Index on queue_time for job queue, limit to 10 jobs in ID query

src/repo/postgres.rs

@@ -1191,6 +1191,7 @@ impl QueueRepo for PostgresRepo {
                         .and(queue_alias.field(queue).eq(queue_name)),
                 )
                 .order(queue_alias.field(queue_time))
+                .limit(10)
                 .for_update()
                 .skip_locked()
                 .single_value();

src/repo/postgres/migrations/V0010__add_queue_time_index_to_job_queue.rs

@@ -0,0 +1,11 @@
+use barrel::backend::Pg;
+use barrel::{types, Migration};
+
+pub(crate) fn migration() -> String {
+    let mut m = Migration::new();
+
+    m.inject_custom("CREATE INDEX queue_time_index ON job_queue (queue_time);");
+    m.inject_custom("DROP INDEX queue_status_index;");
+
+    m.make::<Pg>().to_string()
+}