PostgreSQL

Introduction

How you configure your PostgreSQL installation depends on whether you are installing Tyk from fresh using PostgreSQL, or are migrating from an existing MongoDB instance.

Supported Versions

From Tyk 4.0, you can use PostgreSQL as your datastore. We support the following versions:

• PostgreSQL version 12.x, 13.x, 14.x, 15.x, 16.x

You can also use the following as a drop in replacement for PostgreSQL:

• Amazon RDS
• Azure CosmosDB for PostgreSQL

For POC, you can also use the following as replacement:

• SQLite 3.x

Migrating from an existing MongoDB instance

For v4.0 we have provided a migration command that will help you migrate all data from the main storage layer (APIs, Policies, Users, UserGroups, Webhooks, Certificates, Portal Settings, Portal Catalogs, Portal Pages, Portal CSS etc.).

1. Make sure your new SQL platform and the existing MongoDB instance are both running
2. Configure the main part of storage section of your tyk-analytics.conf:

{
...
  "storage": {
    ...
    "main": {
      "type": "postgres",
      "connection_string": "user=root password=admin database=tyk-demo-db host=tyk-db port=5432"
    }
  }
} 

3. Run the following command:

./tyk-analytics migrate-sql

You will see output listing the transfer of each database table. For example: Migrating 'tyk_apis' collection. Records found: 7.

4. You can now remove your mongo_url (or TYK_DB_MONGOURL environment variable) from your tyk-analytics.conf
5. Restart your Tyk Dashboard

PostgreSQL sizing

The aggregate record size depends on the number of APIs and Keys you have. Each counter size ~50b, and every aggregated value has its own counter.

So an hourly aggregate record is computed like this: 50 * active_apis + 50 * api_versions + 50 * active_api_keys + 50 * oauth_keys, etc.

The average aggregate record size (created hourly) on our cloud is about ~ 40KB (a single record includes all the aggregate stats mentioned above).

So for 1 million requests per day, it will generate 1KB * 1M request stats (1GB) + 24 * 40KB aggregate stats (~1MB).

Per month: 30GB request logs + 30MB aggregate logs

PostgreSQL Database Storage Calculator

You can calculate your PostgreSQL storage requirements by entering your known values in the middle section of the calculator settings below: