database: Add index to optimize background job queue processing (#11954)

Turbo87 · web-flow · commit 0238722004df · 2025-09-22T11:13:33.000Z
This commit creates a composite index on `(priority DESC, id ASC)` to improve performance of job selection queries that order by priority and id for queue processing.

This improved the job selection query performance from roughly 800ms to 0.07ms after enqueuing all of the `analyze-crate-file` backfill background jobs.
diff --git a/migrations/2025-09-22-090805_add_background_jobs_priority_id_index/down.sql b/migrations/2025-09-22-090805_add_background_jobs_priority_id_index/down.sql
@@ -0,0 +1 @@
+DROP INDEX CONCURRENTLY background_jobs_priority_id_index;
diff --git a/migrations/2025-09-22-090805_add_background_jobs_priority_id_index/metadata.toml b/migrations/2025-09-22-090805_add_background_jobs_priority_id_index/metadata.toml
@@ -0,0 +1 @@
+run_in_transaction = false
diff --git a/migrations/2025-09-22-090805_add_background_jobs_priority_id_index/up.sql b/migrations/2025-09-22-090805_add_background_jobs_priority_id_index/up.sql
@@ -0,0 +1,2 @@
+CREATE INDEX CONCURRENTLY background_jobs_priority_id_index
+    ON background_jobs (priority DESC, id ASC);

Original file line number	Diff line number	Diff line change
`@@ -0,0 +1 @@`
	`1`	`+DROP INDEX CONCURRENTLY background_jobs_priority_id_index;`
Original file line number	Diff line number	Diff line change
`@@ -0,0 +1,2 @@`
	`1`	`+CREATE INDEX CONCURRENTLY background_jobs_priority_id_index`
	`2`	`+ ON background_jobs (priority DESC, id ASC);`