Command: system gc
Initializes a garbage collection of jobs, evaluations, allocations, and nodes. This is an asynchronous operation.
Nomad periodically garbage collects jobs, evaluations, allocations, and nodes.
The exact garbage collection logic varies by object, but in general Nomad only
permanently deletes objects once they are terminal and no longer needed for
future scheduling decisions. See
gc related server agent configuration
parameters for details on tuning periodic garbage collection.
system gc command bypasses these settings and immediately attempts to
garbage collect dead objects regardless of any "threshold" or "interval" server
settings. This is useful to quickly free memory on servers running low, but
users should prefer tuning periodic garbage collection parameters to meet their
needs instead of relying on manually running
nomad system gc [options]
If ACLs are enabled, this option requires a management token.
-address=<addr>: The address of the Nomad server. Overrides the
NOMAD_ADDRenvironment variable if set. Defaults to
-region=<region>: The region of the Nomad server to forward commands to. Overrides the
NOMAD_REGIONenvironment variable if set. Defaults to the Agent's local region.
-no-color: Disables colored command output. Alternatively,
NOMAD_CLI_NO_COLORmay be set. This option takes precedence over
-force-color: Forces colored command output. This can be used in cases where the usual terminal detection fails. Alternatively,
NOMAD_CLI_FORCE_COLORmay be set. This option has no effect if
-no-coloris also used.
-ca-cert=<path>: Path to a PEM encoded CA cert file to use to verify the Nomad server SSL certificate. Overrides the
NOMAD_CACERTenvironment variable if set.
-ca-path=<path>: Path to a directory of PEM encoded CA cert files to verify the Nomad server SSL certificate. If both
-ca-certis used. Overrides the
NOMAD_CAPATHenvironment variable if set.
-client-cert=<path>: Path to a PEM encoded client certificate for TLS authentication to the Nomad server. Must also specify
-client-key. Overrides the
NOMAD_CLIENT_CERTenvironment variable if set.
-client-key=<path>: Path to an unencrypted PEM encoded private key matching the client certificate from
-client-cert. Overrides the
NOMAD_CLIENT_KEYenvironment variable if set.
-tls-server-name=<value>: The server name to use as the SNI host when connecting via TLS. Overrides the
NOMAD_TLS_SERVER_NAMEenvironment variable if set.
-tls-skip-verify: Do not verify TLS certificate. This is highly not recommended. Verification will also be skipped if
-token: The SecretID of an ACL token to use to authenticate API requests with. Overrides the
NOMAD_TOKENenvironment variable if set.
Running the system gc command does not output unless an error occurs:
$ nomad system gc