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Extsort-doc-group.xxxx growing rapidly and mongo server get hangs

Susampath_Madarasinghe (Susampath Madarasinghe) September 10, 2021, 12:40pm 1

We have a MongoDB 3.6 server with 5 replicas. Some times extsort-doc-group.xxx file grows rapidly and hangs the server. Does anyone know the root cause for this and the solutions?