nodetool netstats

Provides network information about the host.

Provides network information about the host.

Synopsis

nodetool <options> netstats -H
Tarball and Installer No-Services path:
installation_location/resources/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.
-H --human-readable Display bytes in human readable form: KiB (kibibyte), MiB (mebibyte), GiB (gibibyte), TiB (tebibyte).
-- Separates an option from an argument that could be mistaken for a option.

Description

The default host is the connected host if the user does not include a host name or IP address in the command. The output includes the following information:
  • JVM settings
  • Mode

    The operational mode of the node: JOINING, LEAVING, NORMAL, DECOMMISSIONED, CLIENT

  • Read repair statistics
  • Attempted

    The number of successfully completed read repair operations.

  • Mismatch (blocking)

    The number of read repair operations since server restart that blocked a query.

  • Mismatch (background)

    The number of read repair operations since server restart performed in the background.

  • Pool name

    Information about client read and write requests by thread pool size.

  • Active, pending, and completed number of commands and responses

Example

Get the network information of the local node:

nodetool netstats

The output is:

Mode: NORMAL
Not sending any streams.
Read Repair Statistics:
Attempted: 0
Mismatch (Blocking): 1
Mismatch (Background): 1
Pool Name                    Active   Pending      Completed   Dropped
Large messages                  n/a         0              0         0
Small messages                  n/a         0          23295         0
Gossip messages                 n/a         0        1853117         0