You do not need to configure any settings to use machine learning. It is enabled by default.
Machine learning uses SSE4.2 instructions, so will only work on machines whose
CPUs support SSE4.2. If you
run Elasticsearch on older hardware you must disable machine learning (by setting
All of these settings can be added to the
elasticsearch.yml configuration file.
The dynamic settings can also be updated across a cluster with the
cluster update settings API.
Dynamic settings take precedence over settings in the
General machine learning settingsedit
true(default) to identify the node as a machine learning node.
If set to
elasticsearch.yml, the node cannot run jobs. If set to
xpack.ml.enabledis set to
node.mlsetting is ignored and the node cannot run jobs. If you want to run jobs, there must be at least one machine learning node in your cluster.
On dedicated coordinating nodes or dedicated master nodes, disable the
true(default) to enable machine learning on the node.
If set to
elasticsearch.yml, the machine learning APIs are disabled on the node. Therefore the node cannot open jobs, start datafeeds, or receive transport (internal) communication requests related to machine learning APIs. It also affects all Kibana instances that connect to this Elasticsearch instance; you do not need to disable machine learning in those
kibana.ymlfiles. For more information about disabling machine learning in specific Kibana instances, see Kibana Machine Learning Settings.
If you want to use machine learning features in your cluster, you must have
trueon all master-eligible nodes. This is the default behavior.
- The maximum percentage of the machine’s memory that machine learning may use for running
analytics processes. (These processes are separate to the Elasticsearch JVM.) Defaults to
30percent. The limit is based on the total memory of the machine, not current free memory. Jobs will not be allocated to a node if doing so would cause the estimated memory use of machine learning jobs to exceed the limit.
- The maximum
model_memory_limitproperty value that can be set for any job on this node. If you try to create a job with a
model_memory_limitproperty value that is greater than this setting value, an error occurs. Existing jobs are not affected when you update this setting. For more information about the
model_memory_limitproperty, see Analysis Limits.
- The maximum number of jobs that can run simultaneously on a node. Defaults to
20. In this context, jobs include both anomaly detector jobs and data frame analytics jobs. The maximum number of jobs is also constrained by memory usage. Thus if the estimated memory usage of the jobs would be higher than allowed, fewer jobs will run on a node. Prior to version 7.1, this setting was a per-node non-dynamic setting. It became a cluster-wide dynamic setting in version 7.1. As a result, changes to its value after node startup are used only after every node in the cluster is running version 7.1 or higher. The maximum permitted value is
- The maximum number of jobs that can concurrently be in the
openingstate on each node. Typically, jobs spend a small amount of time in this state before they move to
openstate. Jobs that must restore large models when they are opening spend more time in the
openingstate. Defaults to
Advanced machine learning settingsedit
These settings are for advanced use cases; the default values are generally sufficient:
- The maximum number of records that are output per bucket. The default value is
The number of lazily spun up Machine Learning nodes. Useful in situations where ML nodes are not desired until the first Machine Learning Job is opened. It defaults to
0and has a maximum acceptable value of
3. If the current number of ML nodes is
>=than this setting, then it is assumed that there are no more lazy nodes available as the desired number of nodes have already been provisioned. When a job is opened with this setting set at
>0and there are no nodes that can accept the job, then the job will stay in the
OPENINGstate until a new ML node is added to the cluster and the job is assigned to run on that node.
This setting assumes some external process is capable of adding ML nodes to the cluster. This setting is only useful when used in conjunction with such an external process.
- The connection timeout for machine learning processes that run separately from the Elasticsearch JVM.
10s. Some machine learning processing is done by processes that run separately to the Elasticsearch JVM. When such processes are started they must connect to the Elasticsearch JVM. If such a process does not connect within the time period specified by this setting then the process is assumed to have failed. Defaults to
10s. The minimum value for this setting is