nodetool gcstats
Print garbage collection (GC) statistics.
Synopsis
Print garbage collection (GC) statistics.
C:\> %CASSANDRA_HOME%\nodetool [options] gcstats
Short | Long | Description |
---|---|---|
-h |
--host |
Hostname or IP address |
-p |
--port |
Port number |
-pwf |
--password-file |
Password file path |
-pw |
--password |
Password |
-u |
--username |
User name |
Note:
- If a username and password for RMI authentication are set explicitly in the cassandra-env.ps1 file for the host, then you must specify credentials.
nodetool gcstats
operates on a single node in the cluster if -h is not used to identify one or more other nodes. If the node from which you issue the command is the intended target, you do not need the -h option to identify the target; otherwise, for remote invocation, identify the target node, or nodes, using -h.
Description
The nodetool gcstats
command will print garbage collection statistics that
returns values based on all the garbage collection that has run since the last time
nodetool gcstats
was run. Statistics identify the interval time, some GC
elapsed time measures, the disk space reclaimed (in MB), number of garbage collections that
took place, and direct memory bytes.
Examples
C:\> %CASSANDRA_HOME%\nodetool -u cassandra -pw cassandra gcstats
The location of the
cassandra-env.sh file depends on the type of installation:
Package installations | /etc/cassandra/cassandra-env.sh |
Tarball installations | install_location/conf/cassandra-env.sh |