How Often to Restart an ECC 6.0 Instance?

Hi,
I have notice that after a few weeks the buffers start swapping a lot in ST02 in our production instance application servers. The only way I know to fix this is to restart the instance. 1. Is there a way to clear/defragment the buffers without restarting? 2. How often should the instances be restarted? Our plants run 24x7 so downtime is hard to come by.
Our buffer parameters are set according to SAP Earlywatch recommendations.
Thank you,
Shelby

Hi,
/$sync it will reset the buffer as well as number ranges too. so i recomend /$TAB instead of /$Sync.
/$TAB will just reset the buffer without restarting the system.
For more information click [Buffers|http://help.sap.com/erp2005_ehp_04/helpdata/EN/c4/3a6e98505211d189550000e829fbbd/frameset.htm]
With Regards,
Krishna.

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