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