STRATUS WebUI is very slow to respond with no apparent overload on server

STRATUS WebUI is very slow to respond with no apparent overload on server

If you experience strange unresponsive WebUI while you do not have much load on the server (if any), the very likely suspect is in DNS configuration on the server side.

The easiest to check is to connect to your server over SSH as "sos" user and to check option #1 ("Show status"): it will report connection status of the DNS servers configured on the system. 

Normally it should have something similar to:

nameserver xxx.xxx.xxx.xxx      : OK
nameserver xxx.xxx.xxx.xxx      : OK

If you have error message next to any entry here, please check with your network administrator on correct values to be used and/or perform network connection and/or firewall troubleshooting.

Alternatively, if you do not have "sos menu" installed during STRATUS activation by your system administrator, relevant Linux configuration files are:

/etc/sysconfig/network-scripts/ifcfg-eth0 (look for "DNS1=" / "DNS2=" keys if present)
/etc/resolv.conf (look for "nameserver" entries)