Integrating Support for Non-Volatile Memory Into WiredTiger

Integrating Support for Non-Volatile Memory Into WiredTiger, a component of the MongoDB storage engine, aims to utilize Intel Optane DC Persistent Memory as a volatile extension of DRAM. This approach can provide better performance than using more DRAM alone, especially for large workloads with read-dominant characteristics, while offering cost-effectiveness by reducing memory costs. However, the presence of writes can negatively impact performance and make NVRAM unprofitable relative to DRAM. The solution introduces an Overhead Bypass (OBP) metric to limit write overhead and ensure optimal cache utilization, resulting in improved performance for workloads with large datasets that benefit from extra caching.

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