swap off on cassandra/zookeeper servers?

Not applicable

Should we be running cass/zk servers w/ swap on or off in private cloud?

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Swap should be disabled in Cassandra. For Cassandra, it's better for the node to be dead because of less memory than try to operate with such high latency introduced by swapping.

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Swap should be disabled in Cassandra. For Cassandra, it's better for the node to be dead because of less memory than try to operate with such high latency introduced by swapping.