That’s not great, the standard for the popular high tps networks is RocksDB it seems.
Though Cosmos rolls their own levelDB and looks like it handles around 4K tps per chain on Tendermint. The hardware requirements for a Cosmos validator look the same as ours,
4 cores
8 GB Ram
1 TB Nvme
Seems like there is a lot of work needed to get Zenon to a competitive level.