diff --git a/src/DatabaseConnectionPoolConfiguration.php b/src/DatabaseConnectionPoolConfiguration.php
index fe5f62063455d80dbd1807be97920781871fa9dc..1681fab6da68cca735e740b40819c39f7ca6275b 100644
--- a/src/DatabaseConnectionPoolConfiguration.php
+++ b/src/DatabaseConnectionPoolConfiguration.php
@@ -20,6 +20,8 @@ readonly class DatabaseConnectionPoolConfiguration
         #[SensitiveParameter]
         public string $password,
         #[SensitiveParameter]
+        public int $poolSize,
+        #[SensitiveParameter]
         public int $port,
         #[SensitiveParameter]
         public string $username,
diff --git a/src/RedisConnectionPoolConfiguration.php b/src/RedisConnectionPoolConfiguration.php
index 9986d37ec34fe6b7c9d6568f7f75a267bfd78a10..3e56da1af42c835a4e81924b8f16f50bcb9cd9dd 100644
--- a/src/RedisConnectionPoolConfiguration.php
+++ b/src/RedisConnectionPoolConfiguration.php
@@ -16,6 +16,8 @@ readonly class RedisConnectionPoolConfiguration
         #[SensitiveParameter]
         public string $password,
         #[SensitiveParameter]
+        public int $poolSize,
+        #[SensitiveParameter]
         public int $port,
         #[SensitiveParameter]
         public string $prefix,
diff --git a/src/SingletonProvider/ConfigurationProvider/DatabaseConfigurationProvider.php b/src/SingletonProvider/ConfigurationProvider/DatabaseConfigurationProvider.php
index 3442a3ba6f2765ec06bda23582e7519c23ed424e..6312452cf71aade059a3a87d38d4d729212c8dbb 100644
--- a/src/SingletonProvider/ConfigurationProvider/DatabaseConfigurationProvider.php
+++ b/src/SingletonProvider/ConfigurationProvider/DatabaseConfigurationProvider.php
@@ -20,6 +20,7 @@ use Nette\Schema\Schema;
  *         host: string,
  *         log_queries: bool,
  *         password: string,
+ *         pool_size: int,
  *         port: int,
  *         username: string,
  *     }>
@@ -43,6 +44,7 @@ final readonly class DatabaseConfigurationProvider extends ConfigurationProvider
             'host' => Expect::string()->min(1)->required(),
             'log_queries' => Expect::bool()->required(),
             'password' => Expect::string()->required(),
+            'pool_size' => Expect::int()->min(1)->required(),
             'port' => Expect::int()->min(1)->max(65535)->required(),
             'username' => Expect::string()->min(1)->required(),
         ]);
@@ -63,6 +65,7 @@ final readonly class DatabaseConfigurationProvider extends ConfigurationProvider
                     host: $connectionPoolConfiguration->host,
                     logQueries: $connectionPoolConfiguration->log_queries,
                     password: $connectionPoolConfiguration->password,
+                    poolSize: $connectionPoolConfiguration->pool_size,
                     port: $connectionPoolConfiguration->port,
                     username: $connectionPoolConfiguration->username,
                 ),
diff --git a/src/SingletonProvider/ConfigurationProvider/RedisConfigurationProvider.php b/src/SingletonProvider/ConfigurationProvider/RedisConfigurationProvider.php
index 0261d1275745ab96826ca319285fcdb6b65284ff..fb95a12843822e53c2e044fa25097c8bc1e9a476 100644
--- a/src/SingletonProvider/ConfigurationProvider/RedisConfigurationProvider.php
+++ b/src/SingletonProvider/ConfigurationProvider/RedisConfigurationProvider.php
@@ -40,6 +40,7 @@ final readonly class RedisConfigurationProvider extends ConfigurationProvider
             'db_index' => Expect::int()->min(0)->required(),
             'host' => Expect::string()->min(1)->required(),
             'password' => Expect::string()->required(),
+            'pool_size' => Expect::int()->min(1)->required(),
             'port' => Expect::int()->min(1)->max(65535)->required(),
             'prefix' => Expect::string()->min(1)->required(),
             'timeout' => Expect::int()->min(0)->required(),
@@ -59,6 +60,7 @@ final readonly class RedisConfigurationProvider extends ConfigurationProvider
                     dbIndex: $connectionPoolConfiguration->db_index,
                     host: $connectionPoolConfiguration->host,
                     password: $connectionPoolConfiguration->password,
+                    poolSize: $connectionPoolConfiguration->pool_size,
                     port: $connectionPoolConfiguration->port,
                     prefix: $connectionPoolConfiguration->prefix,
                     timeout: $connectionPoolConfiguration->timeout,
diff --git a/src/SingletonProvider/DatabaseConnectionPoolRepositoryProvider.php b/src/SingletonProvider/DatabaseConnectionPoolRepositoryProvider.php
index 1e461b4dc939f54f9402a725ee60ce8b7a684566..ee16d39ec8930dcc3fa738d12f88ba381849edd5 100644
--- a/src/SingletonProvider/DatabaseConnectionPoolRepositoryProvider.php
+++ b/src/SingletonProvider/DatabaseConnectionPoolRepositoryProvider.php
@@ -46,10 +46,11 @@ final readonly class DatabaseConnectionPoolRepositoryProvider extends SingletonP
                     PDO::ATTR_ERRMODE => PDO::ERRMODE_SILENT,
                 ])
             ;
-            $databaseConnectionPoolRepository->databaseConnectionPool->put(
-                $name,
-                new PDOPool($pdoConfig),
-            );
+
+            $pdoPool = new PDOPool($pdoConfig, $connectionPoolConfiguration->poolSize);
+            $pdoPool->fill();
+
+            $databaseConnectionPoolRepository->databaseConnectionPool->put($name, $pdoPool);
         }
 
         return $databaseConnectionPoolRepository;
diff --git a/src/SingletonProvider/RedisConnectionPoolRepositoryProvider.php b/src/SingletonProvider/RedisConnectionPoolRepositoryProvider.php
index 48c4a74527920fa698ac271d2f2033c85435a915..7e494f5a457665794bc043d598389dc663802999 100644
--- a/src/SingletonProvider/RedisConnectionPoolRepositoryProvider.php
+++ b/src/SingletonProvider/RedisConnectionPoolRepositoryProvider.php
@@ -37,10 +37,11 @@ final readonly class RedisConnectionPoolRepositoryProvider extends SingletonProv
                 ->withDbIndex($connectionPoolConfiguration->dbIndex)
                 ->withTimeout($connectionPoolConfiguration->timeout)
             ;
-            $redisConnectionPoolRepository->redisConnectionPool->put(
-                $name,
-                new RedisPool($redisConfig),
-            );
+
+            $redisPool = new RedisPool($redisConfig, $connectionPoolConfiguration->poolSize);
+            $redisPool->fill();
+
+            $redisConnectionPoolRepository->redisConnectionPool->put($name, $redisPool);
         }
 
         return $redisConnectionPoolRepository;