Job Browser Through Hue Very Slow

When I log into to Hue, and try to view the logs for a workflow instance 
that has completed, it takes about 45 seconds to 1 minute to load. Any idea 
what I can do to improve this?
When I click on this link, it's very slow:
http://myserver:8888/jobbrowser/jobs/job_1456772850577_44267/single_logs
I went through a few cloudera KB articles, I've purged old log files 
/var/log/oozie. I went to oozie config, and it's set to purge any completed 
workflows older than 14 days.
Both our HUE and oozie is using mysql as backend database.
What else can I do?
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