Dnn.platform: When using the Cacheable attribute on models in custom modules, how long are items cached for?

Created on 1 Apr 2019 · 4Comments · Source: dnnsoftware/Dnn.Platform

Summary

The Cacheable attribute that may be applied to models in custom module developments contains a parameter for CacheTimeOut. How is this parameter used to calculate cache expiration time?

Extended description

https://github.com/dnnsoftware/Dnn.Platform/blob/584b0f54bd6b6d237594dd9f96053f14db0b1a53/DNN%20Platform/Library/ComponentModel/DataAnnotations/CacheableAttribute.cs#L81 states that the CacheTimeOut parameter is multiplied by the "Host Performance Setting to determine the actual timeout value" - Where is the "Host Performance Setting" that this is referencing? What are the corresponding times used to calculate Sliding expiration in seconds, milliseconds or other time-based values?

Affected version

[x] 9.3.0
[x] 9.2.2
[x] 9.2.1
[x] 9.2
[x] 9.1.1
[ ] 9.1
[ ] 9.0

Source

shanewalker1595

Most helpful comment

The CacheTimeOut parameter is multiplied by the PerformanceSetting

https://github.com/dnnsoftware/Dnn.Platform/blob/435adfc24e7e5c4fa8733a6b1c70dc4effbfecfd/DNN%20Platform/Library/Common/Globals.cs#L119-L137

The default value for CacheTimeOut is 20. Lets say you have HeavyCaching enabled. This would cache _most_ objects for 2hrs (120minutes). However, some core objects use non-default CacheTimeOut values.

For example, portal aliases are have an initial value of 200 (so 20hrs cached in HeavyCaching). On the shorter side of things, Captcha tokens have a CacheTimeOut value of 2 (6mins in HeavyCaching). You should be able to sit on a page for 5 minutes in that configuration and the Captcha token would still be valid, however if you waited 7 minutes it should fail.

ohine on 8 Apr 2019

👍2

All 4 comments

I am following this because I also have the same question, would be nice to add the details of how this works in the new Dnn Docs when we know the details.