Hi, we have Moodle 2.1.1 in our organization, the login, access and navigation to different pages is quite fine for normal users but for Admin accounts it is just really slow. The thing is when I login as admin, it just loads for few minutes and eventually times out. I had to stop loading and refresh the page, then it displays the home page. Once logged in navigation to pages is normal but once logging out and if i had to log back in I had to do the same things again. Similarly it happens if i click on the "Notifications" section, it just loads for few minutes and times out.
I have read many posts like this from many Moodle users but none of them mentioned a concrete solution to this.
I have made some configuration changes as mentioned in this article http://opensourceelearning.blogspot.com.au/2012/10/why-your-moodle-site-is-slow-five.html but it didn't make any difference at all. One thing to mention is the size of the mdl_log file is 420 MB and the performance issue is due to that? If so is it ok to just delete the entries that are old and keep just 1 week or 1 month worth of logs?
Can anyone suggest things to resolve this issue. Any help would be much appreciated.