[DOC] Add documentation on caching for the Snapshot’s RepositoryData

[inpink]

What do you want to do?

• Request a change to existing documentation
• Add new documentation
• Report a technical problem with the documentation
• Other

Tell us about your request. Provide a summary of the request.
The Snapshot feature improves performance by caching RepositoryData.
I’d like to add documentation on caching to this page.
Currently, up to 500KB of RepositoryData can be cached, with an option to disable caching entirely.
I also submitted a PR to the OpenSearch Project to enable users to set the maximum cache size according to their needs, and I would like to include this update in the documentation as well.

Version: List the OpenSearch version to which this issue applies, e.g. 2.14, 2.12--2.14, or all.
2.19

What other resources are available? Provide links to related issues, POCs, steps for testing, etc.
opensearch-project/OpenSearch#16489

[Naarcha-AWS]

Hi @inpink! Do you have a link to the development PR you submitted?

[inpink]

Hello, @Naarcha-AWS!
The PR I submitted is #16489, and the related issue is #16298. (I’ve also included links to these in the body of the post.)

I am discussing this topic in the two links above. Once the PR is merged, I’ll submit a PR to the documentation as well. Thank you for assigning me the issue! 😄🎉 Have a nice day!

[dbwiddis]

This will actually be no earlier than 2.19.

[inpink]

This will actually be no earlier than 2.19.

Ah, got it! I’ve updated the content to version 2.19 as requested. Thank you for pointing that out, @dbwiddis.

@Naarcha-AWS, would you mind adjusting the label? Much appreciated!