.rowCacheHits.value * 100 / s) * 1000)
        } else {
            mx["row_cache_hit_ratio"] = 0