nodetool proxyhistograms
Returns a histogram of network operation statistics at the time of the command.
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 internode communication. Typically, you use the command to see if requests encounter a slow node.
CAS Read Latency and CAS Write Latency provides data for compare-and-set operations.
View Write Latency provides data for materialized view write operations.
Synopsis
nodetool [<connection_options>] proxyhistogramsDefinition
The short- and long-form options are comma-separated.
Connection options
- -h, --host hostname
-
The hostname or IP address of a remote node or nodes. When omitted, the default is the local machine.
- -p, --port jmx_port
-
The JMX port number.
- -pw, --password jmxpassword
-
The JMX password for authenticating with secure JMX. If a password is not provided, you are prompted to enter one.
- -pwf, --password-file jmx_password_filepath
-
The filepath to the file that stores JMX authentication credentials.
- -u, --username jmx_username
-
The username for authenticating with secure JMX.
Command arguments
This command takes no arguments.
Examples
Get network statistics histogram
nodetool proxyhistogramsproxy histograms
Percentile Read Latency Write Latency Range Latency CAS Read Latency CAS Write Latency View Write Latency
(micros) (micros) (micros) (micros) (micros) (micros)
50% 1310.72 327.68 2097.15 0.00 0.00 229.38
75% 1310.72 524.29 4194.30 0.00 0.00 327.68
95% 1310.72 1048.58 4194.30 0.00 0.00 786.43
98% 1310.72 1048.58 4194.30 0.00 0.00 1310.72
99% 1310.72 1048.58 4194.30 0.00 0.00 2097.15
Min 1310.72 196.61 1048.58 0.00 0.00 0.00
Max 1572.86 1310.72 5242.88 0.00 0.00 268435.46