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Percona Software for MongoDB Documentation

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System requirements

  • At least 1GB RAM is required to operate successfully.
  • At least 2 logical CPU cores are recommended to reduce the 100% CPU saturation risk during the synchronization period

  • PLM process must be able to connect to all replica set nodes that could become a new primary. In non-sharded replica set deployments, this means connecting to all the nodes that could become a new primary node. To become a primary, a node must meet the following criteria:

    • have priority greater than 0 and must be able to vote (votes: 1)
    • is not an arbiter (arbiterOnly: false)
    • is not hidden (hidden: false)
    • is not delayed

Note that networking issues like connection to the remote backup storage can also affect PLM performance.

Last update: November 24, 2025
Created: November 24, 2025