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<article class="doc">
<h1 class="page">Calculating Che resource requirements</h1>
<div id="preamble">
<div class="sectionbody">
<div class="paragraph">
<p>The Che Operator, Dev Workspace Controller, and user workspaces consist of a set of pods. The pods contribute to the resource consumption in terms of CPU and RAM limits and requests. Learn how to calculate resources, such as memory and CPU, required to run Eclipse&#160;Che.</p>
</div>
</div>
</div>
<div class="sect1">
<h2 id="operator-requirements_che"><a class="anchor" href="#operator-requirements_che"></a>Che Operator requirements</h2>
<div class="sectionbody">
<div class="paragraph">
<p>The Che Operator manages six operands running in six distinct pods. The following table presents the default resource requirements of each of these operands.</p>
</div>
<table class="tableblock frame-all grid-all stretch">
<caption class="title">Table 1. Che operator operands</caption>
<colgroup>
<col style="width: 33.3333%;">
<col style="width: 33.3333%;">
<col style="width: 16.6666%;">
<col style="width: 16.6668%;">
</colgroup>
<thead>
<tr>
<th class="tableblock halign-left valign-top">Pod</th>
<th class="tableblock halign-left valign-top">Container names</th>
<th class="tableblock halign-left valign-top">Default memory limit</th>
<th class="tableblock halign-left valign-top">Default memory request</th>
</tr>
</thead>
<tbody>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock">Che Server</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">Che</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">1 Gi</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">512 MiB</p></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock">Che Gateway</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock"><code>gateway</code>, <code>configbump</code>, <code>oauth-proxy</code>, <code>kube-rbac-proxy</code></p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">4 Gi, 256Mi, 512Mi, 512Mi</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">128 Mi, 64Mi, 64Mi, 64Mi</p></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock">Che Dashboard</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock"><code>Che-dashboard</code></p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">256 Mi</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">32 Mi</p></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock">PostgreSQL</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock"><code>postgres</code></p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">1 Gi</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">512 Mi</p></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock">Devfile registry</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock"><code>che-devfile-registry</code></p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">256 Mi</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">32 Mi</p></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock">Plug-in registry</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock"><code>che-plugin-registry</code></p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">256 Mi</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">32 Mi</p></td>
</tr>
</tbody>
</table>
<div class="paragraph">
<p>The Che Operator, which powers all the operands, consists of a single container with the <code>64Mi</code> memory request and <code>256Mi</code> limit. These default values are sufficient when the Che Operator manages a relatively big amount of Che workspaces. For even larger deployments, consider increasing the defaults.</p>
</div>
<div class="ulist">
<div class="title">Additional resources</div>
<ul>
<li>
<p><a href="../architecture-overview/" class="xref page">Che architecture</a>.</p>
</li>
</ul>
</div>
</div>
</div>
<div class="sect1">
<h2 id="controller-requirements_che"><a class="anchor" href="#controller-requirements_che"></a>Dev Workspace Operator requirements</h2>
<div class="sectionbody">
<div class="paragraph">
<p>The Dev Workspace Operator consists of 3 pods. The following table presents the default resource requirements of each of these pods.</p>
</div>
<table class="tableblock frame-all grid-all stretch">
<caption class="title">Table 2. Dev Workspace Operator Pods</caption>
<colgroup>
<col style="width: 33.3333%;">
<col style="width: 33.3333%;">
<col style="width: 16.6666%;">
<col style="width: 16.6668%;">
</colgroup>
<thead>
<tr>
<th class="tableblock halign-left valign-top">Pod</th>
<th class="tableblock halign-left valign-top">Container name</th>
<th class="tableblock halign-left valign-top">Default memory limit</th>
<th class="tableblock halign-left valign-top">Default memory request</th>
</tr>
</thead>
<tbody>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock">Dev Workspace Controller Manager</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock"><code>Dev Workspace-controller</code>, <code>kube-rbac-proxy</code></p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">1 Gi</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">100 Mi</p></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock">Dev Workspace Operator Catalog</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock"><code>registry-server</code></p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">N/A</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">50 Mi</p></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock">Dev Workspace Webhook Server</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock"><code>webhook-server}</code>, kube-rbac-proxy</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">300 Mi</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">20 Mi</p></td>
</tr>
</tbody>
</table>
<div class="paragraph">
<p>These default values are sufficient when the Dev Workspace Controller manages a relatively big amount of Che workspaces. For larger deployments, consider increasing the defaults.</p>
</div>
<div class="ulist">
<div class="title">Additional resources</div>
<ul>
<li>
<p><a href="../architecture-overview/" class="xref page">Che architecture</a>.</p>
</li>
</ul>
</div>
</div>
</div>
<div class="sect1">
<h2 id="workspaces-requirements_che"><a class="anchor" href="#workspaces-requirements_che"></a>Workspaces requirements</h2>
<div class="sectionbody">
<div class="paragraph">
<p>This section describes how to calculate the resources required for a workspace. That is the sum of the resources required for each container of the workspace.</p>
</div>
<div class="olist arabic">
<div class="title">Procedure</div>
<ol class="arabic">
<li>
<p>Identify the workspace components explicitly specified in the <code>components</code> section of the devfile.</p>
</li>
<li>
<p>Identify the implicit workspace components.</p>
</li>
</ol>
</div>
<div class="admonitionblock note">
<table>
<tr>
<td class="icon">
<i class="fa icon-note" title="Note"></i>
</td>
<td class="content">
Che implicitly loads the default <code>theia-ide</code>, <code>che-machine-exec</code>, <code>che-gateway</code> containers.
</td>
</tr>
</table>
</div>
<div class="olist arabic">
<ol class="arabic">
<li>
<p>Calculate the requirements for each component.</p>
</li>
</ol>
</div>
<div class="ulist">
<div class="title">Additional resources</div>
<ul>
<li>
<p><a href="../architecture-overview/" class="xref page">Che architecture</a>.</p>
</li>
</ul>
</div>
</div>
</div>
<div class="sect1">
<h2 id="a-workspace-example_che"><a class="anchor" href="#a-workspace-example_che"></a>A workspace example</h2>
<div class="sectionbody">
<div class="paragraph">
<p>This section describes a Che workspace example.</p>
</div>
<div class="paragraph">
<p>The following devfile defines the Che workspace:</p>
</div>
<div class="listingblock">
<div class="content">
<pre class="highlightjs highlight"><code class="language-yaml hljs" data-lang="yaml">schemaVersion: 2.1.0
metadata:
name: bash
components:
- name: tools
container:
image: quay.io/devfile/universal-developer-image:ubi8-0e189d9
memoryLimit: 4Gi
commands:
- id: run-main-script
exec:
label: "Run main.sh script"
component: tools
workingDir: '${PROJECT_SOURCE}'
commandLine: |
./main.sh
group:
kind: run
isDefault: true</code></pre>
</div>
</div>
<div class="paragraph">
<p>This table provides the memory requirements for each workspace component:</p>
</div>
<table class="tableblock frame-all grid-all stretch">
<caption class="title">Table 3. Total workspace memory requirement and limit</caption>
<colgroup>
<col style="width: 16.6666%;">
<col style="width: 50%;">
<col style="width: 16.6666%;">
<col style="width: 16.6668%;">
</colgroup>
<thead>
<tr>
<th class="tableblock halign-left valign-top">Pod</th>
<th class="tableblock halign-left valign-top">Container name</th>
<th class="tableblock halign-left valign-top">Default memory limit</th>
<th class="tableblock halign-left valign-top">Default memory request</th>
</tr>
</thead>
<tbody>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock">Workspace</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock"><code>theia-ide</code></p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">512 Mi</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">64 Mi</p></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock">Workspace</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock"><code>machine-exec</code></p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">128 Mi</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">32 Mi</p></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock">Workspace</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock"><code>tools</code></p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">4 Gi</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">64 Mi</p></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock">Workspace</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock"><code>che-gateway</code></p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">256 Mi</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">64 Mi</p></td>
</tr>
<tr>
<td class="tableblock halign-right valign-top" colspan="2"><p class="tableblock"><strong>Total</strong></p></td>
<td class="tableblock halign-right valign-top"><p class="tableblock"><strong>4.9 Gi</strong></p></td>
<td class="tableblock halign-right valign-top"><p class="tableblock"><strong>224 Mi</strong></p></td>
</tr>
</tbody>
</table>
<div class="ulist">
<div class="title">Additional resources</div>
<ul>
<li>
<p><a href="../architecture-overview/" class="xref page">Che architecture</a></p>
</li>
<li>
<p><a href="../understanding-the-checluster-custom-resource/" class="xref page">Understanding the <code>CheCluster</code> Custom Resource</a></p>
</li>
<li>
<p><a href="https://github.com/eclipse-che/che-plugin-registry">Che plug-ins registry repository</a></p>
</li>
<li>
<p><a href="https://kubernetes.io/docs/concepts/configuration/manage-resources-containers/">Kubernetes resource management for pods and containers</a></p>
</li>
</ul>
</div>
</div>
</div>
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