Add notes for 2018-01-12

content/post/2018-01.md

@@ -516,3 +516,33 @@ db.url = jdbc:postgresql://localhost:5432/dspacetest?ApplicationName=dspaceDefau
 ```
 
 - With that it is super easy to see where PostgreSQL connections are coming from in `pg_stat_activity`
+
+## 2018-01-12
+
+- I'm looking at the [DSpace 6.0 Install docs](https://wiki.duraspace.org/display/DSDOC6x/Installing+DSpace#InstallingDSpace-ServletEngine(ApacheTomcat7orlater,Jetty,CauchoResinorequivalent)) and notice they tweak the number of threads in their Tomcat connector:
+
+```
+<!-- Define a non-SSL HTTP/1.1 Connector on port 8080 -->
+<Connector port="8080"
+           maxThreads="150"
+           minSpareThreads="25"
+           maxSpareThreads="75"
+           enableLookups="false"
+           redirectPort="8443"
+           acceptCount="100"
+           connectionTimeout="20000"
+           disableUploadTimeout="true"
+           URIEncoding="UTF-8"/>
+```
+
+- In Tomcat 8.5 the `maxThreads` defaults to 200 which is probably fine, but tweaking `minSpareThreads` could be good
+- I don't see a setting for `maxSpareThreads` in the docs so that might be an error
+- Looks like in Tomcat 8.5 the default URIEncoding for Connectors is UTF-8, so we don't need to specify that manually anymore: https://tomcat.apache.org/tomcat-8.5-doc/config/http.html
+- 
+- Ooh, I just the `acceptorThreadCount` setting (in Tomcat 7 and 8.5):
+
+```
+The number of threads to be used to accept connections. Increase this value on a multi CPU machine, although you would never really need more than 2. Also, with a lot of non keep alive connections, you might want to increase this value as well. Default value is 1.
+```
+
+- That could be very interesting

public/2017-11/index.html

@@ -38,7 +38,7 @@ COPY 54701
 
 <meta property="article:published_time" content="2017-11-02T09:37:54&#43;02:00"/>
 
-<meta property="article:modified_time" content="2017-12-17T10:43:56&#43;02:00"/>
+<meta property="article:modified_time" content="2018-01-12T06:07:03&#43;02:00"/>
 
 
 
@@ -88,7 +88,7 @@ COPY 54701
   "url": "https://alanorth.github.io/cgspace-notes/2017-11/",
   "wordCount": "5428",
   "datePublished": "2017-11-02T09:37:54&#43;02:00",
-  "dateModified": "2017-12-17T10:43:56&#43;02:00",
+  "dateModified": "2018-01-12T06:07:03&#43;02:00",
   "author": {
     "@type": "Person",
     "name": "Alan Orth"

public/2018-01/index.html

@@ -92,7 +92,7 @@ Danny wrote to ask for help renewing the wildcard ilri.org certificate and I adv
 
 <meta property="article:published_time" content="2018-01-02T08:35:54-08:00"/>
 
-<meta property="article:modified_time" content="2018-01-11T10:42:35&#43;02:00"/>
+<meta property="article:modified_time" content="2018-01-12T06:07:03&#43;02:00"/>
 
 
 
@@ -194,9 +194,9 @@ Danny wrote to ask for help renewing the wildcard ilri.org certificate and I adv
   "@type": "BlogPosting",
   "headline": "January, 2018",
   "url": "https://alanorth.github.io/cgspace-notes/2018-01/",
-  "wordCount": "2467",
+  "wordCount": "2630",
   "datePublished": "2018-01-02T08:35:54-08:00",
-  "dateModified": "2018-01-11T10:42:35&#43;02:00",
+  "dateModified": "2018-01-12T06:07:03&#43;02:00",
   "author": {
     "@type": "Person",
     "name": "Alan Orth"
@@ -821,6 +821,40 @@ cache_alignment : 64
 <li>With that it is super easy to see where PostgreSQL connections are coming from in <code>pg_stat_activity</code></li>
 </ul>
 
+<h2 id="2018-01-12">2018-01-12</h2>
+
+<ul>
+<li>I&rsquo;m looking at the <a href="https://wiki.duraspace.org/display/DSDOC6x/Installing+DSpace#InstallingDSpace-ServletEngine(ApacheTomcat7orlater,Jetty,CauchoResinorequivalent)">DSpace 6.0 Install docs</a> and notice they tweak the number of threads in their Tomcat connector:</li>
+</ul>
+
+<pre><code>&lt;!-- Define a non-SSL HTTP/1.1 Connector on port 8080 --&gt;
+&lt;Connector port=&quot;8080&quot;
+           maxThreads=&quot;150&quot;
+           minSpareThreads=&quot;25&quot;
+           maxSpareThreads=&quot;75&quot;
+           enableLookups=&quot;false&quot;
+           redirectPort=&quot;8443&quot;
+           acceptCount=&quot;100&quot;
+           connectionTimeout=&quot;20000&quot;
+           disableUploadTimeout=&quot;true&quot;
+           URIEncoding=&quot;UTF-8&quot;/&gt;
+</code></pre>
+
+<ul>
+<li>In Tomcat 8.5 the <code>maxThreads</code> defaults to 200 which is probably fine, but tweaking <code>minSpareThreads</code> could be good</li>
+<li>I don&rsquo;t see a setting for <code>maxSpareThreads</code> in the docs so that might be an error</li>
+<li>Looks like in Tomcat 8.5 the default URIEncoding for Connectors is UTF-8, so we don&rsquo;t need to specify that manually anymore: <a href="https://tomcat.apache.org/tomcat-8.5-doc/config/http.html">https://tomcat.apache.org/tomcat-8.5-doc/config/http.html</a></li>
+<li></li>
+<li>Ooh, I just the <code>acceptorThreadCount</code> setting (in Tomcat 7 and 8.5):</li>
+</ul>
+
+<pre><code>The number of threads to be used to accept connections. Increase this value on a multi CPU machine, although you would never really need more than 2. Also, with a lot of non keep alive connections, you might want to increase this value as well. Default value is 1.
+</code></pre>
+
+<ul>
+<li>That could be very interesting</li>
+</ul>
+
   
 
   

public/sitemap.xml

@@ -4,7 +4,7 @@
   
   <url>
     <loc>https://alanorth.github.io/cgspace-notes/2018-01/</loc>
-    <lastmod>2018-01-11T10:42:35+02:00</lastmod>
+    <lastmod>2018-01-12T06:07:03+02:00</lastmod>
   </url>
   
   <url>
@@ -14,7 +14,7 @@
   
   <url>
     <loc>https://alanorth.github.io/cgspace-notes/2017-11/</loc>
-    <lastmod>2017-12-17T10:43:56+02:00</lastmod>
+    <lastmod>2018-01-12T06:07:03+02:00</lastmod>
   </url>
   
   <url>
@@ -144,7 +144,7 @@
   
   <url>
     <loc>https://alanorth.github.io/cgspace-notes/</loc>
-    <lastmod>2018-01-11T10:42:35+02:00</lastmod>
+    <lastmod>2018-01-12T06:07:03+02:00</lastmod>
     <priority>0</priority>
   </url>
   
@@ -155,7 +155,7 @@
   
   <url>
     <loc>https://alanorth.github.io/cgspace-notes/tags/notes/</loc>
-    <lastmod>2018-01-11T10:42:35+02:00</lastmod>
+    <lastmod>2018-01-12T06:07:03+02:00</lastmod>
     <priority>0</priority>
   </url>
   
@@ -167,13 +167,13 @@
   
   <url>
     <loc>https://alanorth.github.io/cgspace-notes/post/</loc>
-    <lastmod>2018-01-11T10:42:35+02:00</lastmod>
+    <lastmod>2018-01-12T06:07:03+02:00</lastmod>
     <priority>0</priority>
   </url>
   
   <url>
     <loc>https://alanorth.github.io/cgspace-notes/tags/</loc>
-    <lastmod>2018-01-11T10:42:35+02:00</lastmod>
+    <lastmod>2018-01-12T06:07:03+02:00</lastmod>
     <priority>0</priority>
   </url>