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.


nodetool [<connection_options>] proxyhistograms
Syntax conventions Description


Literal keyword.


Not literal.


Variable value. Replace with a valid option or user-defined value.

[ ]

Optional. Square brackets ( [ ] ) surround optional command arguments. Do not type the square brackets.

( )

Group. Parentheses ( ( ) ) identify a group to choose from. Do not type the parentheses.


Or. A vertical bar ( | ) separates alternative elements. Type any one of the elements. Do not type the vertical bar.


Repeatable. An ellipsis ( ... ) indicates that you can repeat the syntax element as often as required.

'<Literal string>'

Single quotation ( ' ) marks must surround literal strings in CQL statements. Use single quotation marks to preserve upper case.

{ <key>:<value> }

Map collection. Braces ( { } ) enclose map collections or key value pairs. A colon separates the key and the value.


Set, list, map, or tuple. Angle brackets ( < > ) enclose data types in a set, list, map, or tuple. Separate the data types with a comma.


End CQL statement. A semicolon ( ; ) terminates all CQL statements.

[ -- ]

Separate the command line options from the command arguments with two hyphens ( -- ). This syntax is useful when arguments might be mistaken for command line options.

' <<schema> ... </schema> >'

Search CQL only: Single quotation marks ( ' ) surround an entire XML schema declaration.


Search CQL only: Identify the entity and literal value to overwrite the XML element in the schema and solrconfig files.


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.


Get network statistics histogram

nodetool proxyhistograms
proxy 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

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