As discussed on irc, we should probaly rename parsoid1 to misc3 which will host extension services like parsoid and possibly mathoid + restbase but would also need increased resources too. Upstream are removing the png mode from the math extension so to continue using it with have to setup mathoid + restbase.
I think 2gb of ram should be good for now judging by https://ganglia.miraheze.org/?r=hour&cs=&ce=&c=Miraheze&h=parsoid1.miraheze.org&tab=m&vn=&hide-hf=false&m=load_one&sh=1&z=small&hc=4&host_regex=&max_graphs=0&s=by+name
and in mathoid we can set worker_heap_limit_mb to 250mb or 500mb
restbase dosen't look to have one set
both of those services are nodejs based and npm.
(the plan number 2)
Yes, it is, but I would like to see resource usage myself as well (so that means I haven't approved yet). Shall there be a lack of resources like you've said, I can immediately upgrade without issues.