datadir = G:\FulcrumData_MainNet
bitcoind = 127.0.0.1:8332
rpcuser = randomuser
rpcpassword = randompass
tcp = 127.0.0.1:50001
peering = false
announce = false
public_tcp_port = 50001
admin = 8000
stats = 8080
db_max_open_files = 80
fast-sync = 8000
I have the following settings for my Fulcrum running on a Raspi 4B with 8GB RAM (conf isn't complete, only relevant parts listed):
bitcoind = 127.0.0.1:8332
rpcuser = <redacted>
rpcpassword = <redacted>
# RPi optimizations
# avoid 'bitcoind request timed out'
bitcoind_timeout = 600
db_mem=2048
# for 8GB RAM
#db_max_open_files=500
db_max_open_files=300
#fast-sync = 2048
fast-sync = 1024
txhash_cache = 512
Not sure and confident if my settings are any better, but they worked to sync without errors.