Thanks again Mladen, but we do have it set already: SQL> show parameter filesystem NAME TYPE VALUE ------------------------------------ ----------- ------ filesystemio_options string setall Also, my understanding is that any pages cached by the AIX filesystem buffer for a JFS2 filesystem will be categorized as "client" pages and svmon reports that all our pinned pages are classified as "working", not persistent or client: work pers clnt pin *1889668* 0 0 in use 2872322 0 1211786 Regards, Brandon Privileged/Confidential Information may be contained in this message or attachments hereto. Please advise immediately if you or your employer do not consent to Internet email for messages of this kind. Opinions, conclusions and other information in this message that do not relate to the official business of this company shall be understood as neither given nor endorsed by it. -- //www.freelists.org/webpage/oracle-l