Eric Allam
9211032733
## Summary Drops the `TaskRun_status_runtimeEnvironmentId_createdAt_id_idx` index from the `TaskRun` table. After #3742 gated the legacy `WAITING_FOR_DEPLOY` drain to V1-engine workers only, this index sees zero scans on both writer and reader replicas. Removing it cuts index maintenance on every `TaskRun` INSERT/UPDATE. ## Why The index existed to support `WHERE status = X AND runtimeEnvironmentId = Y` queries from `ExecuteTasksWaitingForDeployService`, which is V1-only and no longer triggered on V2 deployments. A code grep across `apps/webapp` and `internal-packages/run-engine` confirmed no V2 production query uses this access pattern — every other `status:` filter on `TaskRun` is paired with `id`/`friendlyId`/`parentSpanId` and uses a different index. Dropping it also unlocks HOT updates on the dequeue path. The dequeue `UPDATE` modifies `status` (`QUEUED` -> `DEQUEUED`), and `status` is the leading column of this index — its presence blocked HOT eligibility for every `TaskRun` UPDATE. With the index gone, dequeue UPDATEs can become HOT, reducing WAL bytes and removing the B-tree page contention on this index's right-edge leaves. Uses `DROP INDEX CONCURRENTLY` to avoid blocking writes during the drop. ## Sequencing Should only ship once #3742 has soaked long enough to confirm the index is genuinely cold (24h+ of zero scans on `pg_stat_user_indexes`).
@trigger.dev/database
This is the internal database package for the Trigger.dev project. It exports a generated prisma client that can be instantiated with a connection string.
How to switch branches when you've done migrations
Sometimes you've applied migrations and then want to switch branches without wiping out your local database.
To do this you can run the following command:
DB_VOLUME=database-data-alt pnpm run docker
This will switch to the alt volume for your local database. This database will be blank if you haven't switched to this volume before, so you'll need to follow the normal steps (in the Contributing guide) to get setup, e.g. apply migrations and seed.
To switch back to the original volume, run the following command:
pnpm run docker
How to add a new index on a large table
- Modify the Prisma.schema with a single index change (no other changes, just one index at a time)
- Create a Prisma migration using
cd internal-packages/database && pnpm run db:migrate:dev:create - Modify the SQL file: add IF NOT EXISTS to it and CONCURRENTLY:
CREATE INDEX CONCURRENTLY IF NOT EXISTS "JobRun_eventId_idx" ON "JobRun" ("eventId");
- Don’t apply the Prisma migration locally yet. This is a good opportunity to test the flow.
- Manually apply the index to your database, by running the index command.
- Then locally run
pnpm run db:migrate:deploy
Before deploying
Run the index creation before deploying
CREATE INDEX CONCURRENTLY IF NOT EXISTS "JobRun_eventId_idx" ON "JobRun" ("eventId");
These commands are useful:
-- creates an index safely, this can take a long time (2 mins maybe)
CREATE INDEX CONCURRENTLY IF NOT EXISTS "JobRun_eventId_idx" ON "JobRun" ("eventId");
-- checks the status of an index
SELECT * FROM pg_stat_progress_create_index WHERE relid = '"JobRun"'::regclass;
-- checks if the index is there
SELECT * FROM pg_indexes WHERE tablename = 'JobRun' AND indexname = 'JobRun_eventId_idx';
Now, when you deploy and prisma runs the migration, it will skip the index creation because it already exists. If you don't do this, there will be pain.