nodetool proxyhistograms

Provides a histogram of network statistics.

Synopsis

nodetool <options> proxyhistograms

Options are:

( -h | --host ) <host name> | <ip address>
( -p | --port ) <port number>
( -pw | --password ) <password >
( -u | --username ) <user name>
( -pwf <passwordFilePath | --password-file <passwordFilePath> )

Description

The output of this command shows the full request latency recorded by the coordinator. The output includes the percentile rank of read and write latency values for inter-node communication. Typically, you use the command to see if requests encounter a slow node.

Examples

This example shows the output from nodetool proxyhistograms after running 4,500 insert statements and 45,000 select statements on a three ccm node-cluster on a local computer.

nodetool proxyhistograms

proxy histograms
Percentile      Read Latency     Write Latency     Range Latency
                    (micros)          (micros)          (micros)
50%                  1502.50            375.00            446.00
75%                  1714.75            420.00            498.00
95%                 31210.25            507.00            800.20
98%                 36365.00            577.36            948.40
99%                 36365.00            740.60           1024.39
Min                   616.00            230.00            311.00
Max                 36365.00          55726.00          59247.00