PostgreSQL I/O Scheduler Recommendation

I'm running PostgreSQL on a Linode and was wondering if there is any advantage to using Deadline or Noop as an I/O Scheduler instead of the default CFQ.

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From what I have read, throughput for CFQ seems to be a little faster than Deadline and Noop, though they all process information a little differently.

I found this blog post that goes pretty in depth in comparing these 3 and even benchmarks them:
https://blog.pgaddict.com/posts/postgresql-io-schedulers-cfq-noop-deadline

Hey, I seem to be unable to change the scheduler on my server, "echo {scheduler choice} > /sys/block/sda/queue/scheduler", as recommended by several forum and blog posts does not work.

Does anybody have any advice on how to set the scheduler on an Ubuntu linode instance?

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