Cache GraphQL Responses in Netlify Serverless Function using a Redis-based Cache

Setup

• Install netlify cli

• yarn

• Setup Redis

• Set Redis envar for connection string

• netlify init

• netlify build

• netlify dev

• netlify dev --edgeHandlers

• yarn serve

Configuration

EXPIRE_IN_SECONDS defaults to 30 seconds

Disable Cache

Set enable-response-cache request header to false

Use Insomnia

> POST /.netlify/functions/graphql HTTP/1.1
> Host: localhost:8888
> User-Agent: insomnia/2021.5.3
> Content-Type: application/json
> Accept: */*
> Content-Length: 27

| {"query":"query { quick }"}

Queries

• hi - "there"
• fast - no delay, returns current time
• quick - 3.5 seconds delay, returns current time
• slow - 7 seconds delay, returns current timex

Invalidation

Currently, ttl for all cached is 10secs.

TODO invalidate key and or on mutation

Benchmarks

brew install k6

BENCHMARK_GRAPHQL_ENDPOINT