Did you try hanganalyze... Rajendra Pande Corporate Center IT Infrastructure (ITI) Distributed System Services (DSS) Database Services Tel: +1-201-352 1415 Internal: 19 422 1415 Fax +1-201-352 68 61 email rajendra.pande@xxxxxxx <mailto:rajendra.pande@xxxxxxx> _____ From: oracle-l-bounce@xxxxxxxxxxxxx [mailto:oracle-l-bounce@xxxxxxxxxxxxx] On Behalf Of Allen, Brandon Sent: Monday, January 22, 2007 2:57 PM To: rgoulet@xxxxxxxxxx; oracle-l@xxxxxxxxxxxxx Subject: RE: Oracle 817 freezing Is there a large transaction rolling back? Try this query: select s.username, s.sid, t.addr, t.status, t.used_ublk, decode(bitand(t.flag,128),0,'NO','YES') rolling_back from v$session s, v$transaction t where s.taddr=t.addr; _____ From: oracle-l-bounce@xxxxxxxxxxxxx [mailto:oracle-l-bounce@xxxxxxxxxxxxx] On Behalf Of Richard J. Goulet 3: Database will not shutdown immediate even after half an hour of waiting. Must use shutdown abort. 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. Please do not transmit orders or instructions regarding a UBS account by e-mail. The information provided in this e-mail or any attachments is not an official transaction confirmation or account statement. For your protection, do not include account numbers, Social Security numbers, credit card numbers, passwords or other non-public information in your e-mail. Because the information contained in this message may be privileged, confidential, proprietary or otherwise protected from disclosure, please notify us immediately by replying to this message and deleting it from your computer if you have received this communication in error. Thank you. UBS Financial Services Inc. UBS International Inc.