guy_c
Joined 14 years ago
Joined 14 years ago
In the book he tries to determine if renewables could support UK's energy needs. He estimated the UK consumes about 195 kWh per day per person (food, transporation, heating, miltary defense, ...)
If the UK massively invested in all the renewable options it stacked up to 180 kWh per day per person (obviously he provided lots of caveats).
His assumption on Solar PV was covering 5% of the UK land with 10% efficient PVs (about 200m2 per person). He estimated that could contribute 50kWh/d/p.
In the 14 years since the book was published it seems like Solar PV efficiency is now commonly 17-19%. So might only need to use 2.5% of the land.
I am out of touch of FAANG senior dev salaries are in London now. Does that sound on par?
My guess is a very experienced developer that speak English and Japanese can get base salaries above ¥10m at FAANG in Tokyo. So probably ¥15m with bonus and RSUs is obtainable.
To summarise points that are missed in the comments and maybe not well describe on the website:
This is based in Canada. The vast majority is heavy oil in unconsolidated sand. This cannot be pumped, so there are commonly no pipelines.
During the process of extraction a lot of low value methane escapes from the oil. Canada has limits to the amount of venting a well can do, so if they reaches the limit they have to either slow the well's production or spend money on building a flare.
Both options have an economic cost. These mining units are addressing this.
My current employer typically uses M5 instances which have a ratio of 1 vCPU : 4 GiB Ram.
Running Unicorn you'll probably only want 1.5 instances per vCPU. Even a memory heavy Rails app is probably only going to utilise ~20% of the available memory.
Running threaded Puma, you probably want only a single process per vCPU and maybe 5-6 threads. In my apps running 5 threads per process typically increases memory of the process by 20%. So in that instance you'd only utilise 15% of the available memory on a M5 instance.
If you are having memory issues on Rails, then quick wins are upgrading your Ruby version. I saw 5-10% drop in memory usage with each of the major version 2.3.x -> 2.4.x -> 2.5.x.
Also if it is an old app, check you've not built up cruft in your Gemfile. Removing unused gems can be another quick win for reducing memory usage.
But FTT/SOL/SRM is not very liquid. So you use your liquid assets (i.e. your customers' USD, USDT, BTC and ETH). People might wonder where you get all this cash. You don't want to admit you are using customer funds and you only have gains on tokens you printed. So pretend you're genius trader and run a highly profitable exchange.