feat(db): add DB_POOL_SIZE environment variable for postgres connection pool (#2990)

Author: burakemirsezen

compose.postgres.yaml

@@ -14,6 +14,7 @@ services:
       DB_NAME: 'seerr' # The name of the database to connect to
       DB_LOG_QUERIES: 'false' # Whether to log the DB queries for debugging
       DB_USE_SSL: 'false' # Whether to enable ssl for database connection
+      DB_POOL_SIZE: '10' # The number of connections to maintain in the connection pool
     volumes:
       - .:/app:rw,cached
       - /app/node_modules

docs/extending-seerr/database-config.mdx

@@ -35,6 +35,7 @@ DB_PORT="5432" # (optional) The port to connect to. The default is "5432".
 DB_USER= # (required) Username used to connect to the database.
 DB_PASS= # (required) Password of the user used to connect to the database.
 DB_NAME="seerr" # (optional) The name of the database to connect to. The default is "seerr".
+DB_POOL_SIZE="10" # (optional) The number of connections to maintain in the connection pool. The default is "10".
 DB_LOG_QUERIES="false" # (optional) Whether to log the DB queries for debugging. The default is "false".
 ```
 
@@ -48,6 +49,7 @@ DB_SOCKET_PATH="/var/run/postgresql" # (required) The path to the PostgreSQL Uni
 DB_USER= # (required) Username used to connect to the database.
 DB_PASS= # (optional) Password of the user used to connect to the database, depending on the server's authentication configuration.
 DB_NAME="seerr" # (optional) The name of the database to connect to. The default is "seerr".
+DB_POOL_SIZE="10" # (optional) The number of connections to maintain in the connection pool. The default is "10".
 DB_LOG_QUERIES="false" # (optional) Whether to log the DB queries for debugging. The default is "false".
 ```
 

server/datasource.ts

@@ -12,6 +12,15 @@ function boolFromEnv(envVar: string, defaultVal = false) {
   return defaultVal;
 }
 
+function intFromEnv(envVar: string, defaultVal?: number): number | undefined {
+  const val = process.env[envVar];
+  if (val) {
+    const parsed = parseInt(val, 10);
+    return isNaN(parsed) ? defaultVal : parsed;
+  }
+  return defaultVal;
+}
+
 function stringOrReadFileFromEnv(envVar: string): Buffer | string | undefined {
   if (process.env[envVar]) {
     return process.env[envVar];
@@ -87,6 +96,7 @@ const postgresDevConfig: DataSourceOptions = {
   password: process.env.DB_PASS,
   database: process.env.DB_NAME ?? 'seerr',
   ssl: buildSslConfig(),
+  poolSize: intFromEnv('DB_POOL_SIZE'),
   synchronize: false,
   migrationsRun: true,
   logging: boolFromEnv('DB_LOG_QUERIES'),
@@ -105,6 +115,7 @@ const postgresProdConfig: DataSourceOptions = {
   password: process.env.DB_PASS,
   database: process.env.DB_NAME ?? 'seerr',
   ssl: buildSslConfig(),
+  poolSize: intFromEnv('DB_POOL_SIZE'),
   synchronize: false,
   migrationsRun: false,
   logging: boolFromEnv('DB_LOG_QUERIES'),