nodetool gcstats

Returns garbage collection statistics about all the garbage collection that has run since the last time nodetool gcstats was run.

Statistics include the following information:

interval
GC elapsed time (total and standard deviation)
disk space reclaimed in megabytes (MB)
number of garbage collections
direct memory bytes

Synopsis

nodetool [<connection_options>] gcstats

Definition

If a parameter has multiple forms, the following reference provides both the short form and long form, separated by a comma.

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:

To print garbage collection statistics

nodetool gcstats

Result

Interval (ms) Max GC Elapsed (ms)Total GC Elapsed (ms)Stdev GC Elapsed (ms)   GC Reclaimed (MB)         Collections      Direct Memory Bytes
    520255260                 350               43299                  24             1231539                1108                220182597</codeblock></section>