[[["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):2025-09-05。"],[],[],null,["# Google maintenance policy for Looker-hosted services\n\n| **Note:** The information on this page applies only to Looker (original) instances. For an overview of release processes for Looker (Google Cloud core), see the [Looker (Google Cloud core) release overview](/looker/docs/looker-core-release-process) documentation page.\n\nLast modified: April 1, 2021\n\nTo ensure optimal performance of the Services, Google performs periodic maintenance. During maintenance windows, your instance may be temporarily unavailable for updates, server upgrades, or other system work. Google takes system availability seriously and makes every effort to keep any interruption brief.\n\nWhile Google may perform maintenance at any time, we maintain a planned schedule for maintenance hours. The following chart specifies our planned maintenance schedule.\n\nRegular maintenance and Looker updates\n--------------------------------------\n\n### Hosts in the Americas\n\n### Hosts in Europe, the Middle East, and Africa (EMEA)\n\n### Hosts in Asia and the Pacific (APAC)\n\nPrevious versions\n-----------------\n\n[Looker-hosted maintenance hours for contracts initiated from November 2, 2020 through March 31, 2021](/looker/docs/hosted-maintenance-hours-11-02-2020)\n\n[Looker-hosted maintenance hours for contracts initiated prior to November 2, 2020](/looker/docs/hosted-maintenance-hours-04-09-2020)"]]