Add notes for 2018-01-12

This commit is contained in:
Alan Orth 2018-01-12 07:55:01 +02:00
parent 21acf07165
commit 2039917254
Signed by: alanorth
GPG Key ID: 0FB860CC9C45B1B9
4 changed files with 75 additions and 11 deletions

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@ -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` - 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

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

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@ -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: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", "@type": "BlogPosting",
"headline": "January, 2018", "headline": "January, 2018",
"url": "https://alanorth.github.io/cgspace-notes/2018-01/", "url": "https://alanorth.github.io/cgspace-notes/2018-01/",
"wordCount": "2467", "wordCount": "2630",
"datePublished": "2018-01-02T08:35:54-08:00", "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": { "author": {
"@type": "Person", "@type": "Person",
"name": "Alan Orth" "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> <li>With that it is super easy to see where PostgreSQL connections are coming from in <code>pg_stat_activity</code></li>
</ul> </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>

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@ -4,7 +4,7 @@
<url> <url>
<loc>https://alanorth.github.io/cgspace-notes/2018-01/</loc> <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>
<url> <url>
@ -14,7 +14,7 @@
<url> <url>
<loc>https://alanorth.github.io/cgspace-notes/2017-11/</loc> <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>
<url> <url>
@ -144,7 +144,7 @@
<url> <url>
<loc>https://alanorth.github.io/cgspace-notes/</loc> <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> <priority>0</priority>
</url> </url>
@ -155,7 +155,7 @@
<url> <url>
<loc>https://alanorth.github.io/cgspace-notes/tags/notes/</loc> <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> <priority>0</priority>
</url> </url>
@ -167,13 +167,13 @@
<url> <url>
<loc>https://alanorth.github.io/cgspace-notes/post/</loc> <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> <priority>0</priority>
</url> </url>
<url> <url>
<loc>https://alanorth.github.io/cgspace-notes/tags/</loc> <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> <priority>0</priority>
</url> </url>