Lightsail: file changes are slow be reflected

Question

Hi, if I deploy new changes to the instance (eg via Git) or I make direct changes to files on the instance, it can take up to 30-60 seconds before the changes are actually reflected.

Steps to reproduce:
1. Login to your instance
2. Make a change to a file (eg add a new line of text)
3. Visit that page in your browser - you'll see that the new line of text doesn't show up until 30-60 seconds of repeatedly refreshing

Why is this and how to avoid it?
Thanks

Answer

Hello.

Is caching enabled on your web server?  
With Apache, if you use something like "mod_cache.so", it will be cached.  
https://httpd.apache.org/docs/2.4/en/mod/mod_cache.html

Also, if you are using php, please check the settings in "php.ini".  
If the setting value of "opcache.revalidate_freq" in "php.ini" is a large number, it will take time to update.  
https://www.php.net/manual/en/opcache.configuration.php

Lightsail: file changes are slow be reflected

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