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I have a MongoDB cluster. The cluster is currently writing (mostly inserts) 4k/sec. When I increase the number of inserts from 4k to 5k, I can see oplog window slowly reducing, possibly to 0 if I do not intervene. What are ways I can increase the number of inserts while maintaining oplog window? The cluster is on AWS m5.2xlarge, CPU is running fine (under 20%). Would a more performant instance help in this regard?

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  • Do you mean a "sharded cluster"? Do you have more than one mongos? May 18 at 14:28
  • It is a single replica set.
    – Howard Lee
    May 18 at 17:27
  • Then you may consider a shared cluster in order to distribute the load May 18 at 21:37
  • @WernfriedDomscheit that is true. ty.
    – Howard Lee
    May 19 at 16:08

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