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Oracle® ZFS Storage Appliance Analytics Guide, Release OS8.7.0

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Updated: March 2017

Network: TCP Retransmissions

This statistic shows TCP retransmissions.

When to Check TCP Retransmissions

Rarely. Since packets usually map to protocol operations, it is often more useful to examine these using the Protocol statistics. However, certain network types, as well as client receive buffers sizes, are more prone to TCP retransmissions, which can manifest as high latency.

TCP Retransmissions Breakdowns

Table 80  Breakdowns of TCP Retransmissions
Remote client, either as a hostname or IP address
local service
TCP port: http/ssh/215(administration)/...
local IP address
The appliance IP address that packets are sent from or received on
packet size
Size of the transmitted packet