Mongod process with wiredTiger engine consumes up to half of RAM in Satellite6

Solution Verified - Updated -

Issue

  • mongo updated to use wiredTiger storage engine
  • sometimes, mongod consumes randomly high memory (up to 1/2 of all RAM)
  • this aggressive memory usage limits other processes or can cause OOM killer to kill mongod

Is that high memory usage expected? Is there a way to limit memory footprint of mongod?

Environment

  • Red Hat Satellite 6
    • mongo configured with wiredTiger mongo engine

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