Apex Pages and tool based on it is very slow

Hi All,
I am using Apex 3.2 with Oracle 11g and facing lot of performance issues.
Presently a tool built on Apex has become very slow. We checked from PL/SQL point of view everything seems to be fine.
Mainly we face issue when trying to select Data from Apex collection. This we are facing for last 3-4 weeks. Earlier it was good.
Details of the application.
We are using Dedicated Server
On an average we have 30-40 users
Tables from where data is being fetched is not so big.
All the tables are being analyzed on daily basis
The same application on other environment is working perfectly
Please suggest where shall I check to increase the performance.
Thanks in Advance
Regards,
Zaif

The Apple server a likely overloaded with the IOS 8.3 update.
You can try using these instructions but select iOS 6.1.6 for the 4G iPod. If yo select any other file you will get errors:
How to Install iOS 8.1.3 Update on your iPhone, iPad and iPod touch
Use the Step 5 update using iTunes instructions but download the iOS 6.1.6 firmware for the 4G iPod. Note that if you try to restore to earlier than 6.1.6 you will only get errors

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