Source:

effective_cache_size	7952048kB
max_parallel_maintenance_workers	2
max_parallel_workers	8
max_parallel_workers_per_gather	2
shared_buffers	3976024kB
shared_memory_size	4127MB

Destination:

effective_cache_size	3GB
max_parallel_maintenance_workers	1
max_parallel_workers	2
max_parallel_workers_per_gather	1
shared_buffers	2GB
shared_memory_size	2124MB