[[["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):2025-08-27。"],[],[],null,["# Spanner free trial instances overview\n\n| **Note:** A Spanner free trial instance supports Standard edition features, and Enterprise edition features, such as [KNN](/spanner/docs/find-k-nearest-neighbors), [ANN vector distance functions](/spanner/docs/find-approximate-nearest-neighbors), [full-text search](/spanner/docs/full-text-search), and [Spanner Graph](/spanner/docs/graph/overview). For more information, see the [Spanner editions overview](/spanner/docs/editions-overview).\n\nThis page provides an overview of Spanner free trial instances.\n\nA Spanner free trial instance lets you learn and explore\nSpanner features and capabilities at no cost for up to 90 days.\nUsing a Spanner free trial instance, you can create\nGoogleSQL or PostgreSQL-dialect databases and store up to\n10 GB of data to test out key Spanner features, and learn key\nSpanner concepts.\n\nYou can\n[create a Spanner free trial instance](/spanner/docs/free-trial-quickstart#create)\nusing the Google Cloud console or Google Cloud CLI.\n\nExplore sample databases and applications\n-----------------------------------------\n\nWhen you create the free trial instance using the Google Cloud console,\nSpanner creates and preloads a sample database for an ecommerce\nstore in the free trial instance. The sample database schema defines entities\nfor users, products, orders, shopping carts, order items, addresses, and\npayments. Spanner inserts sample data into the ecommerce\ndatabase. You can view saved queries on the Spanner Studio page for the\nsample database that help showcase the following Spanner\ncapabilities:\n\n- The relational model\n- Full-text search\n- Vector search for product similarity\n- Graph relationships between entities such as users, orders, and products\n\nYou can also create new databases, define schema, and load data in the\nfree trial instance. To learn more, see\n[Create a Spanner free trial instance and sample application](/spanner/docs/free-trial-quickstart).\n\nIn addition to the ecommerce use case database, Spanner offers an\nopen source [sample application](https://github.com/GoogleCloudPlatform/cloud-spanner-samples)\nto help you get started with the Spanner free trial instance. The\nsample application includes a backend gRPC service backed by a Spanner\ndatabase and a workload generator that drives traffic to the service.\n\nCost and eligibility\n--------------------\n\nA Spanner free trial instance is available at no cost to both\nexisting and new Google Cloud customers. If you're a new Google Cloud customer,\nyou might also be eligible for the\n[Google Cloud 90-day, $300 Free Trial](/free/docs/free-cloud-features#free-trial)\nthat offers $300 in free Cloud Billing credits to pay for any Google Cloud\nresources. The Spanner free trial instance is in\naddition to the $300 Free Trial credits offered by the Google Cloud Free Trial,\nand you don't need to use any free Cloud Billing credits to create a\nfree trial instance.\n\nFor more information about the Spanner free trial instance, see\nthe following table:\n\nLimitations\n-----------\n\nThe free trial instance is subject to the following limitations:\n\n- One free trial instance allowed per project lifecycle.\n- Maximum five free trial instances allowed per Cloud Billing account.\n- Maximum five databases allowed per free trial instance.\n- 90-day free trial instance period provided.\n- No [SLA](/spanner/sla) guarantees provided.\n- All Spanner [quotas and limits](/spanner/quotas) apply.\n- One free trial instance provides 10 GB of storage capacity and limited [compute capacity](/spanner/docs/compute-capacity) required for learning purposes. You can't edit a free trial instance to increase its storage or compute capacity limits. You can increase the storage and compute capacity of a free trial instance by [upgrading to a paid instance](/spanner/docs/free-trial-instance#upgrade).\n- Free trial instances don't support [backup and restore](/spanner/docs/backup).\n- Free trial instances don't support [customer-managed encryption keys (CMEK)](/spanner/docs/cmek).\n- Spanner free trial instances are available in all [regional configurations](/spanner/docs/instance-configurations#available-configurations-regional). They aren't available in [dual-region](/spanner/docs/instance-configurations#dual-region-configurations) or [multi-region configurations](/spanner/docs/instance-configurations#multi-region-configurations).\n\nThe free trial instance is meant for evaluation purposes. It is not meant for\nthe following use cases:\n\n- Production related activities\n- Performance evaluation and load testing of Spanner\n- Ongoing testing and development\n\nPerformance\n-----------\n\n| **Note:** These performance numbers are estimates only. Spanner performance is highly dependent on workload, schema design, and dataset characteristics.\n\nA Spanner free trial instance can provide around 500 queries\nper second (QPS) of reads or 100 QPS of writes (writing single rows at 1 KB of\ndata per row) when you follow these best practices:\n\n- [Design a schema](/spanner/docs/schema-design) that prevents hotspots and other performance issues.\n- [Write efficient queries](/spanner/docs/sql-best-practices) and follow other SQL best practices.\n- Keep high priority [total CPU utilization under 65%](/spanner/docs/cpu-utilization#recommended-max) as recommended.\n- Place compute resources within the same region as your Spanner instance, for optimal read and write latency.\n\nYou can monitor and optimize the performance of your free trial instance with\nthe help of:\n\n- [Monitoring charts and metrics](/spanner/docs/monitoring-console#charts-metrics)\n- [Query Insights](/spanner/docs/using-query-insights)\n- [Query plan visualizer](/spanner/docs/tune-query-with-visualizer)\n- [Introspection tools](/spanner/docs/introspection)\n- [Spanner Key Visualizer](/spanner/docs/key-visualizer)\n\nFor better performance, upgrade your free trial instance to a paid instance\nand scale up the [compute capacity](/spanner/docs/compute-capacity) of your\ninstance.\n\nUpgrade from free trial instances\n---------------------------------\n\nYou can upgrade your Spanner free trial instance to a paid\nEnterprise edition instance anytime during the 90-day\nfree trial instance period without any downtime. You aren't charged unless you\nexplicitly upgrade your free trial instance to a paid instance.\n\nUpgrading your Spanner free trial instance has the\nfollowing benefits:\n\n- Keeps your Spanner free trial instance running uninterrupted beyond the 90-day free trial period.\n- Gives you access to Spanner features that aren't available in the free trial instance, such as backups and managed autoscaler. You can also upgrade to the Enterprise Plus edition for additional features, such as geo-partitioning and multi-regional configurations with 99.999% availability.\n- Lets you increase the compute capacity of your instance and obtain higher performance (QPS, throughput) and storage capacity (greater than 10 GB).\n\nAs an option, you can opt in to automatically upgrade your free trial instance\nto a paid Enterprise edition instance after 90 days. For more\ninformation, see [Upgrade free trial instance](/spanner/docs/free-trial-quickstart#upgrade).\n\nIf don't want to use the Enterprise edition, upgrade your\nfree trial instance to the paid Enterprise edition first. Then, you\ncan upgrade your instance to the Enterprise Plus edition, or contact\nsupport to downgrade to the Standard edition. For more information,\nsee the [Spanner editions overview](/spanner/docs/editions-overview).\n\nTroubleshooting FAQs\n--------------------\n\nWhy can't I create a free trial instance in my project?\n: You can create one free trial instance per project. If you've already\n created a free trial instance in your project, you can't create\n another one.\n\nWhy can't I create a free trial instance in instance configuration X?\n: Spanner free trial instances are available in all\n [regional configurations](/spanner/docs/instance-configurations#available-configurations-regional). They aren't available in\n [dual-region](/spanner/docs/instance-configurations#dual-region-configurations) or [multi-region configurations](/spanner/docs/instance-configurations#multi-region-configurations).\n\nHow can I create more than five databases in a free trial instance?\n: If you want to create more than five databases, upgrade your\n free trial instance to a paid instance.\n\nMy free trial instance has been disabled. How can I re-enable it?\n: If you've completed the Spanner 90-day free trial period, the\n free trial instance is disabled and enters a 30-day grace period. You can\n start using your instance again by [upgrading your free trial instance to\n a paid instance](/spanner/docs/free-trial-quickstart#upgrade) during the\n 90-day trial period or the 30-day grace period.\n\nSupport\n-------\n\nTo get support for your Spanner instance, you can:\n\n- Get a Google support package\n- Ask a question on Stack Overflow\n- Join online help communities\n- File a bug or feature request\n\nFor more information, see [Get support](/spanner/docs/getting-support).\n\nWhat's next\n-----------\n\n- Learn more about [Spanner editions](/spanner/docs/editions-overview).\n- Learn more about how to [get started with a free trial instance and sample\n application](/spanner/docs/free-trial-quickstart).\n- Learn more about Spanner [quotas and limits](/spanner/quotas).\n- Learn more about Spanner [instances](/spanner/docs/instances) and [databases](/spanner/docs/databases).\n- For details on Spanner pricing after the free trial period, see the [Pricing page](/spanner/pricing)."]]