Slow performance after upgrade to 3.3.3

[ashley420]

Hi,

I have recently upgraded our OTRS Helpdesk with ITSM installation to V3.3.3. I followed the following guide http://doc.otrs.org/3.3/en/html/upgrading.html.
Upgrade was successful without any errors and everything worked as expected during small tests after upgrade on weekend.
Problem started when users started using the system today morning. I get complaints that the login page will not load or it takes a long time to load. I checked in Support assessment and all 4 checks for Database, OS, OTRS and Webserver shows everything as green. I also enabled performance logs and it shows AgentDashboard takes max. 21s to respond. I am not sure how to proceed to troubleshoot for the same.
Any help is highly appreciated.

Thanks

[ashley420]

Hi,

I forgot to mention a couple of things earlier:-

1. I am using AD as customer and agent backend.
2. Running Apache with NTLM SSO.

I have noticed that when I take off the following lines from httpd.conf agent interface works fine, but customer interface show error for loop redirects.

<Location /otrs>
PerlAuthenHandler Apache2::AuthenNTLM
AuthType ntlm,basic
AuthName Basic
require valid-user
PerlAddVar ntdomain "DOMAIN DomainController"
PerlSetVar defaultdomain DOMAIN
PerlSetVar splitdomainprefix 1
PerlSetVar ntlmdebug 0
PerlSetVar ntlmauthoritative off
</Location>

Any pointers/help is much appreciated.