SQLITE ON RAILS: THE HOW AND WHY OF OPTIMAL PERFORMANCE

Summary from the TLDR Web Dev newsletter

SQLite out-of-the-box on Rails isn't production ready. It needs some performance improvements with the help of some Ruby gems (packages) that enable immediate transactions, manage write query queues, and release the Global VM lock while queries wait for database responses. SQLite should be used in the write-ahead-log (WAL) mode and should have separate connection pools for reading and writing operations.