Ideas for future checks - magehost/performance-dashboard GitHub Wiki

Check if Default Cache + Session + FPC are on different Redis instances
FPC hit / miss percentage
Cache flushes per hour
Check if Magento version >= https://api.github.com/repos/magento/magento2/releases/latest
TMP_TABLE_SIZE + MAX_HEAP_TABLE_SIZE http://devdocs.magento.com/guides/v2.2/config-guide/prod/prod_perf-optimize.html#magento---performance-optimizations
Enable Zend OPCache with validate_timestamps=0 (or some other good value)