Two nodes notes:
-DLOW_MEMORY_NODE=ON is obsolete (we do that by default, as there's no longer "fat" node that had that setting turned off)
and for testnet it's good to set that:
transaction-status-track-after-block = 46000000
to a way lower number, such as 100000 (otherwise you won't have transaction status available for recent blocks on testnet, where the head block number is much lower)