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<div><h1 class="title"><a id="id-1"></a>General configuration options</h1><a class="edit_me" rel="nofollow" title="Edit this page on GitHub" href="https://github.com/elastic/apm-server/edit/7.11/docs/configuration-process.asciidoc">edit</a></div>
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<div class="position-relative"><h2 class="title"><a id="configuration-process"></a>General configuration options</h2><a class="edit_me" rel="nofollow" title="Edit this page on GitHub" href="https://github.com/elastic/apm-server/edit/7.11/docs/configuration-process.asciidoc">edit</a></div>
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<p>Example config file:</p>
<div class="pre_wrapper lang-yaml">
<div class="console_code_copy" title="Copy to clipboard"></div>
<pre class="programlisting prettyprint lang-yaml">apm-server:
  host: "localhost:8200"
  rum:
    enabled: true

output:
  elasticsearch:
    hosts: ElasticsearchAddress:9200

queue.mem.events: 4096

max_procs: 4</pre>
</div>
<div class="note admon">
<div class="icon"></div>
<div class="admon_content">
<p>If you are using an X-Pack secured version of Elastic Stack,
you need to specify credentials in the config file before you run the commands that set up and start APM Server.
For example:</p>
</div>
</div>
<div class="pre_wrapper lang-yaml">
<div class="console_code_copy" title="Copy to clipboard"></div>
<pre class="programlisting prettyprint lang-yaml">output.elasticsearch:
  hosts: ["ElasticsearchAddress:9200"]
  username: "elastic"
  password: "elastic"</pre>
</div>
<div class="position-relative"><h3><a id="configuration-apm-server"></a>Configuration options: <code class="literal">apm-server.*</code></h3><a class="edit_me" rel="nofollow" title="Edit this page on GitHub" href="https://github.com/elastic/apm-server/edit/7.11/docs/configuration-process.asciidoc">edit</a></div>
<div class="position-relative"><h4><a id="host"></a><code class="literal">host</code></h4><a class="edit_me" rel="nofollow" title="Edit this page on GitHub" href="https://github.com/elastic/apm-server/edit/7.11/docs/configuration-process.asciidoc">edit</a></div>
<p>Defines the host and port the server is listening on.
Use "unix:/path/to.sock" to listen on a unix domain socket.
Defaults to <em>localhost:8200</em>.</p>
<div class="position-relative"><h4><a id="max_header_size"></a><code class="literal">max_header_size</code></h4><a class="edit_me" rel="nofollow" title="Edit this page on GitHub" href="https://github.com/elastic/apm-server/edit/7.11/docs/configuration-process.asciidoc">edit</a></div>
<p>Maximum permitted size of a request&#8217;s header accepted by the server to be processed (in Bytes).
Defaults to 1048576 Bytes (1 MB).</p>
<div class="position-relative"><h4><a id="idle_timeout"></a><code class="literal">idle_timeout</code></h4><a class="edit_me" rel="nofollow" title="Edit this page on GitHub" href="https://github.com/elastic/apm-server/edit/7.11/docs/configuration-process.asciidoc">edit</a></div>
<p>Maximum amount of time to wait for the next incoming request before underlying connection is closed.
Defaults to 45 seconds.</p>
<div class="position-relative"><h4><a id="read_timeout"></a><code class="literal">read_timeout</code></h4><a class="edit_me" rel="nofollow" title="Edit this page on GitHub" href="https://github.com/elastic/apm-server/edit/7.11/docs/configuration-process.asciidoc">edit</a></div>
<p>Maximum permitted duration for reading an entire request.
Defaults to 30 seconds.</p>
<div class="position-relative"><h4><a id="write_timeout"></a><code class="literal">write_timeout</code></h4><a class="edit_me" rel="nofollow" title="Edit this page on GitHub" href="https://github.com/elastic/apm-server/edit/7.11/docs/configuration-process.asciidoc">edit</a></div>
<p>Maximum permitted duration for writing a response.
Defaults to 30 seconds.</p>
<div class="position-relative"><h4><a id="shutdown_timeout"></a><code class="literal">shutdown_timeout</code></h4><a class="edit_me" rel="nofollow" title="Edit this page on GitHub" href="https://github.com/elastic/apm-server/edit/7.11/docs/configuration-process.asciidoc">edit</a></div>
<p>Maximum duration in seconds before releasing resources when shutting down the server.
Defaults to 5 seconds.</p>
<div class="position-relative"><h4><a id="max_event_size"></a><code class="literal">max_event_size</code></h4><a class="edit_me" rel="nofollow" title="Edit this page on GitHub" href="https://github.com/elastic/apm-server/edit/7.11/docs/configuration-process.asciidoc">edit</a></div>
<p>Maximum permitted size of an event accepted by the server to be processed (in Bytes).
Defaults to 307200 Bytes.</p>
<div class="position-relative"><h3><a id="configuration-other"></a>Configuration options: general</h3><a class="edit_me" rel="nofollow" title="Edit this page on GitHub" href="https://github.com/elastic/apm-server/edit/7.11/docs/configuration-process.asciidoc">edit</a></div>
<div class="position-relative"><h4><a id="max_connections"></a><code class="literal">max_connections</code></h4><a class="edit_me" rel="nofollow" title="Edit this page on GitHub" href="https://github.com/elastic/apm-server/edit/7.11/docs/configuration-process.asciidoc">edit</a></div>
<p>Maximum number of TCP connections to accept simultaneously.
Default value is 0, which means <em>unlimited</em>.</p>
<div class="position-relative"><h4><a id="config-secret-token"></a><code class="literal">secret_token</code></h4><a class="edit_me" rel="nofollow" title="Edit this page on GitHub" href="https://github.com/elastic/apm-server/edit/7.11/docs/configuration-process.asciidoc">edit</a></div>
<p>Authorization token for sending data to the APM server.
If a token is set, the agents must send it in the following format:
Authorization: Bearer &lt;secret-token&gt;.
The token is not used for RUM endpoints. By default, no authorization token is set.</p>
<p>It is recommended to use an authorization token in combination with SSL enabled.
Read more about <a class="xref" href="securing-apm-server.html" title="Secure APM Server">Securing APM Server</a> and the <a class="xref" href="secret-token.html" title="Secret token">secret token</a>.</p>
<div class="position-relative"><h4><a id="capture_personal_data"></a><code class="literal">capture_personal_data</code></h4><a class="edit_me" rel="nofollow" title="Edit this page on GitHub" href="https://github.com/elastic/apm-server/edit/7.11/docs/configuration-process.asciidoc">edit</a></div>
<p>If true,
APM Server captures the IP of the instrumented service and its User Agent if any.
Enabled by default.</p>
<div class="position-relative"><h4><a id="expvar.enabled"></a><code class="literal">expvar.enabled</code></h4><a class="edit_me" rel="nofollow" title="Edit this page on GitHub" href="https://github.com/elastic/apm-server/edit/7.11/docs/configuration-process.asciidoc">edit</a></div>
<p>When set to true APM Server exposes <a href="https://golang.org/pkg/expvar/" class="ulink" target="_top">golang expvar</a>.
Disabled by default.</p>
<div class="position-relative"><h4><a id="expvar.url"></a><code class="literal">expvar.url</code></h4><a class="edit_me" rel="nofollow" title="Edit this page on GitHub" href="https://github.com/elastic/apm-server/edit/7.11/docs/configuration-process.asciidoc">edit</a></div>
<p>Configure the url to expose expvar.
Defaults to <code class="literal">debug/vars</code>.</p>
<div class="position-relative"><h4><a id="instrumentation.enabled"></a><code class="literal">instrumentation.enabled</code></h4><a class="edit_me" rel="nofollow" title="Edit this page on GitHub" href="https://github.com/elastic/apm-server/edit/7.11/docs/configuration-process.asciidoc">edit</a></div>
<p>Enables self instrumentation of the APM Server itself.
Disabled by default.</p>
<div class="position-relative"><h4><a id="register.ingest.pipeline.enabled"></a><code class="literal">register.ingest.pipeline.enabled</code></h4><a class="edit_me" rel="nofollow" title="Edit this page on GitHub" href="https://github.com/elastic/apm-server/edit/7.11/docs/configuration-process.asciidoc">edit</a></div>
<p>Loads the default pipeline definition to Elasticsearch on APM Server startup.
Defaults to true.</p>
<div class="position-relative"><h4><a id="register.ingest.pipeline.overwrite"></a><code class="literal">register.ingest.pipeline.overwrite</code></h4><a class="edit_me" rel="nofollow" title="Edit this page on GitHub" href="https://github.com/elastic/apm-server/edit/7.11/docs/configuration-process.asciidoc">edit</a></div>
<p>Overwrites the existing APM pipeline definition in Elasticsearch.
Defaults to false.</p>
<div class="position-relative"><h3><a id="_configuration_options_queue_mem"></a>Configuration options: <code class="literal">queue.mem.*</code></h3><a class="edit_me" rel="nofollow" title="Edit this page on GitHub" href="https://github.com/elastic/apm-server/edit/7.11/docs/configuration-process.asciidoc">edit</a></div>
<p>Data is buffered in a memory queue before it is published to the configured output.
<code class="literal">queue.mem.*</code> settings modify the queue behavior.</p>
<div class="position-relative"><h4><a id="mem.events"></a><code class="literal">events</code></h4><a class="edit_me" rel="nofollow" title="Edit this page on GitHub" href="https://github.com/elastic/apm-server/edit/7.11/docs/configuration-process.asciidoc">edit</a></div>
<p>Maximum number of events the memory queue can buffer.
Read more about how this setting can be used for <a class="xref" href="tune-data-ingestion.html" title="Tune data ingestion">tuning data ingestion</a>.
Default value is 4096.</p>
<div class="position-relative"><h4><a id="mem.flush.min_events"></a><code class="literal">flush.min_events</code></h4><a class="edit_me" rel="nofollow" title="Edit this page on GitHub" href="https://github.com/elastic/apm-server/edit/7.11/docs/configuration-process.asciidoc">edit</a></div>
<p>Hints the minimum number of events stored in the queue,
before providing a batch of events to the outputs.
A value of 0 (the default) ensures events are immediately available to be sent to the outputs.</p>
<div class="position-relative"><h4><a id="mem.flush.timeout"></a><code class="literal">flush.timeout</code></h4><a class="edit_me" rel="nofollow" title="Edit this page on GitHub" href="https://github.com/elastic/apm-server/edit/7.11/docs/configuration-process.asciidoc">edit</a></div>
<p>Maximum duration after which events are available to the outputs,
if the number of events stored in the queue is &lt; <code class="literal">flush.min_events</code>.
Default value is 1 second.</p>
<div class="position-relative"><h3><a id="_configuration_options_max_procs"></a>Configuration options: <code class="literal">max_procs</code></h3><a class="edit_me" rel="nofollow" title="Edit this page on GitHub" href="https://github.com/elastic/apm-server/edit/7.11/docs/configuration-process.asciidoc">edit</a></div>
<div class="position-relative"><h4><a id="max_procs"></a><code class="literal">max_procs</code></h4><a class="edit_me" rel="nofollow" title="Edit this page on GitHub" href="https://github.com/elastic/apm-server/edit/7.11/docs/configuration-process.asciidoc">edit</a></div>
<p>Sets the maximum number of CPUs that can be executing simultaneously.
The default is the number of logical CPUs available in the system.</p>
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