Stats question

For a backend running in http mode what exactly do the following metrics include?

1. dreq: denied requests - apparently only for FE. What does this include?
2. dresp: denied responses
3. ereq: request errors - What does this include?
4. econ: connection errors

Does the above include connection failures due to maxconn limits? Entries that expired from the queue?

1. eresp: response errors

Does the above mean HTTP status codes or some other kinds of errors?

When hovering a mouse over Session Total I can see a tool-tip with a http codes breakdown. Is there a way I can get those via http interface or some other means?

thanks,

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Dmitri Smirnov