nodetool proxyhistograms

Provides a histogram of network statistics at the time of the command.

Synopsis

nodetool <options> proxyhistograms

Cassandra tarball installations:

installation_location/cassandra/bin

Table 1. Options
Short	Long	Description
`-h`	`--host`	Hostname or IP address.
`-p`	`--port`	Port number.
`-pwf`	`--password-file`	Password file path.
`-pw`	`--password`	Password.
`-u`	`--username`	Remote JMX agent username.
`--`	Separates an option from an argument that could be mistaken for a option.

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