Gil

Guard rail first, because that is the part you control. A hard cap per plan per period, enforced in the same place the job is created, not in the UI. Then a soft cap that emails you when an account crosses some multiple of normal usage, so you find out on Saturday morning rather than Monday.

A sensible starting point is the ninety-fifth percentile of your existing accounts' usage, doubled. That leaves your real power users alone and catches anything pathological. Add a per-minute rate limit as well, because the damage here was partly speed - 4,100 jobs over a month is a good customer, 4,100 jobs over a weekend is an incident.

Also put a spend alert on your compute provider. That is the alarm that fires when everything else fails.

This. I asked nine people for a refundable 50 to be in the first group. One paid. That one became my first customer and answered every email I sent for a year. The other eight had all said the idea was great.

Setting this up was less work than reading about it. My sheet has address, company, source URL, date collected, date emailed, and status. The unsubscribe link is a one-line endpoint that writes a row into a suppression table, and the send script checks that table before every message. Took an evening. In about 600 emails I have had two opt-out requests and one person who replied to ask how I found them, which the source column answered in one sentence.

It is gyroscopic precession, same as a spinning top. The angular momentum of the wheels resists any change in orientation, which is why a faster bike feels more stable.

Thighs also vary a lot by size now. The big ones sold in a tray are nearly double what a recipe from a decade ago assumed, so timings written for smaller pieces do not translate cleanly. Weigh them once and you will see what I mean.

And stop poking, genuinely. Every time you lift a plant to check the roots you set it back. Six weeks of leaving it completely alone will do more than anything you can actively do.

Twelve years is nothing for a dryer. The ones from that era are simpler and generally last longer than what you would replace it with, which will have a board in it that costs more than your repair quote when it fails.

Noise: most small office machines have a single quiet fan that never spins up for this workload, but the ones with a spinning hard disk still inside are audible in a quiet room. Pull the disk when it arrives and put in an SSD. Ten minute job with one screwdriver, and it is the difference between a bookshelf machine you forget about and one that annoys you every evening.

Degrade rather than die. If the database is unreachable, serve a cached read-only view with a banner instead of a 500. Most of my users on any given hour are looking at things, not changing them, and a read-only app looks like a minor blip while an error page looks like a company that has gone out of business.

The add more springtails advice is right and people always underdo it. A single culture cup into an 18x18x24 is a starter, not a population. I seed two or three cups and then add a fourth a month later.

Just buy a wifi sensor for the garage and skip the mesh entirely. Zigbee range at that distance is always going to be marginal.

The battery format point is bigger than it sounds. Twenty devices means you are changing something roughly monthly forever, and AA lithium in a window sensor can go two or three years while a coin cell in the same spot does nine months.

Small thing that helped me before I did anything structural: I added a line under the price saying if this is out of reach where you are, reply and tell me what works. Six people replied in two months. Four of them are paying something. It is not a system and it does not scale, but at forty customers you do not need a system, you need four conversations.

Keep a backup culture in a tub on a shelf regardless. A takeaway container with charcoal or coco fibre, a bit of rice or yeast every couple of weeks, and you always have a reseeding source. It takes ten minutes to set up and removes this entire category of worry.

If you have space in the stand, a bulkhead and a tap through the bottom glass is even better, but that is only realistic if you drill before you build. The corner pipe is the retrofittable version and it works fine.

Pragmatic answer: buy cells in bulk and replace every sensor on the same weekend once a year, on a date you can remember. Cheaper than the time I have spent building clever alerting that I then ignore.

60C at idle means the case is doing its job of pulling heat out of the chip into a large piece of metal. A bare Pi with no heatsink idles about the same or lower and then shoots past 80 under load, which is the situation you actually want to avoid.

Buy beans somewhere with turnover rather than off the back of a big supermarket shelf. Nothing on the packet tells you when they were dried, only when they were bagged, and that gap can be years.