Take a look at assets performance guidehttps://helpx.adobe.com/experience-manager/6-4/sites/deploying/using/assets-performance-sizing.html https://helpx.adobe.com/in/experience-manager/kb/AnalyzeMemoryProblems.html
I don't have the details of your requirement but on a high level, you will have to create an endpoint in your aem (using servlet). These endpoint will be responsible for sending response with updated content. From front-end you will be requesting these endpoint and consume the response.Some helpx ar...
Yes, you can achieve it. But in this case your this particular request has to pass from dispatcher without caching. gauravb10066713 has already mentioned few recommended approach which is used to tackle this like SDI, Ajax
You can use sling distribution for content sync across publishers.but also take a look at ASRP which does not need synchttps://helpx.adobe.com/in/experience-manager/6-3/communities/using/asrp.html
Experience fragment carries its own style (element, css, js) as they are channel agnostic and use their own structure.I am wondering, you may want to use content fragment instead.
I am trying to find more details on it but meanwhile below should clear you doubt to some extent.https://helpx.adobe.com/in/experience-manager/6-4/assets/using/medialibrary.html https://helpx.adobe.com/in/legal/product-descriptions/adobe-experience-manager-managed-services.html#WhatisAdobeExperience...