fix bottleneck

server/src/repositories/job.repository.ts

@@ -2,7 +2,7 @@ import { Injectable } from '@nestjs/common';
 import { ModuleRef, Reflector } from '@nestjs/core';
 import { ClassConstructor } from 'class-transformer';
 import { Kysely, sql } from 'kysely';
-import { InjectKysely } from 'nestjs-kysely';
+import { PostgresJSDialect } from 'kysely-postgres-js';
 import { setTimeout } from 'node:timers/promises';
 import postgres from 'postgres';
 import { JobConfig } from 'src/decorators';
@@ -64,7 +64,8 @@ export class JobRepository {
   private workers: Partial<Record<QueueName, QueueWorker>> = {};
   private handlers: Partial<Record<JobName, JobMapItem>> = {};
   private writeBuffer!: WriteBuffer;
-  private writePool: postgres.Sql | null = null;
+  private pool: postgres.Sql | null = null;
+  private db!: Kysely<DB>;
   private listenConn: postgres.Sql | null = null;
   private listenReady = false;
   private pauseState: Partial<Record<QueueName, boolean>> = {};
@@ -74,7 +75,6 @@ export class JobRepository {
     private configRepository: ConfigRepository,
     private eventRepository: EventRepository,
     private logger: LoggingRepository,
-    @InjectKysely() private db: Kysely<DB>,
   ) {
     this.logger.setContext(JobRepository.name);
   }
@@ -128,8 +128,9 @@ export class JobRepository {
       }
     }
 
-    this.writePool = this.createPgConnection({ max: 4, connection: { synchronous_commit: 'off' } });
-    this.writeBuffer = new WriteBuffer(this.writePool, (queue) => this.notify(queue));
+    this.pool = this.createPgConnection({ max: 10, connection: { synchronous_commit: 'off' } });
+    this.db = new Kysely<DB>({ dialect: new PostgresJSDialect({ postgres: this.pool }) });
+    this.writeBuffer = new WriteBuffer(this.pool, (queue) => this.notify(queue));
   }
 
   async startWorkers() {
@@ -140,7 +141,7 @@ export class JobRepository {
           .updateTable(getTable(this.db, queueName))
           .set({ status: JobQueueStatus.Pending, startedAt: null, expiresAt: null })
           .where('status', '=', JobQueueStatus.Active)
-          .where('expiresAt', '<', sql<Date>`now()`)
+          .where('expiresAt', '<', sql<Date>`now()`) // needed for multi-instance safety
           .execute(),
       ),
     );
@@ -491,9 +492,9 @@ export class JobRepository {
       await this.writeBuffer.flush();
     }
 
-    if (this.writePool) {
-      await this.writePool.end();
-      this.writePool = null;
+    if (this.pool) {
+      await this.pool.end();
+      this.pool = null;
     }
     if (this.listenConn) {
       await this.listenConn.end();

server/src/services/job.service.ts

@@ -53,7 +53,7 @@ export class JobService extends BaseService {
       const response = await this.jobRepository.run(job);
       await this.eventRepository.emit('JobSuccess', { job, response });
       if (response && typeof response === 'string' && [JobStatus.Success, JobStatus.Skipped].includes(response)) {
-        await this.onDone(job);
+        void this.onDone(job).catch((error) => this.logger.error(`Failed to queue follow-up for ${job.name}: ${error}`));
       }
     } catch (error: Error | any) {
       await this.eventRepository.emit('JobError', { job, error });

server/src/utils/job-queue.util.ts

@@ -284,7 +284,7 @@ export class QueueWorker {
         expiresAt: null,
       })
       .where('status', '=', JobQueueStatus.Active)
-      .where('expiresAt', '<', sql<Date>`now()`)
+      .where('expiresAt', '<', sql<Date>`now()`) // needed for multi-instance safety
       .executeTakeFirst();
   }