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Question-53: Which of the following is a recommended value for vm.swappiness for Cloudera CDP Private Cloud Base host?
- 10
- 60
- 99
- 0
Answer: 1
Exp: The kernel parameter that determines the tendency of the kernel to swap pages in and out of the main memory is vm.swappiness. By default, on RHEL 7 and variants, the value is set to 60 (range 0-99). This is not appropriate for hadoop clusters. This needs to be tuned down to 1 to avoid unnecessary page outs and long garbage collection pauses.
- Get All Questions & Answer for CDP Generalist Exam (CDP-0011) and trainings.
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This Question is from QuickTechie Cloudera CDP Certification Preparation Kit.
To make this parameter persist across reboots, an entry needs to be made in /etc/sysctl.conf file as follows --
vm.swappiness=1
- Get All Questions & Answer for CDP Generalist Exam (CDP-0011) and trainings.
- Get All Questions & Answer for CDP Administrator - Private Cloud Base Exam CDP-2001 and trainings.
- Get All Questions & Answer for CDP Data Developer Exam CDP-3001 and trainings.
This Question is from QuickTechie Cloudera CDP Certification Preparation Kit.
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