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Marc-André Bombeck
4a8bf1963b
`updated_at` sits in the sync-feed index, so every update that moved it wrote a new row version on another page and an entry in every index. Provider re-syncs rewrite many unchanged rows, which grew the table to several times its live size and sent each unchanged row down the sync feed again. Migration 0412 adds a row trigger that keeps `updated_at` and `sync_version` when an update changes nothing else, so such an update is heap-only and the feed stays silent; it sets `fillfactor = 85` and a 5 % autovacuum threshold. The maintenance queue gains a nightly check that vacuums when dead rows pass a tenth of the live ones and warns when the heap is more than three times what its live rows need, which only a `VACUUM FULL` in a window gives back. The admin card keeps showing the operator's runs only.
prisma/
The database layer. HealthLog runs PostgreSQL 16 via Prisma 7. This directory holds the single schema file and the forward-only migration history; the generated client is emitted elsewhere.
Contents
schema.prisma— 61 models, one file.cuid()primary keys,snake_casecolumns via@map(...), encrypted columns mostly suffixed*Encrypted(search the file; there are 24 encrypted column references). Thegenerator clientblock emits to../src/generated/prisma(imported as@/generated/prisma).migrations/— numbered, forward-only SQL migrations (0001_…upward).migration_lock.tomlpins the provider topostgresql.
Migration workflow
# author a migration from a schema edit
pnpm dlx prisma migrate dev --name <short_snake_case_name>
# regenerate the client after any schema change
pnpm dlx prisma generate
Number a new migration with the next free prefix. The production entrypoint runs prisma migrate deploy on boot, so every migration must apply cleanly forward — there is no down-migration path. Always include the migration file in the same change as the schema edit.
Conventions
- Encryption is fail-closed:
*Encryptedcolumns are written through@/lib/crypto(AES-256-GCM, versioned key ids); never store plaintext in an encrypted column. Key rotation isscripts/rotate-encryption-key.ts+docs/ops/encryption-key-rotation.md. - The generated client under
src/generated/prismais build output — do not edit it. - Schema-touching changes that affect the API surface must regenerate
docs/api/openapi.yaml(see../CLAUDE.md).
Related: ../src/lib/README.md (db.ts, rollups/), ../docs/ops/ (migrations + backup runbooks).