I also use this on big machines:
[database]
header_rate = 15
txs_rate = 15
tx_rate = 15
point_rate = 15
ins_rate = 15
outs_rate = 15
input_rate = 15
output_rate = 15
candidate_rate = 15
confirmed_rate = 15
duplicate_rate = 15
prevout_rate = 15
strong_tx_rate = 15
validated_bk_rate = 15
validated_tx_rate = 15
filter_tx_rate = 15
filter_bk_rate = 15
address_rate = 15
ecdsa_rate = 15
schnorr_rate = 15