CODEWITHSUNDEEP
redis
JeffGallant
JeffGallant

Reputation: 449

What might delete keys from Redis?

We have 3 apps on our server. They talk to each other via Redis. Redis is the bus for all communication.

Something on our server is incorrectly deleting keys from Redis. I am trying to track down the problem. For each app, I downloaded the code to my machine, and then tried: 

grep -iR "flush" *
grep -iR "del" *

Two of the apps are free of "flush" and "del". Only one app has "del". So I found its PID and: 

kill -9 2312

I also did "ps aux" to make sure that app was off.

The other 2 apps only have:

hset
hget
hmgetall

The disappearance of the keys in Redis is erratic. Some keys last several minutes, or even hours. Others disappear quickly.

As near as I can see, none of the developers have set timeouts on the keys in Redis. But maybe something sets a default timeout?

How do I debug this? Where do I look?

Upvotes: 1

Views: 1803

Answers (1)

FGRibreau
FGRibreau

Reputation: 7229

Do take a look at Redis configuration:

config get maxmemory*

Be sure that maxmemory is large enough for your dataset otherwise keys will be automatically dropped with the specified maxmemory-policy.

Upvotes: 2

Related Questions