Don't use Redis logical databases

config/services.php

@@ -155,7 +155,7 @@ return [
             $cacheInterface = new Symfony\Component\Cache\Adapter\ArrayAdapter();
         } elseif ($redisFactory->isSupported()) {
             $cacheInterface = new Symfony\Component\Cache\Adapter\RedisAdapter(
-                $redisFactory->createInstance(),
+                $redisFactory->getInstance(),
                 marshaller: new Symfony\Component\Cache\Marshaller\DefaultMarshaller(
                     $environment->isProduction() ? null : false
                 )
@@ -190,7 +190,7 @@ return [
         Environment $environment,
         App\Service\RedisFactory $redisFactory
     ) => ($redisFactory->isSupported())
-        ? new Symfony\Component\Lock\Store\RedisStore($redisFactory->createInstance())
+        ? new Symfony\Component\Lock\Store\RedisStore($redisFactory->getInstance())
         : new Symfony\Component\Lock\Store\FlockStore($environment->getTempDirectory()),
 
     // Console

src/Environment.php

@@ -71,7 +71,6 @@ final class Environment
     public const ENABLE_REDIS = 'ENABLE_REDIS';
     public const REDIS_HOST = 'REDIS_HOST';
     public const REDIS_PORT = 'REDIS_PORT';
-    public const REDIS_DB = 'REDIS_DB';
 
     public function __construct(array $elements = [])
     {
@@ -368,7 +367,6 @@ final class Environment
      * @return array{
      *     host: string,
      *     port: int,
-     *     db: int,
      *     socket?: string
      * }
      */
@@ -384,10 +382,6 @@ final class Environment
                 $this->data[self::REDIS_PORT] ?? null,
                 6379
             ),
-            'db' => Types::int(
-                $this->data[self::REDIS_DB] ?? null,
-                1
-            ),
         ];
 
         if ('localhost' === $redisSettings['host'] && $this->isDocker()) {

src/Installer/EnvFiles/AzuraCastEnvFile.php

@@ -182,12 +182,6 @@ final class AzuraCastEnvFile extends AbstractEnvFile
                     'default' => $redisSettings['port'],
                     'required' => true,
                 ],
-                Environment::REDIS_DB => [
-                    'name' => __('Redis Database Index'),
-                    'options' => range(0, 15),
-                    'default' => $redisSettings['db'],
-                    'required' => true,
-                ],
                 'PHP_MAX_FILE_SIZE' => [
                     'name' => __('PHP Maximum POST File Size'),
                     'default' => '25M',

src/MessageQueue/QueueManager.php

@@ -57,7 +57,7 @@ final class QueueManager extends AbstractQueueManager
                     'redeliver_timeout' => 43200,
                     'claim_interval' => 86400,
                 ],
-                $this->redisFactory->createInstance()
+                $this->redisFactory->getInstance()
             );
         }
 

src/Service/RedisFactory.php

@@ -12,27 +12,30 @@ final class RedisFactory
 {
     use EnvironmentAwareTrait;
 
+    protected ?Redis $instance = null;
+
     public function isSupported(): bool
     {
         return !$this->environment->isTesting() && $this->environment->enableRedis();
     }
 
-    public function createInstance(): Redis
+    public function getInstance(): Redis
     {
         if (!$this->isSupported()) {
             throw new RuntimeException('Redis is disabled on this installation.');
         }
 
-        $settings = $this->environment->getRedisSettings();
+        if (null === $this->instance) {
+            $settings = $this->environment->getRedisSettings();
 
-        $redis = new Redis();
+            $this->instance = new Redis();
-        if (isset($settings['socket'])) {
+            if (isset($settings['socket'])) {
-            $redis->connect($settings['socket']);
+                $this->instance->connect($settings['socket']);
-        } else {
+            } else {
-            $redis->connect($settings['host'], $settings['port'], 15);
+                $this->instance->connect($settings['host'], $settings['port'], 15);
+            }
         }
-        $redis->select($settings['db']);
 
-        return $redis;
+        return $this->instance;
     }
 }