Cloud Composer 環境では、Airflow スケジューラと Airflow ウェブサーバーの両方が DAG を継続的に処理します。DAG のシリアル化を有効にすると、Airflow ウェブサーバーの信頼性とパフォーマンスを向上させることができます。
DAG のシリアル化を有効にすると、ウェブサーバーに送信する前に DAG ファイルをスケジューラに処理させます。ウェブサーバーは DAG を処理しません。代わりに、シリアル化された DAG を Airflow データベースから読み取ります。このようにして DAG をシリアル化すると、特に多数の DAG を処理する場合に、ウェブサーバーによる CPU とメモリ使用量が削減されます。
[[["わかりやすい","easyToUnderstand","thumb-up"],["問題の解決に役立った","solvedMyProblem","thumb-up"],["その他","otherUp","thumb-up"]],[["わかりにくい","hardToUnderstand","thumb-down"],["情報またはサンプルコードが不正確","incorrectInformationOrSampleCode","thumb-down"],["必要な情報 / サンプルがない","missingTheInformationSamplesINeed","thumb-down"],["翻訳に関する問題","translationIssue","thumb-down"],["その他","otherDown","thumb-down"]],["最終更新日 2025-08-29 UTC。"],[[["\u003cp\u003eDAG serialization in Cloud Composer improves the reliability and performance of the Airflow web server by having the scheduler process DAG files before they are sent, reducing the web server's CPU and memory usage.\u003c/p\u003e\n"],["\u003cp\u003eStarting with Cloud Composer version 1.15.0, DAG serialization is enabled by default, and it can be managed by overriding Airflow configuration options in both new and existing environments.\u003c/p\u003e\n"],["\u003cp\u003eEnabling DAG serialization requires setting the \u003ccode\u003estore_serialized_dags\u003c/code\u003e and \u003ccode\u003estore_dag_code\u003c/code\u003e Airflow configuration options to \u003ccode\u003eTrue\u003c/code\u003e, along with recommended settings of \u003ccode\u003e30\u003c/code\u003e for both \u003ccode\u003emin_serialized_dag_update_interval\u003c/code\u003e and \u003ccode\u003edag_dir_list_interval\u003c/code\u003e.\u003c/p\u003e\n"],["\u003cp\u003eDisabling DAG serialization involves overriding the \u003ccode\u003estore_serialized_dags\u003c/code\u003e and \u003ccode\u003estore_dag_code\u003c/code\u003e Airflow configuration options and setting them to \u003ccode\u003eFalse\u003c/code\u003e.\u003c/p\u003e\n"],["\u003cp\u003eDAG serialization is incompatible with asynchronous DAG loading and will disable all Airflow web server plugins, although scheduler and worker plugins remain unaffected.\u003c/p\u003e\n"]]],[],null,["\u003cbr /\u003e\n\n\u003cbr /\u003e\n\n\u003cbr /\u003e\n\n\nCloud Composer 3 \\| Cloud Composer 2 \\| **Cloud Composer 1**\n\n\u003cbr /\u003e\n\nFollow the instructions on this page to enable or disable DAG serialization.\n\nIn a Cloud Composer environment, both the Airflow scheduler and\nthe Airflow web server continuously process DAGs. You can improve\nthe reliability and performance of the Airflow web server by enabling\n[DAG serialization](https://airflow.apache.org/docs/apache-airflow/stable/dag-serialization.html).\n\nEnabling DAG serialization forces the scheduler to process DAG files\nbefore they are sent to the web server. The web server does not process DAGs.\nInstead, it reads the serialized DAGs from the Airflow database. Serializing\nDAGs in this way reduces the CPU and memory usage of the web server,\nespecially when processing a large number of DAGs.\n\nBefore you begin **Note:** Starting from Cloud Composer version **1.15.0** , DAG serialization is enabled by default. You can enable and disable DAG serialization in new and existing environments by [overriding Airflow configuration options](/composer/docs/composer-2/override-airflow-configurations), as described in the following sections.\n\nDAG serialization affects the following Cloud Composer features:\n\n- DAG serialization cannot be enabled at the same time as [asynchronous DAG loading](/composer/docs/composer-2/access-airflow-web-interface#asynchronous-load).\n- Enabling DAG serialization disables all Airflow web server plugins for Cloud Composer. This does not impact scheduler or worker plugins, including Airflow operators, sensors, and so on.\n\nEnabling DAG serialization\n\nYou can enable DAG serialization for an existing environment or when creating a\nnew environment.\n| **Note:** Do not apply these settings to environments running Airflow 2.x. The DAG serialization and storing DAG code in Airflow Metadata Database is by default turned on in Airflow 2.x and you cannot switch it on or off.\n\nTo enable DAG serialization,\n[override](/composer/docs/composer-2/override-airflow-configurations) the following Airflow configuration options:\n\n| Section | Key | Value |\n|-------------|--------------------------------------|--------|\n| `core` | `store_serialized_dags` | `True` |\n| `core` | `store_dag_code` | `True` |\n| `core` | `min_serialized_dag_update_interval` | `30` |\n| `scheduler` | `dag_dir_list_interval` | `30` |\n\nThe [`min_serialized_dag_update_interval`](https://airflow.apache.org/docs/stable/configurations-ref.html#min-serialized-dag-update-interval)\nAirflow configuration option controls how frequently serialized DAGs\nare updated in the database.\nThe [`dag_dir_list_interval`](https://airflow.apache.org/docs/stable/configurations-ref.html#dag-dir-list-interval)\noption controls how frequently removed DAGs are deleted from the Airflow\ndatabase. A high update frequency can negatively impact performance. We\nrecommend setting `min_serialized_dag_update_interval` and\n`dag_dir_list_interval` to 30 seconds.\n\nDisabling DAG serialization\n\nYou can enable DAG serialization for an existing environment or when creating\na new environment.\n\nTo disable DAG serialization, [override](/composer/docs/composer-2/override-airflow-configurations) the following Airflow\nconfiguration options:\n\n| Section | Key | Value |\n|---------|-------------------------|---------|\n| `core` | `store_serialized_dags` | `False` |\n| `core` | `store_dag_code` | `False` |"]]
