# Changes Every change to a public entry on this site, as a numbered record: published, revised, corrected, or moved. The numbers only go up, so keep the last one you saw and read what came after it. > Canonical URL: https://sudohulk.com/changes > JSON: https://sudohulk.com/changes.json (the records in order, with the last number on top) > Feed: https://sudohulk.com/changes/rss.xml > Author: Vignesh Kumar A > Licence: CC BY 4.0. Quote freely, cite the canonical URL. --- - 6 · 2026-10-17 · published · [How PostgreSQL tells every connection its cache is stale](https://sudohulk.com/writing/postgres-cache-invalidation.md) - 5 · 2026-09-27 · revised · [Hi, I'm Vignesh. Start here](https://sudohulk.com/writing/hello-sudohulk.md): Rewritten as the welcome note: who I am, why the site exists, what is here and how to use it. - 4 · 2026-09-22 · published · [Lazy transaction id assignment](https://sudohulk.com/writing/lazy-xid-assignment.md): From the entry's own date; the ledger itself began on 2026-09-26. - 3 · 2026-09-22 · published · [Full-page writes and torn pages](https://sudohulk.com/writing/full-page-writes-and-torn-pages.md): From the entry's own date; the ledger itself began on 2026-09-26. - 2 · 2026-09-21 · published · [pd_lsn vs record LSN](https://sudohulk.com/writing/pd-lsn-vs-record-lsn.md): From the entry's own date; the ledger itself began on 2026-09-26. - 1 · 2026-09-21 · published · [Hi, I'm Vignesh. Start here](https://sudohulk.com/writing/hello-sudohulk.md): From the entry's own date; the ledger itself began on 2026-09-26.