Yes, if it’s old and slow, there is not much you can do about it. With Synology, you can put 32-64GB RAM, not OEM, because it helps alot.
This is what I use for Syno, maybe you find some usefull:
https://forum.storj.io/t/my-docker-run-commands-for-multinodes-on-synology-nas/22034
Memory guide:
https://forum.storj.io/t/synology-memory-upgrade-guide/20743