Is it advisable to delete the plugin cache folders prior to doing a backup for an upgrade?

[Ngoc_Bui]

I was thinking of delete the plugin cache folders in the home directory prior to making a backup for a version upgrade to save time and disk space when doing a backup.  However it was mentioned in the article below that some 3rd party may store metadata in these directories.  Is there are way to regenerate the 3rd party metadata if the content are missing from the cache?  My guess is this can be achieved by uninstalling and reinstalling the plugins?

https://confluence.atlassian.com/confkb/how-to-clear-confluence-plugins-cache-297664846.html

[edwin vasquez]

Never actually done that, but I’d recommend testing it out in a staging environment prior to doing it in production. 🙂

[DPK J]

@Ngoc_Bui  First of all welcome to the community, hopefully you will enjoy it.

Now coming to your question, I give you an insight what I do,

• I don't keep 'plugin-cache' in my backup
• 'plugin-cache' will automatically regenerate when you start you confluence, or install plugins, so you don't need to worry about this.

So, overall, you don't need to care much about this, if you want to take a backup simply backup your home (not including cache) and DB, and if you want to upgrade simply upgrade.

If you need more insights, please bounce back.

[Peter-I]

@DPK J , when you say "... or install plugins", do you mean that installing/updating a plugin will regenerate the cache for that specific plugin? 

What if you have a plugin which you uninstall and then re-install - will that trigger plugin-cache regeneration, without going through Confluence service restart?

I'm looking for additional information on the cache clearing, if available 

[DPK J]

@Peter-I  Plugins don't have control over cache, it is controlled by Confluence Server.

So, re-installing them will create cache again.

Here is more subtle information about it - https://confluence.atlassian.com/confkb/how-to-clear-confluence-plugins-cache-297664846.html