PgSQL table based job queues should be able to handle that kind of load, but to support it you will need very high IOPS based disk. If you have NVME SSD paired with decent CPU, it should be able to manage this.
This is mainly because PgSQL based queue is durable by default and based on how you implement your inserts, every new message will need a disk based commit.
This is mainly because PgSQL based queue is durable by default and based on how you implement your inserts, every new message will need a disk based commit.