Monitoring MongoDB performance metrics (MMAP)

This article discusses the monitoring of MongoDB performance metrics using the MMAPv1 storage engine. It provides an overview of NoSQL databases and explains how MongoDB works as a document-oriented database. The key areas to track and analyze metrics are outlined, including throughput metrics, database performance, resource utilization, and concurrent operations management. Metrics related to replication and oplog, journaling, background flush, cursors, storage size, memory usage, and host-level metrics are also discussed. The article concludes by emphasizing the importance of monitoring these metrics for maintaining good MongoDB performance and identifying areas where tuning could provide significant benefits.