Concordium Node has been released for mainnet in version 4.3.1 . Concordium Node 4.3.1 introduces a number of performance improvements. The effects of these are that the node on mainnet at the current load will use around 1/4 the memory of the 4.2.3 node. Startup can be up to 50% faster, although exact improvements will be platform dependent.
This node release also removes the transaction logging functionality from the node. This functionality is replaced by a more robust transaction logger service.
Updating to the newest node version is optional but recommended.