Why is it recommended to have swappiness to zero?

Couchbase Server
1

Hi, I wanted to know why it is recommended to have swappinees to zero for all data and index nodes in couchbase?

2

To avoid swapping active node memory. By avoiding swapping active node memory performance should be more consistent. The node processes are typically long-lived (and are large memory consumers) so become likely candidates for swapping if enabled.

A description of swappiness, e.g. SwapFaq - Community Help Wiki should help make the recommendation obvious.

HTH.

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