10.3 Tuning Apache Tomcat Threads

When monitoring with a large number of Agent processes deployed, the default number of threads that are created within the Apache Tomcat server may not be sufficient. By default, it is configured to create 150 threads to communicate with the HTTPS port.

This is configured with the maxThreads setting within the server.xml configuration file*:

Table 10.5 Apache Tomcat configuration file location (default)

Operating System	Path
Microsoft Windows	C:\Program Files\MySQL\Enterprise\Monitor\apache-tomcat\conf\server.xml
Linux / Unix	/opt/mysql/enterprise/monitor/apache-tomcat/conf/server.xml
macOS	/Applications/mysql/enterprise/monitor/apache-tomcat/conf/server.xml

Edit the following section:

<Connector port="18443" 
  protocol="org.apache.coyote.http11.Http11Protocol" SSLEnabled="true"
  maxThreads="150" minSpareThreads="25" maxSpareThreads="75"

...

A good baseline to test is the number of Agents that you have checking in to the Service Manager plus 50. For example if you have 150 Agents checking in, set the maxThreads variable to 200.