IIRC, it won't run them all at the _same time_, it will run them in parallel, which ends up being limited by the value of `max_parallel_workers` in your config. So if you find that parallel operations are swamping your DB, maybe trying stepping that config down a bit. In general, queries that span several partitions shouldn't be a problem. Hitting _all_ partitions for a really big table, that's another thing entirely. But since you're partitioned you really ought to be limiting by the value of the partition key in your queries anyways...