Reduce DB pool size, payment concurrency, and job attempts

src/modules/database/database.module.ts

@@ -16,7 +16,7 @@ import { Payment } from '../payments/entities/payment.entity';
         database: configService.get('database.database'),
         entities: [Payment],
         extra: {
-          max: 10,
+          max: 5,
           // connectionTimeoutMillis: 3000,
         },
         synchronize: false,

src/modules/payments/processor/payment.processor.ts

@@ -8,7 +8,7 @@ import { Payment } from '../entities/payment.entity';
 import { Repository } from 'typeorm';
 import { CreatePaymentDto } from '../dto/create-payment.dto';
 
-@Processor(PAYMENT_QUEUE, { concurrency: 10 })
+@Processor(PAYMENT_QUEUE, { concurrency: 5 })
 @Injectable()
 export class PaymentProcessor extends WorkerHost {
   private readonly logger = new Logger(PaymentProcessor.name);

src/modules/queue/queue.service.ts

@@ -11,7 +11,7 @@ export class QueueService {
   async addPaymentJob(data: CreatePaymentDto): Promise<void> {
     await this.paymentQueue.add(PAYMENT_QUEUE, data, {
       jobId: data.correlationId,
-      attempts: 100,
+      attempts: 90,
       backoff: {
         type: 'exponential',
         delay: 100,