I would like to understand the parameters shown in the HAProxy stats web interface.
What's maxsock parameter about? And current conns in general process information´? Why it isn't the same as current sessions in backend?
I have Google Analytics too, monitoring our website, but the users in Analytics and sessions are not the same.
The maxsock value is the maximum number of sockets that the HAProxy process can create. On most installations I've seen, it's exactly equal to the value for ulimit-n, meaning it's automatically computed.
ulimit-n [number]
Sets the maximum number of per-process file-descriptors to [number]. By default, it is automatically computed, so it is recommended not to use this option.
As for current conn, that's the sum total of all inbound connections to the process. If you add up the scur (in CSV) or Session - Cur (in the web interface) for all Listen or Frontend blocks, you'll find that the numbers are identical.
Google Analytics doesn't have the same view of your website, so the numbers should be close-ish but not identical.
