Is it possible to prevent create tax book accounting entries to SLA in R12?

Our current business flow in tax book is not transfer accounting entries to GL. In Book Controls screen for tax book, check box 'Allow GL Posting' unchecked. Initially, we only 'Close Period' for tax book without run 'Create Accounting' program. When GL run Subledger Period Close Exceptions Report for Asset, all the tax book accounting entries shown in report with status 'Unprocessed'.
Then, we run 'Create Accounting' for tax book with no GL posting and run the Subledger Period Close Exceptions Report for asset again. All the 'unprocessed' tax book accounting entries no longer in the report. The status of tax book accounting entries showed 'Final' in SLA table. However, we are concerned about the volume of these tax book accounting entries will cause performance issue on SLA table in future.