No, Apache Solr is not resource intensive. And in most cases, you do not need to invest in newer server.
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How far along are you on the journey to provide e-commerce options to your customers?
June 14, 2019
Reasons to Choose nopCommerce as an eCommerce Development Solution
February 20, 2019
Have a look at nopAccelerate Demo Store with 80,000+ products with nopAccelerate Solr and CDN Plugin.