QUESTION SESSION exists and session_start() already called

[vanfruniken]

Did you check whats in the session? Maybe php auto sessions ?

What I see in the $_SESSION variable is not much
Don't know about "cat", but "p01contact" comes from a plugin that's installed.
"fvVar" is my associative array, which I create.
{ "cat":null,
  "p01contact":{"pageloads":[1520354514,1520354516]},
  "fvVar":{ 
       "ipDns": { "server":{"ip":"8.7.6.5","dns":"do.main.be"},  "client":{"ip":"11.22.33.44","dns":"dom.ain.be"} }
       "geoIp": { ... }, 
       "expirationTime": 123...45
 }  }
At some point, I struggled with excessive memory usage: hundreds of MBs, overflowing the server limit and slowing down the pages, but with some cleaner programming, it remains stable at 5MB. Don't know why exactly it is better now. I didn't need to use session_start().