Page History

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# Increase memory limit to 4GB
NODE_OPTIONS=--max_old_space_size=4096

Turn on (or increase) caching of Server-Side Rendered pages

As of DSpace 7.5, we now provide basic, in-memory caching of server-side rendered (SSR) pages.  Server-side rendering is used to pre-generate full HTML pages to pass back to users (primarily anonymous users and bots).  This is necessary for Search Engine Optimization (SEO) as some web crawlers cannot use Javascript.  It also can be used to immediately show the first HTML page to users while the Javascript app loads in the user's browser.

While server-side-rendering is highly recommended on all sites, it can result in Node.js having to pre-generate many HTML pages at once when a site has a large number of simultaneous users/bots.  This may cause Node.js to spend a lot of time processing server-side-rendered content, slowing down the entire site.

Therefore, DSpace provides some basic caching of server-side rendered pages, which allows the same pre-generated HTML to be sent to many users/bots at once & decreases the frequency of server-side rendering.

These settings are documented at User Interface Configuration: Cache Settings - Server Side Rendering (SSR)

Performance Tuning the Backend (REST API)

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