fix: maintain connections pool (#8670)

packages/core/medusa-test-utils/src/database.ts

@@ -30,6 +30,9 @@ export function getMikroOrmConfig({
     entities: Object.values(mikroOrmEntities),
     schema: schema ?? process.env.MEDUSA_DB_SCHEMA,
     debug: false,
+    pool: {
+      min: 2,
+    },
     migrations: {
       pathTs: pathToMigrations,
       silent: true,

packages/core/utils/src/dal/mikro-orm/mikro-orm-create-connection.ts

@@ -93,6 +93,9 @@ export async function mikroOrmCreateConnection(
     schemaGenerator: {
       disableForeignKeys: false,
     },
-    pool: database.pool as any,
+    pool: {
+      min: 2,
+      ...database.pool,
+    },
   })
 }

packages/core/utils/src/modules-sdk/create-pg-connection.ts

@@ -27,7 +27,7 @@ export function createPgConnection(options: Options) {
     pool: {
       // https://knexjs.org/guide/#pool
       ...(pool ?? {}),
-      min: (pool?.min as number) ?? 0,
+      min: (pool?.min as number) ?? 2,
     },
   })
 }

packages/framework/framework/src/database/pg-connection-loader.ts

@@ -23,6 +23,7 @@ export function pgConnectionLoader(): ReturnType<
     configModule.projectConfig.databaseDriverOptions || {}
   const schema = configModule.projectConfig.databaseSchema || "public"
   const idleTimeoutMillis = driverOptions.pool?.idleTimeoutMillis ?? undefined // prevent null to be passed
+  const poolMin = driverOptions.pool?.min ?? 2
   const poolMax = driverOptions.pool?.max
 
   delete driverOptions.pool
@@ -32,6 +33,7 @@ export function pgConnectionLoader(): ReturnType<
     schema,
     driverOptions,
     pool: {
+      min: poolMin,
       max: poolMax,
       idleTimeoutMillis,
     },