Details
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Improvement
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Resolution: Won't Fix
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Minor
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None
Description
The sizing[1] and RAM quota[2] documentation should be more clear about the specific best practices around general server RAM quota of no greater than 80% physical RAM per node on nodes with 16GB or more, or no greater than 60% on nodes with less than 16GB.
Emphasizing that the 20% or 40% remainder of RAM is required for the operating system, file system caches, and so on would be helpful as well.
Additionally, the RAM quota sub-section of the Memory quota section[3] reads as if it is abruptly cut off or otherwise incomplete:
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RAM quota
You will not be able to allocate all your machine RAM to the per_node_ram_quota as there may be other programs running on your machine.
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1. http://docs.couchbase.com/couchbase-manual-2.5/cb-admin/#couchbase-bestpractice-sizing
2. http://docs.couchbase.com/couchbase-manual-2.5/cb-admin/#ram-quotas
3. http://docs.couchbase.com/couchbase-manual-2.5/cb-admin/#memory-quota