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Hi developer.doanhngo@gmail.com,
Please note that the SERVER project is for reporting bugs or feature suggestions for the MongoDB server; documentation feedback should be reported in the DOCS project.
I've already followed up on your mongodb-user post regarding this same topic, but for reference for others finding this issue, the response was:
The recommended ulimit settings and information in the Production Notes provide general guidance but do not necessarily suit all deployments. If your deployment has special requirements (such as a large number of collections & indexes), you need to adjust limits so they are appropriate for your use case.
The ulimit reference in the MongoDB manual includes more information on how file descriptors are used as well as possible consequences of setting limits too low. Limits are intended to put a reasonable upper bound on resource consumption. If your limits are set too high it is possible that your workload may exceed available resource capacity, which will result in stalls or other performance issues.
Regards,
Stennie
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