I am using NIO/APR Connector for Tomcat7. 

E.g.

```
<Connector port="8080" 
        protocol="org.apache.coyote.http11.Http11AprProtocol" 
        connectionTimeout="3000"
        redirectPort="8443" 
        URIEncoding="UTF-8" 
        maxPostSize="0"
        maxThreads="200"
        enableLookups="false"
        disableUploadTimeout="false"
        maxKeepAliveRequests="-1"
        useBodyEncodingForURI="true"
        compression="on"
        compressableMimeType="text/html,text/xml,text/javascript,text/css,text/plain"   
        />

```

1. How can I determine the optimal size of the maxThreads of my NIO/APR Connector for Tomcat?
2. What is a good starting value for maxThreads?