Quick answer
Learn why Redis availability matters, how TCP port 6379 monitoring works, and where a cache availability check fits in a production monitoring strategy.
Why Redis deserves monitoring
A Redis outage can turn a small cache failure into a wider application slowdown when traffic falls back to a primary database. Monitoring the cache layer can give the team an earlier signal.
What port 6379 tells you
Redis commonly listens on TCP port 6379. A successful TCP connection indicates that the network path and the listening socket are available. It does not validate every Redis command or application-level permission.
Pair cache monitoring with application monitoring
Use a Redis port check alongside a public API or website check. If Redis is down but the website is still up, you have an early infrastructure warning. If both fail, you have stronger evidence of a broader incident.
Keep credentials out of monitoring examples
TCP checks are useful precisely because they do not require putting database passwords into a monitoring configuration. For deeper application checks, treat credentials as secrets and use dedicated low-privilege accounts.
Sources and references
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