chore: lower rds resources (#113)

* chore: lower resources for rds

* chore: minimal resources

* chore: make it a var

Author: mishraomp

backend/src/prisma.service.ts

@@ -7,9 +7,10 @@ const DB_PWD = encodeURIComponent(process.env.POSTGRES_PASSWORD || "default"); /
 const DB_PORT = process.env.POSTGRES_PORT || 5432;
 const DB_NAME = process.env.POSTGRES_DATABASE || "postgres";
 const DB_SCHEMA = process.env.POSTGRES_SCHEMA || "app";
+const DB_POOL_SIZE = parseInt(process.env.POSTGRES_POOL_SIZE || "5", 10);
 // SSL settings for PostgreSQL 17+ which requires SSL by default
 const SSL_MODE = (process.env.NODE_ENV === 'local' || 'unittest') ? 'prefer' : 'require'; // 'require' for aws deployments, 'prefer' for local development or ut in gha
-const dataSourceURL = `postgresql://${DB_USER}:${DB_PWD}@${DB_HOST}:${DB_PORT}/${DB_NAME}?schema=${DB_SCHEMA}&connection_limit=5&sslmode=${SSL_MODE}`;
+const dataSourceURL = `postgresql://${DB_USER}:${DB_PWD}@${DB_HOST}:${DB_PORT}/${DB_NAME}?schema=${DB_SCHEMA}&connection_limit=${DB_POOL_SIZE}&sslmode=${SSL_MODE}`;
 
 @Injectable({ scope:  Scope.DEFAULT})
 class PrismaService extends PrismaClient<Prisma.PrismaClientOptions, 'query'> implements OnModuleInit, OnModuleDestroy {

infrastructure/api/ecs.tf

@@ -200,6 +200,10 @@ resource "aws_ecs_task_definition" "node_api_task" {
           name  = "POSTGRES_SCHEMA"
           value = "${var.db_schema}"
         },
+        {
+          name = "POSTGRES_POOL_SIZE"
+          value = "${var.postgres_pool_size}"
+        },
         {
           name  = "PORT"
           value = "3000"

infrastructure/api/vars.tf

@@ -168,4 +168,9 @@ variable "is_public_api" {
   description = "Flag to indicate if the API is public or private"
   type        = bool
   default     = true
+}
+variable "postgres_pool_size" {
+  description = "The size of the connection pool for the API"
+  type        = string
+  default     = "1"
 }

infrastructure/database/vars.tf

@@ -38,7 +38,7 @@ variable "app_env" {
 variable "min_capacity" {
   description = "Minimum capacity for Aurora Serverless v2"
   type        = number
-  default     = 0.5
+  default     = 0
 }
 
 variable "max_capacity" {