Redis TTL

Redis TTL Command

Redis TTL command is used to get the remaining time of key expiry in seconds.

Returns the remaining time to live of a key that has a timeout. This introspection capability allows a Redis client to check how many seconds a given key will continue to be part of the dataset.

Here are some common uses and scenarios for the "TTL" command:

• Cache Management: Check the expiration status of cached data.
• Session Handling: Determine the remaining session timeout.
• Dynamic TTL Adjustment: Adjust TTL based on business logic or user interactions.
• Rate Limiting: Query TTL for rate limiting and access control.

Syntax:

TTL KEY_NAME

Available since

1.0.0.

Return Value

Integer value TTL in milliseconds, or a negative value

• TTL in milliseconds..
• -1, if the key does not have expiry timeout.
• -2, if the key does not exist.

Return Value Type

Integer

Example: Redis TTL

First, create a key in redis and set some value in it.

Now set the expiry of the key and after that just check the remaining expiry time.

127.0.0.1:6379[1]> SET key "Apple"
OK
127.0.0.1:6379[1]> EXPIRE key 20
(integer) 1
127.0.0.1:6379[1]> TTL key
(integer) 16

Example: Redis TTL another example

First, create a key in redis and set some value in it.

Now set the expiry of the key, and after that just check the remaining expiry time.

127.0.0.1:6379[1]> SET key "PHP"
OK
127.0.0.1:6379[1]> EXPIRE key 10
(integer) 1
127.0.0.1:6379[1]> TTL key
(integer) 6
127.0.0.1:6379[1]> TTL key
(integer) -2
127.0.0.1:6379[1]> GET key
(nil)

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