How to troubleshoot forms performance issues in R12.2

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Normally we are getting email/tickets to DEV/PROD instance application,forms are opening slow. those are very frequent issue we expected from devlopment and functional team.

Before troubleshooting first we need to understand the issue so collect the below basic information from Users.

1) Is it slow for all users OR specific users OR slow for specific site/locations?

2) Any specific operation being performed which is making application slow?

3) What part of application is slow: HTTP pages, Forms, All etc?

4) If forms, then are these seeded or custom?

5) If seeded forms ask any customization causing issue

6) Can screenshot or navigation be provide so that DBA can replicate?

7) Is it constantly slow or slow at specific time of the day?

Scenario-1:

If all forms are opening slowly in particular machine?

1. Need to Clear internet browser history and cache.

Go to IE->Internet options->Delete browsing history.

2. Then need to check particular machine bandwidth connection/Machine configuration/speed.

Scenario-2

If facing issues all users?

1. Check server performance in OS level. Like CPU load, Any process consuming high memory.

2. Clear cache using functional administrator

3. Check weblog page any stuck threads Causing issue

4. Check any trace files enabled/disabled. If trace enabled then disable it.

5. Check database alert log any issues happening on database side like Deadlock and blocking/locking session

6. Check inactive session details

Scenario-3

If It’s happening particular forms?

1.Check custom forms or seeded forms if custom forms we need to check any customization causing the issues.

2. Need to check form personalization causing issue/not

3.Check long running SQL's

4.Need to enable trace file in particular form

Go to the particular form and enable the trace

Help -> Diagnostics ->Trace -> Trace with Bind and waits

Trace file will generate under udump directory

$cd $ORACLE_HOME/admin/<$CONTEXT_NAME>/udump

Reference:

Troubleshooting Forms Performance Issues (Doc ID 819895.1)

Troubleshooting Web Deployed Oracle Forms Performance Issues (Doc ID 363285.1)

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