Magento admin backend is very slow even with fresh installation
The Magento admin backend is very slow with fresh installation of the same version 1.7.0.2.
With my previous installation, it was working perfectly fine with reasonably good speed on the same server with same hosting company and no additional tweaks at all.
But suddenly I messed up with it due to another custom theme that I installed. So I reinstalled it after removing it. Then I found more problems in even accessing it.
Hence, I created new public_html folder and rename the previous one to public_html.old.
Then I was able to reinstall the Magento successfully on the root folder. But this time it is opening very very slow, in fact, every step is slow.
Can anybody help me to trace the actual reason. What could be the possibilities. It was working fine earlier but why not this time.
Answer
I know this is an old issue, but many people are still using 1.7.0.2, so I think it's still relevant.
The performance lag described makes the system unusable, and it's definitely not just the standard tweaks that can fix it. It's a bug with such an easy "work around" if you can call it that, that fixing it was likely a low priority. But I didn't find this work around easily. So I'm posting here.
My Setup:
- MacBook Pro
- Vagrant set with NFS on VirtualBox
- VM of Ubuntu 12.4
- LAMP
- Magento 1.7.0.2
- Adequate RAM etc
The Issue
I was getting 8 to 12 second page loads on the admin interface. Typical performance when working right was about 1 second loads.
Diagnosis
I ran the Magento Profiler: see http://www.neptuneweb.com/blog/?id=24
- First, enable the profiler via System -> Configuration -> Developer -> Profile (yes). This enables the profiler, but does not fill in any of the benchmark times.
- Find the commented out line in /index.php around line 71
- Uncomment this line to enable profiler. "Varien_Profiler::enable();"
- Refresh the page you are optimizing. At the bottom of the page, you will see the performance table.
In my case, the profiler table (not sortable unfortunately) showed very late times for the "adminhtml/default/default/template/notification/survey.phtml"
It seems to show you a time stamp starting at 0 when the request comes in, to whatever mark for each tracked event. In this way, you can't see how long something took to process and return. But you can tell when it finished and by subtracting the next highest time of a different process, you can (kind of) tell how long it took. Likely there is some asymmetrical processing going on to complicate things. But since some probably have dependencies they wait on, this seems to work ok.
Solution
- Upon loading the admin interface again, I noticed the nag bar on top asking me to fill out a survey to send back to Magento. Upon dismissing that notice, everything became quick...
So, it was a painfully easy resolution for me after much troubleshooting. But if that's not that exact cause for you, or the popup doesn't appear, the troubleshooting info should help find what is.
The profiler is also a great tool to help optimize page loads even when it's working more or less ok.