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DNS Cache In Glassfish 3.1.1

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Joined: 2007-09-08

The performance tuning guide in glassfish 3.1.1 documentation states that the DNS (domain name server) is enabled by enabling the DNS lookup option. Below are some doubts/queries I have on this topic

1. The guide mentions that the DNS statistics are displayed on the monitoring page. I enabled the DNS lookup option but couldn't see the DNS statistics page under Monitor tab of the admin console. Where can I see the statistics?

2. The guide mentions that the DNS entries are stored in the file cache. Isn't the file cache used to cache static content which I assume are images, js, css files etc?

3. It also mentions about limit DNS lookups to asynchronous. What does asynchronous DNS lookup mean and how can this configuration be done?