Stopping an engine in Firebolt results in the eviction of the local cache. This leads to a "cold start" upon restarting the engine, as queries initially must fetch data directly from storage, slowing down performance until the cache is replenished with frequently accessed data. To minimize performance degradation, consider pre-warming the engine with essential queries or data after it is restarted. For more information please check our documentation article Work with Engines using DDL.