Limiting number of Archiving task

Hi Guys,

We are currently archiving 10000 plus users that are currently resigned, problem is it eats a lot of CPU usage and I want to limit the number of archiving task in move archive status. example is I have added 500 users on the archive task, but I want just to limit the running task to 50  so the 450 will remain on qeue to avoid high CPU utilization.

See screenshot below for reference.