Performance impact on oracle 11g database by audit enable

Hi All,
Shall we enable audit on some siebel db tables like s_party s_contacts s_order s_quote s_org_ext
We need to see who deleted account records from oracle tables manually
Since auditing is not enabled.
We have given delete privelege to to all users as required by Siebel application.
So Is this good idea to get Auditing enabled on these selected tables or Is there any performance impact on database.
Is it good idea to enable audit for these tables espacially in siebel
SQL> select * from v$version;
BANNER
Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - 64bit Production
PL/SQL Release 11.2.0.1.0 - Production
CORE 11.2.0.1.0 Production
TNS for HPUX: Version 11.2.0.1.0 - Production
NLSRTL Version 11.2.0.1.0 - Production

Hello,
Ok do it and generate AWR to see how the performance is getting impacted.remember auditing just some tables is not a big matter but auditing everything is the problem that is why fine grained auditing exist.please also remember to clean the audit records regularly because the auditing will be just a problem with the space in case you have many deletes which should not happen in your case.
Kind regards
Mohamed

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