How to inspect Redis with Redis Insight

Redis Insight is a free desktop tool for browsing Redis and analyzing what uses memory - useful when a cache is large or you are chasing memory pressure. You connect to your host's Redis over a secure Secure Shell (SSH) tunnel.

Before you start

• SSH access and your system-user credentials from the host's Credentials tab.

• No Redis password is needed. Access is secured by the SSH tunnel and by Redis binding to localhost, so leave the password field empty.

Connect

1. In Redis Insight, select Add Redis Database.
2. Enter the connection details:

   • Host: 127.0.0.1 and Port: 6379 (the cache instance) or 6378 (the persistent instance).

   • Under Security, enable Use SSH Tunnel: SSH host = your server, port 22, and your system-user name and password.

3. Open the database. Pick the logical database to analyze (the default is 0); you can list them over SSH with:

   redis-cli info keyspace

Which instance and database

TurboStack runs two Redis instances. Connect to the one that holds the data you want to inspect:

Instance	Port	Holds
Cache	6379	Temporary cache; cleared by tscli redis clear
Persistent	6378	Sessions and data that must survive a restart

Each instance has 16 logical databases, numbered 0 to 15. When a host runs several sites, each site often uses its own database. Use the keyspace list above to find the database with the keys you want.

Analyze memory use

Browse keys to see their types and time-to-live (TTL), then use the Analysis tool in the left menu to generate a report. The report shows:

• Total memory used and the total number of keys.
• The largest keys, sortable by TTL, so you can see what is worth caching differently.
• The most used key types and how much memory each type takes.
• The memory split between expiring and non-expiring keys.

Use this to decide what to cache differently, or whether to raise redis_memory - see Performance tuning.

Related

• What is Redis?
• Configure Redis
• Out of memory
• Performance tuning