Keep sockets around in a pool to be used by other requests in the future. Default = false

When using HTTP KeepAlive, how often to send TCP KeepAlive packets over sockets being kept alive. Default = 1000. Only relevant if keepAlive is set to true.

Maximum number of sockets to allow per host. Default for Node 0.10 is 5, default for Node 0.12 is Infinity

Maximum number of sockets allowed for all hosts in total. Each request will use a new socket until the maximum is reached. Default: Infinity.

Maximum number of sockets to leave open in a free state. Only relevant if keepAlive is set to true. Default = 256.

Socket timeout in milliseconds. This will set the timeout after the socket is connected.

Scheduling strategy to apply when picking the next free socket to use.