GET https://recommender.googleapis.com/v1beta1/projects/PROJECT-ID/locations/LOCATION/recommenders/google.cloudsql.instance.PerformanceRecommender.MySqlHighNumberOfTablesBestPractice/recommendations
GET https://recommender.googleapis.com/v1beta1/projects/PROJECT-ID/locations/LOCATION/insightTypes/google.cloudsql.instance.PerformanceRecommender.MySqlHighNumberOfTables/insights
请替换以下内容:
PROJECT_ID:您的项目 ID。
LOCATION:区域,例如 us-central1。
下表列出了 Cloud SQL 大量打开的表 Recommender 生成的数据分析和建议,以帮助您提高性能。gcloud CLI 和 API 结果中显示子类型。
[[["易于理解","easyToUnderstand","thumb-up"],["解决了我的问题","solvedMyProblem","thumb-up"],["其他","otherUp","thumb-up"]],[["很难理解","hardToUnderstand","thumb-down"],["信息或示例代码不正确","incorrectInformationOrSampleCode","thumb-down"],["没有我需要的信息/示例","missingTheInformationSamplesINeed","thumb-down"],["翻译问题","translationIssue","thumb-down"],["其他","otherDown","thumb-down"]],["最后更新时间 (UTC):2025-09-04。"],[],[],null,["# Manage high number of tables\n\n\u003cbr /\u003e\n\nMySQL \\| PostgreSQL \\| SQL Server\n\n\u003cbr /\u003e\n\n\u003cbr /\u003e\n\n|\n| **Preview**\n|\n|\n| This feature is subject to the \"Pre-GA Offerings Terms\" in the General Service Terms section\n| of the [Service Specific Terms](/terms/service-terms#1).\n|\n| Pre-GA features are available \"as is\" and might have limited support.\n|\n| For more information, see the\n| [launch stage descriptions](/products#product-launch-stages).\n\nThe Cloud SQL high-number-of-tables [recommender](/recommender/docs/overview) helps you detect instances\nwhose table count is too high and close to the SLA limit. It then provides recommendations\non how to optimize such instances and improve instance performance.\n\nThis page describes how the high-number-of-tables recommender works and how\nyou can use it.\n\nHow it works\n------------\n\nIf you have 50,000 or more database tables on a single instance, it could result\nin the instance becoming unresponsive or unable to perform maintenance operations,\nand the instance is not covered by the SLA.\n\nThe Cloud SQL high-number-of-tables recommender analyzes metrics for the number\nof tables on a Cloud SQL MySQL instance. If the number of tables is larger than or\nequal to 80% of the SLA limit, which allows for 50,000 tables, the instance is considered\nto have a high number of tables.\n| **Note:** Recommendations are generated daily.\n\nPricing\n-------\n\nThe Cloud SQL high-number-of-open-tables recommender is in the *Standard* [Recommender pricing tier](/recommender/pricing).\n\nBefore you begin\n----------------\n\nBefore you can view recommendations and insights, do the following:\n\n- To get the permissions to view and work with insights and recommendations, ensure that you have the required [roles](/sql/docs/mysql/project-access-control#roles).\n\n For more information about roles, see [understanding roles](/iam/docs/understanding-roles) and [granting IAM permissions](/iam/docs/granting-changing-revoking-access).\n-\n\n\n Enable the Recommender API.\n\n\n [Enable the API](https://console.cloud.google.com/flows/enableapi?apiid=recommender.googleapis.com)\n\nList Improve Instance Performance recommendations\n-------------------------------------------------\n\nYou can list the Improve Instance Performance recommendations by\nusing the Google Cloud console, [gcloud CLI](/sdk/gcloud), or the Recommender API.\n\nThe improve instance performance recommendations are shown only if you have instances that\nare nearing performance threshold limits. \n\n### Console\n\nTo list recommendations about instance performance by using the\nGoogle Cloud console, follow these steps:\n\n1. Go to the **Cloud SQL Instances** page.\n\n [Go to Cloud SQL Instances](https://console.cloud.google.com/sql/instances)\n2. Click **View all** on the Manage high number of tables recommendations banner.\n\nAlternatively, follow these steps:\n\n1. Go to the **Recommendation Hub** . See also [Getting started with Recommendation Hub](/recommender/docs/recommendation-hub/identify-configuration-problems).\n\n [Go to the Recommendation Hub](https://console.cloud.google.com/home/recommendations/)\n2. In the **Improve Cloud SQL Instance Performance** card, click **View all**.\n\n3. Select the instances with **Manage high number of tables** recommendation.\n\n### gcloud CLI\n\nTo list Improve Instance Performance recommendations by using `gcloud CLI`, run the\n[`gcloud recommender recommendations list`](/sdk/gcloud/reference/recommender/recommendations/list)\ncommand as follows: \n\n```\ngcloud recommender recommendations list \\\n--project=PROJECT_ID \\\n--location=LOCATION \\\n--recommender=google.cloudsql.instance.PerformanceRecommender \\\n--filter=recommenderSubtype=MYSQL_HIGH_NUMBER_OF_TABLES_BEST_PRACTICE\n```\n\nReplace the following:\n\n- \u003cvar translate=\"no\"\u003ePROJECT_ID\u003c/var\u003e: Your project ID\n- \u003cvar translate=\"no\"\u003eLOCATION\u003c/var\u003e: A region, such as `us-central1`\n\n### API\n\nTo list Improve Instance Performance recommendations by using the\n[Recommendations API](/recommender/docs/using-api), call the\n[`recommendations.list`](/recommender/docs/reference/rest/v1beta1/projects.locations.recommenders.recommendations/list)\nmethod as follows: \n\n```\nGET https://recommender.googleapis.com/v1beta1/projects/PROJECT-ID/locations/LOCATION/recommenders/google.cloudsql.instance.PerformanceRecommender.MySqlHighNumberOfTablesBestPractice/recommendations\n```\n\nReplace the following:\n\n- \u003cvar translate=\"no\"\u003ePROJECT_ID\u003c/var\u003e: Your project ID.\n- \u003cvar translate=\"no\"\u003eLOCATION\u003c/var\u003e: A region, such as `us-central1`.\n\nIf the recommender detects instances with high number of tables, it lists them in a\ntable with other performance recommendations.\nEach row shows the instance ID, a brief recommendation, database engine, the location, and the last refresh date.\n\nView insights and detailed recommendations\n------------------------------------------\n\nYou can view insights and detailed recommendations about instances\nthat have a high number of tables by using the Google Cloud console,\n`gcloud CLI`, or the Recommender API. \n\n### Console\n\nTo view insights and detailed recommendations about instances that are close to the performance threshold by using the Google Cloud console, click the recommendation\nlink in the list of instances.\n\n### gcloud CLI\n\nTo view insights and detailed recommendations about instances that are close to the performance threshold by using `gcloud CLI`, run the\n[`gcloud recommender insights list`](/sdk/gcloud/reference/recommender/insights/list)\ncommand as follows: \n\n```\ngcloud recommender insights list \\\n--project=PROJECT_ID \\\n--location=LOCATION \\\n--insight-type=google.cloudsql.instance.PerformanceInsight \\\n--filter=insightSubtype=MYSQL_HIGH_NUMBER_OF_TABLES\n```\n\nReplace the following:\n\n- \u003cvar translate=\"no\"\u003ePROJECT_ID\u003c/var\u003e: Your project ID.\n- \u003cvar translate=\"no\"\u003eLOCATION\u003c/var\u003e: A region, such as `us-central1`.\n\n### API\n\nTo view insights and detailed recommendations about instances that are close to the performance threshold\nby using the [Recommendations API](/recommender/docs/using-api),\ncall the [`insights.list`](/recommender/docs/reference/rest/v1beta1/projects.locations.insightTypes.insights/list)\nmethod as follows: \n\n```\nGET https://recommender.googleapis.com/v1beta1/projects/PROJECT-ID/locations/LOCATION/insightTypes/google.cloudsql.instance.PerformanceRecommender.MySqlHighNumberOfTables/insights\n```\n\nReplace the following:\n\n- \u003cvar translate=\"no\"\u003ePROJECT_ID\u003c/var\u003e: Your project ID.\n- \u003cvar translate=\"no\"\u003eLOCATION\u003c/var\u003e: A region, such as `us-central1`.\n\nThe following table lists the insight and recommendation that the Cloud SQL\nhigh-number-of-open-tables recommender generates to help you improve performance.\nThe subtypes are visible in the `gcloud CLI` and API results.\n\nApply recommendations\n---------------------\n\nEvaluate the recommendations carefully and do any of the following:\n\n- To examine the instance, click **View instance** . See [Optimize the performance of your instance](#optimize-performance)\n and follow the recommendations.\n\n- To dismiss the recommendation so that it's de-emphasized and appears dimmed,\n click **Dismiss**.\n\n- To close the panel without applying or dismissing the recommendation, click\n **Cancel**.\n\n### Optimize the performance of your instance\n\n- [Edit](/sql/docs/mysql/edit-instance) your instance to increase the number of vCPUs\n to at least 32 cores and the memory size to at least 200 GB.\n This increases the instance's [table limit](/sql/docs/mysql/quotas#table_limit) from 50,000 to 500,000.\n\n | **Caution:** This operation can lead to an increase in cost. Additionally, it triggers a restart, which can cause downtime on the instance.\n- Drop unnecessary tables:\n\n ```\n DROP TABLE TABLE_NAME; \n ```\n\n Replace the following:\n - \u003cvar translate=\"no\"\u003eTABLE_NAME\u003c/var\u003e: Name of the table you intend to drop.\n- Reduce the number of tables per instance by splitting the database across multiple instances to keep the number of tables in each\n instance within the recommended limits.\n\n- If you cannot immediately reduce the number of tables, you can reduce the likelihood\n of your instance being impacted by the high table\n count by setting the `innodb_file_per_table` flag to OFF. To turn off the value of\n the `innodb_file_per_table` flag, see [Configure a database flag](/sql/docs/mysql/flags?hl=en#config).\n However, this setting does not bring the instance back into SLA compliance.\n See these [operational guidelines](/sql/docs/mysql/operational-guidelines?hl=en#tables).\n\n- Use a general tablespace to create tables or move existing tables to a general tablespace.\n To learn more, see [MySQL documentation on general tablespaces](https://dev.mysql.com/doc/refman/8.0/en/general-tablespaces.html).\n\nWhat's next\n-----------\n\n- [Increase the table open cache size](/sql/docs/mysql/recommender-high-number-of-open-tables)\n- [Monitor disk availability](/sql/docs/mysql/using-ood-recommender)\n- [Identify idle Cloud SQL instances](/sql/docs/mysql/recommender-sql-idle)\n- [Reduce overprovisioned Cloud SQL instances](/sql/docs/mysql/recommender-sql-overprovisioned)\n- Explore [Google Cloud recommenders](/recommender/docs/recommenders)"]]