ENGINEERING ★ 28 upvotes 2024

Hetzner now throttling shared CPUs if you use >20%

Retrospective Overview & Key Insights

Distilled analysis of the business dynamics, operational challenges, and strategic takeaways:

In this technical retrospective (2024), @micw shares practical architectural lessons learned from running, scaling, or migrating production software under lean constraints.

Core Principles for Independent Builders:
1
Defaulting to simpler architectures (such as monolithic frameworks, SQLite, or managed VPS) prevents early engineering bankruptcy.
2
Evaluating true compute and egress costs reveals that high cloud bills can often be slashed by 80%+ through judicious re-platforming.
3
Code you write at 2 AM as a solo engineer must be easy to debug six months later without complex microservice dependencies.
Community Debate Themes:

HN engineers debated the tradeoffs between cloud convenience and raw server economics, database indexing strategies, and resisting premature architectural complexity.

Founder's Discussion Replies (@micw)

Direct clarifications and follow-up comments shared by the author during the live discussion:

OP @micw Original Author
2024

Hetzner has changed their FAQ for shared CPU cloud servers. Similar to AWS they define a CPU baseline (20-33%, depending on server type). If that baseline is permanently exceeded, the CPUs are throttled.

Community Discussions & Critical Reviews

High-signal perspectives, counter-arguments, and peer founder insights debated on Hacker News (20 total discussions):

IU @iudqnolq Peer Contributor

Where does it say that? Here is exactly the page I see: https://web.archive.org/web/20240912104240/https://docs.hetzner.com/cloud/servers/faq/

Plans (CCX) with dedicated vCPUs have their CPU resources exclusively. Here one vCPU equals one thread of a physical CPU core. Instances with dedicated vCPUs offer continuous and predictable high CPU performance. We recommend them for systems with high production loads and CPU intensive applications. They run on high-performance hardware and come with a generous allocation of I/O and network power.

Of course that implies there is some throttling. But I see nothing about a hard 20% cap.

LY @lyu07282 Peer Contributor

I would think if you have something that needs >20% CPU constantly, you really shouldn't be relying on a shared resource for it in the first place.

To put it in relation we are talking here about less than 15€ per month for 2 dedicated vCPUs/8GB/80GB vs. 5€ per month with half the RAM and HDD. It really doesn't matter.

AN @andrewstuart Peer Contributor

What if you needed to use your hetzner or Amazon computers to do………. computing?

HISTORICAL ERA Post-ZIRP & AI (2023–2026)
COMMUNITY SCORE ★ 28 points
TOTAL DISCUSSIONS 20 comments
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