Size of the backup is increasing rapidly

Dear All,

EBS version is 12.1.3.

Recently, I found the size of application & database is increasing rapidly.

For the application tier, the huge size happens on "/opt/oracle/PROD/inst/apps/PROD_prodapps/ora/10.1.2/forms" 22GB, and there are lots of core files generated.

e.g. core.123456,    core.234567....

Then I execute below actions:

1). Edit context parameter value "s_forms_catchterm"
FROM
<FORMS_CATCHTERM oa_var="s_forms_catchterm">1</FORMS_CATCHTERM>
TO
<FORMS_CATCHTERM oa_var="s_forms_catchterm">0</FORMS_CATCHTERM>

2). Run Autoconfig to make change effective

BUT, the issue still exists, core files are still generating.

So, my questions are:

1. Is there any other solutions for application tier to avoid core files generating?