redis - max value for session timeout

[krishna prasad]

Hi All,

I am using Brocaar LoRa server for one of my requirement.

Broccar is using below redis command  to set the session timeout.

https://redis.io/commands/pexpire

What will be the maximum value which can be provided to this command?

Thanks and Regards,

Krishna

[Itamar Haber]

Hello Krishna,

The maximum value that you can set with PEXPIRE is 9223372036854775807 milliseconds (or, in humane terms, the maximal value of a signed long long).

Cheers,

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Itamar Haber Technicalist Evangenly Phone: +972.54.567.9692

[hva...@gmail.com]

Hi Itamar,

Discussions on this list in the past have suggested that the precision limits for integer scores described in https://redis.io/commands/zadd are applicable to all integer values in Redis.  I.e., +/- 2^^53, or +/- 9007199254740992.  Is this the case?

On Thursday, June 7, 2018 at 1:57:19 AM UTC-7, Itamar Haber wrote:

Hello Krishna,

The maximum value that you can set with PEXPIRE is 9223372036854775807 milliseconds (or, in humane terms, the maximal value of a signed long long).

Cheers,

On Thu, Jun 7, 2018 at 4:15 AM, krishna prasad <krish...@gmail.com> wrote:

Hi All,

I am using Brocaar LoRa server for one of my requirement.

Broccar is using below redis command  to set the session timeout.

https://redis.io/commands/pexpire

What will be the maximum value which can be provided to this command?

Thanks and Regards,

Krishna

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[Itamar Haber]

I'm not certain that this is the case, and both src and the cli seem to support this:

127.0.0.1:6379> pexpire a 9223372036854775807

(integer) 1

127.0.0.1:6379> pexpire a 9223372036854775808

(error) ERR value is not an integer or out of range

The 53-bit integer precision, afaik, applies only to the scores of elements in a sorted set as these are stored as doubles (IEEE 754 floating points).

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[hva...@gmail.com]

Thanks.  Searching the archived threads, I see I misunderstood those previous discussions.  The IEEE 754 precision limit is only for scores in sorted sets, not other integer values.