We also recommend the value for the work_mem be set to at least 16384 to help avoid performance issues.įor more information and a full list of PostgreSQL Parameters, see Working with PostgreSQL Parameters (Link opens in a new window) on the AWS site. You can modify the parameter values if you have specific performance or logging requirements, but we strongly recommend that the following parameters be left to default values and not be changed: When you create a DB instance, the parameters in the associated DB parameter group are loaded.įrom the Tableau Server perspective, most of the parameters can be set to defaults. PostgreSQL parameters that you set for a local PostgreSQL instance in the nf file are maintained in the DB parameter group for your DB instance. If you specify a policy that includes character types other than numbers and lower-case letters, this can cause errors while configuring Tableau Server to use the external repository.Ĭreate a PostgreSQL DB instance on Amazon RDS Step 1: Create a parameter group Your external PostgreSQL instance may allow you to set a password policy (this will depend on the platform you are using). They cannot be accessed or configured by an admin. These passwords are 32 characters long and consist of lower-case letters and numbers. Tableau auto-generates passwords for internal use by internal database users. Tableau Server 2020.4 uses PostgreSQL version 12. The version of PostgreSQL should match the version used by Tableau Server when installed locally. One of the ways you can do this is by making the PostgreSQL DB instance a member of a security group that has the necessary permissions to be accessed by all the nodes in the Tableau Server cluster. The PostgreSQL DB instance must be reachable by all nodes in the Tableau Server cluster. Secure communication between Tableau Server and the external PostgreSQL DB instance using SSL connections is not required but recommended. For more information, see Upgrading your RDS Instance. You can start with a smaller instance type and if you find later that you need a larger instance type, you can upgrade your existing RDS instance. We recommend using 16 vCPUs and 128 GB RAM Amazon RDS memory optimised instance types for good performance. This is the minimum recommended AWS RDS instance size to use for Tableau Server external repository, but the exact requirements will vary with your requirements and usage. Requirements and RecommendationsĪt a minimum, use an instance with 8vCPUs and 32 GB RAM. To see a full list of hosts that you can use for the your external repository, see Tableau Server External Repository. This topic describes how to create a AWS RDS PostgreSQL DB instance to use as your Tableau Server external repository. With Trusted Language Extensions (TLE) for PostgreSQL, you can build high performance extensions and safely run them on Amazon RDS using popular trusted languages without needing AWS to certify code.Beginning in version 2019.3, you can host your External Repository on the AWS Cloud Platform. Amazon RDS for PostgreSQL currently supports PostgreSQL 9.6, 10, 11, 12, 13, 14, and 15. This means that the code, applications, and tools you already use today with your existing databases can be used with Amazon RDS. Amazon RDS manages complex and time-consuming administrative tasks such as PostgreSQL software installation and upgrades, storage management, replication for high availability and read throughput, and backups for disaster recovery.Īmazon RDS for PostgreSQL gives you access to the capabilities of the familiar PostgreSQL database engine. With Amazon RDS, you can deploy scalable PostgreSQL deployments in minutes with cost-efficient and resizable hardware capacity. Amazon RDS makes it easier to set up, operate, and scale PostgreSQL deployments on the cloud. PostgreSQL has become the preferred open source relational database for many enterprise developers and startups, powering leading business and mobile applications.
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