> We recently installed ELOG and it works pretty well, but the load times are rather inconsistent. Most of the time 
> it is very fast, but it also often hangs for around 5-10 seconds while loading. It seems to affect all parts of 
> the page that are returned at random, so sometimes the main html file will hang, sometimes the css file and 
> sometimes the images.
> 
> The hardware it is running on is nothing special, an older 3 GHz Celeron, but it should be fast enough. It is 
> running on Debian 7. 
> 
> Any ideas what the problem could be, or how I could investigate it further to find the bottleneck?

I'm not an expert in debugging web applications. Here are my two cent:
We once had a problem when we hosted very large logbooks (several 10 thousands of entries) that the server would run
out of real memory and was slowed down by swapping. Therefore my first idea would be to monitor the server: Is
the CPU load peaking? What happens with the memory consumption? Any other suspicious process running on the server?
But it could be as well a network or browser problem. Did you try different browsers?
Did you check the elogd log file?