If your Solr system has low performance, out-of-memory errors, or frequent issues with replicas falling into recovery mode, then be sure to read the following helpful publications:
- Solr Out of Memory (OOM): Causes and Solutions: A SearchStax blog on Solr configuration settings that over-allocate memory, which slows down performance and risks crashing Solr.
- 5 Ways to Optimize Solr Search Performance for Sitecore: Several settings in solrconfig.xml profoundly impact Solr reliability and performance. Unfortunately, the default values are sometimes very poor ones.
- Performance optimization for the xConnect Search Service when using Solr: A Sitecore knowledge-base article on how to configure xConnect when indexing the Sitecore xDB collection in Solr.
Do not hesitate to contact the SearchStax Support Desk.