diff --git a/doc/puppet_classes/prometheus_cd_3A_3Aparams.html b/doc/puppet_classes/prometheus_cd_3A_3Aparams.html
index 28973b8..9ca1221 100644
--- a/doc/puppet_classes/prometheus_cd_3A_3Aparams.html
+++ b/doc/puppet_classes/prometheus_cd_3A_3Aparams.html
@@ -376,6 +376,96 @@
         —
         <div class='inline'>
 <p>WAL segment size</p>
+</div>
+      
+    </li>
+  
+    <li>
+      
+        <span class='name'>ps_max_mem</span>
+      
+      
+        <span class='type'>(<tt>String</tt>)</span>
+      
+      
+        <em class="default">(defaults to: <tt>&#39;6G&#39;</tt>)</em>
+      
+      
+        &mdash;
+        <div class='inline'>
+<p>hard memory ceiling</p>
+</div>
+      
+    </li>
+  
+    <li>
+      
+        <span class='name'>ps_high_mem</span>
+      
+      
+        <span class='type'>(<tt>String</tt>)</span>
+      
+      
+        <em class="default">(defaults to: <tt>&#39;5G&#39;</tt>)</em>
+      
+      
+        &mdash;
+        <div class='inline'>
+<p>soft limit to make kernel reclaim earlier</p>
+</div>
+      
+    </li>
+  
+    <li>
+      
+        <span class='name'>ps_swap_mem</span>
+      
+      
+        <span class='type'>(<tt>String</tt>)</span>
+      
+      
+        <em class="default">(defaults to: <tt>&#39;4G&#39;</tt>)</em>
+      
+      
+        &mdash;
+        <div class='inline'>
+<p>allow swap, but limit it</p>
+</div>
+      
+    </li>
+  
+    <li>
+      
+        <span class='name'>ps_oom_score</span>
+      
+      
+        <span class='type'>(<tt>String</tt>)</span>
+      
+      
+        <em class="default">(defaults to: <tt>&#39;500&#39;</tt>)</em>
+      
+      
+        &mdash;
+        <div class='inline'>
+<p>OOM killer choosing prometheus</p>
+</div>
+      
+    </li>
+  
+    <li>
+      
+        <span class='name'>ps_max_procs</span>
+      
+      
+        <span class='type'>(<tt>String</tt>)</span>
+      
+      
+        <em class="default">(defaults to: <tt>&#39;1&#39;</tt>)</em>
+      
+      
+        &mdash;
+        <div class='inline'>
+<p>reduce parallel WAL replay workers</p>
 </div>
       
     </li>
@@ -391,11 +481,6 @@
         <pre class="lines">
 
 
-21
-22
-23
-24
-25
 26
 27
 28
@@ -440,10 +525,22 @@
 67
 68
 69
-70</pre>
+70
+71
+72
+73
+74
+75
+76
+77
+78
+79
+80
+81
+82</pre>
       </td>
       <td>
-        <pre class="code"><span class="info file"># File 'manifests/params.pp', line 21</span>
+        <pre class="code"><span class="info file"># File 'manifests/params.pp', line 26</span>
 
 class prometheus_cd::params (
 
@@ -472,6 +569,13 @@ class prometheus_cd::params (
   String $ps_retention_size     = &#39;20GB&#39;,
   String $ps_wal_seg_size       = &#39;50MB&#39;,
 
+  # service
+  String $ps_max_mem            = &#39;6G&#39;,
+  String $ps_high_mem           = &#39;5G&#39;,
+  String $ps_swap_mem           = &#39;4G&#39;,
+  String $ps_oom_score          = &#39;500&#39;,
+  String $ps_max_procs          = &#39;1&#39;,
+
 ) {
   # defaults
   $fqdn                   = $facts[&#39;networking&#39;][&#39;fqdn&#39;]