Apache Solr is an open-source search platform that is used to build search applications. It is built on top of the Apache Lucene search library, which is a high-performance, full-featured text search engine written in Java. Solr provides additional features and functionalities that make it easier to set up and manage search applications.

SearchStax offers two solutions around Solr.

• SearchStax Cloud is a fully-managed SaaS solution that automates, manages, maintains and scales Solr search infrastructure in public or private clouds.
• SearchStax Studio delivers advanced, modern and personalized search for your website or custom application. Studio adds out-of-the-box search analytics and provides easy-to-use tools for marketers to control the key features of Solr including ranking, facets, spellcheck, synonyms, stopwords, rules, filters and promotions.

SearchStax Cloud is a fully-managed SaaS solution that automates, manages, maintains and scales Solr search infrastructure in public or private clouds.

If your Solr system has low performance, out-of-memory errors, or frequent issues with replicas falling into recovery mode, then be sure to check out these useful blog posts from SearchStax:

• 5 Ways to Optimize Solr Search Performance
• Sitecore Best Practices for Solr Indexing
• Top 10 Best Practices for Taking Solr to Production
• Solr Out-of-Memory (OOM) Causes and Solutions