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MySQL | PostgreSQL | SQL Server
As instâncias de banco de dados em execução com uma alocação de memória muito baixa ou muito alta podem ter problemas de desempenho. Às vezes, as instâncias podem ter problemas de
falta de memória (OOM).
A flag max server memory (mb)
limita a quantidade de memória que o Cloud SQL pode alocar para os pools
internos. Você pode definir manualmente um valor para essa flag ou omiti-la
e deixar o Cloud SQL gerenciar os limites de memória automaticamente.
Se você não ativar a flag, o Cloud SQL vai gerenciar automaticamente os limites de memória da instância com base no tamanho da RAM dela.
Se você ativar a flag e definir um valor manualmente e depois redimensionar a
instância, o Cloud SQL vai desativar a flag, substituir o valor
fornecido anteriormente e gerenciar automaticamente os limites de memória da instância
até que um novo valor de max server memory (mb) seja fornecido.
Valores insuficientes para a flag podem causar problemas de performance, enquanto a alocação excessiva pode levar à instabilidade, degradação da performance e falhas no banco de dados.
Recomendamos que os usuários deixem o Cloud SQL gerenciar os limites de memória da instância.
GET https://recommender.googleapis.com/v1/projects/PROJECT_ID/locations/LOCATION/recommenders/google.cloudsql.instance.PerformanceRecommender/recommendations
Substitua:
PROJECT_ID: ID do projeto;
LOCATION: uma região em que suas instâncias estão localizadas, como us-central1.
Ver insights e recomendações detalhadas
Para ver insights e recomendações detalhadas, siga estas etapas:
Console
Escolha uma destas opções:
Na página Recomendações de desempenho, clique no card Recomendações de desempenho e depois em Criar índices ou redefinir configurações de mesclagem. O painel de recomendações é exibido, contendo insights e recomendações detalhadas para a instância.
Na página Instâncias, clique em Criar índices ou redefinir configurações de mesclagem.
A lista de instâncias exibe apenas aquelas às quais a recomendação se aplica.
LOCATION: uma região em que suas instâncias estão localizadas, como us-central1.
INSIGHT_SUBTYPE: o subtipo usado para verificar se a memória alocada está muito baixa ou muito alta. Os valores aceitáveis incluem SQLSERVER_MAX_SERVER_MEMORY_TOO_LOW
e SQLSERVER_MAX_SERVER_MEMORY_TOO_HIGH.
GET https://recommender.googleapis.com/v1/projects/PROJECT_ID/locations/LOCATION/insightTypes/google.cloudsql.instance.PerformanceInsight/insights
Substitua:
PROJECT_ID: ID do projeto;
LOCATION: uma região em que suas instâncias estão localizadas, como us-central1.
Aplicar a recomendação
Console
Para implementar essa recomendação, faça o seguinte:
Localize a instância com a recomendação A memória do servidor está configurada incorretamente.
Clique na recomendação para abrir.
Na janela de recomendação, clique em Editar instância.
Na seção Flags e parâmetros, localize e exclua a flag Memória máxima do servidor (MB). A remoção da flag permite que o Cloud SQL gerencie os limites de memória da instância para você.
[[["Fácil de entender","easyToUnderstand","thumb-up"],["Meu problema foi resolvido","solvedMyProblem","thumb-up"],["Outro","otherUp","thumb-up"]],[["Difícil de entender","hardToUnderstand","thumb-down"],["Informações incorretas ou exemplo de código","incorrectInformationOrSampleCode","thumb-down"],["Não contém as informações/amostras de que eu preciso","missingTheInformationSamplesINeed","thumb-down"],["Problema na tradução","translationIssue","thumb-down"],["Outro","otherDown","thumb-down"]],["Última atualização 2025-09-04 UTC."],[],[],null,["# Optimize maximum server memory usage\n\n\u003cbr /\u003e\n\nMySQL \\| PostgreSQL \\| SQL Server\n\n\u003cbr /\u003e\n\nDatabase instances running with an allocation of memory that's either too low or\ntoo high might experience performance issues. Instances can sometimes run into\nout-of-memory (OOM) issues.\n\nThe [`max server memory (mb)`](https://learn.microsoft.com/en-us/sql/database-engine/configure-windows/server-memory-server-configuration-options)\nflag limits the amount of memory that Cloud SQL can allocate for its\ninternal pools. You can manually set a value for this flag, or omit the flag\nand let Cloud SQL manage memory limits for you automatically.\n\n- If you don't enable the flag, then Cloud SQL manages the instance's\n memory limits for you automatically, based on the size of the RAM for your\n instance.\n\n- If you enable the flag and manually set a value for it, and later resize the\n instance, then Cloud SQL disables the flag, overrides the value\n previously given, and automatically manages the memory limits of the instance\n for you until a new `max server memory (mb)` value is provided.\n\nInsufficient values for the flag can cause performance issues, while\nover-allocation can lead to instability, performance degradation, and database\ncrashes.\n\nUsers are strongly encouraged to let Cloud SQL manage the instance's\nmemory limits.\n\nFor more information, see\n[SQL Server settings](/sql/docs/sqlserver/best-practices#sqlserver_settings_global).\n\nPricing\n-------\n\nThe **Maximum server memory** recommender is in the\n*Standard* [Recommender pricing tier](/recommender/pricing).\n\nBefore you begin\n----------------\n\n[Enable the Recommender API](/recommender/docs/enabling).\n\n### Required roles and permissions\n\nTo get the permissions to view and work with insights and recommendations,\nensure that you have the required [Identity and Access Management (IAM) roles](/sql/docs/sqlserver/project-access-control#roles).\n\nFor more information about IAM roles, see [IAM basic and predefined roles reference](/iam/docs/understanding-roles) and [Manage access to projects, folders, and organizations](/iam/docs/granting-changing-revoking-access).\n\n\u003cbr /\u003e\n\nList the recommendations\n------------------------\n\nTo list the recommendations, follow these steps: \n\n### Console\n\nTo list recommendations about instance performance, 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)\n\n1. On the **Improve instance health by investigating issues and acting on\n recommendations** banner, click **Expand Details**.\n\nAlternatively, follow these steps:\n\n1. Go to the **Recommendation Hub** . See also [Find and applyrecommendations with the Recommendations](/recommender/docs/recommendation-hub/identify-configuration-problems).\n\n [Go to the Recommendation Hub](https://console.cloud.google.com/home/recommendations/)\n2. In the **All recommendations** card, click **Performance** .\n\n### gcloud\n\nRun the [`gcloud recommender recommendations list`](/sdk/gcloud/reference/recommender/recommendations/list) command as follows: \n\n```\ngcloud recommender recommendations list \\\n--project=PROJECT_ID \\\n--location=LOCATION \\\n--recommender=google.cloudsql.instance.PerformanceRecommender \\\n--filter=RECOMMENDER_SUBTYPE=SQLSERVER_USE_AUTOMATIC_MAX_SERVER_MEMORY_MANAGEMENT\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 where your instances are located, such as `us-central1`\n\n### API\n\nCall the [`recommendations.list`](/recommender/docs/reference/rest/v1/projects.locations.recommenders.recommendations/list) method as follows: \n\n```\nGET https://recommender.googleapis.com/v1/projects/PROJECT_ID/locations/LOCATION/recommenders/google.cloudsql.instance.PerformanceRecommender/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 where your instances are located, such as `us-central1`\n\nView insights and detailed recommendations\n------------------------------------------\n\nTo view insights and detailed recommendations, follow these steps: \n\n### Console\n\nDo one of the following:\n\n- On the **Performance Recommendations** page, click the **Performance\n recommendations** card and then click **Create indexes or\n reconfigure join settings**. The recommendation panel appears, which\n contains insights and detailed recommendations for the instance.\n\n- On the **Instances** page, click **Create indexes or reconfigure join settings**.\n The list of instances displays only those instances for which the\n recommendation applies.\n\n### gcloud\n\nRun the [`gcloud recommender insights list`](/sdk/gcloud/reference/recommender/insights/list) command as follows: \n\n```\n\ngcloud recommender insights list \\\n--project=PROJECT_ID \\\n--location=LOCATION \\\n--insight-type=google.cloudsql.instance.PerformanceInsight \\\n--filter=INSIGHT_SUBTYPE=INSIGHT_SUBTYPE\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 where your instances are located, such as `us-central1`\n- \u003cvar translate=\"no\"\u003eINSIGHT_SUBTYPE\u003c/var\u003e: the subtype used to verify whether allocated memory is too low or too high. Acceptable values include `SQLSERVER_MAX_SERVER_MEMORY_TOO_LOW` and `SQLSERVER_MAX_SERVER_MEMORY_TOO_HIGH`.\n\n### API\n\nCall the [`insights.list`](/recommender/docs/reference/rest/v1/projects.locations.insightTypes.insights/list) method as follows: \n\n```\n\nGET https://recommender.googleapis.com/v1/projects/PROJECT_ID/locations/LOCATION/insightTypes/google.cloudsql.instance.PerformanceInsight/insights\n\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 where your instances are located, such as `us-central1`\n\nApply the recommendation\n------------------------\n\n### Console\n\nTo implement this recommendation, do the following:\n\n- Locate the instance with the recommendation **Server memory misconfigured**.\n Click the recommendation to open it.\n\n- In the recommendation window, click **Edit instance**.\n\n- In the **Flags and parameters** section, locate and delete the\n **Max server memory (mb)** flag. Removing the flag lets Cloud SQL\n manage instance memory limits for you.\n\nWhat's next\n-----------\n\n- [Google Cloud recommenders](/recommender/docs/recommenders)"]]
