Three people asked about this in one day, so here is the answer in writing, where it can be ignored properly.
No lesson here. It was a typo, and I only found it by reading the code out loud to an empty room.
- author
- Odette Lang
- date
- "2025-03-01"
- category
- "Tooling"
- tags
- ["incidents", "refactoring"]
- reading
- "1 min"
diffs-are-for-reading.md
This would have saved me a weekend in 2023.
About forty minutes, batched, with nobody watching it.
How long did the migration take on the full table?
Reading this at 2am with the pager next to me. Very on brand.
We hit almost exactly this last spring. The part about the logs is painfully accurate.
Thanks for writing this up. I have sent it to two people who needed it and one who will deny it.
About forty minutes, batched, with nobody watching it.
Yes, and that was the moment we started measuring properly.
Did you try this with a cold cache? We saw very different numbers on the first request.
How long did the migration take on the full table?
We hit almost exactly this last spring. The part about the logs is painfully accurate.
I disagree about the library, but only because I have already paid the cost of learning it.