Your post shows one wait, why is one wait a concern? More importantly what was the application doing? Was it doing DDL? Production tasks generally should not perform DDL operations and if you got a row wait on sys.icol$ then DDL was being performed. -- Mark D Powell -- Phone (313) 592-5148 ________________________________ From: oracle-l-bounce@xxxxxxxxxxxxx [mailto:oracle-l-bounce@xxxxxxxxxxxxx] On Behalf Of VIVEK_SHARMA Sent: Tuesday, February 03, 2009 3:39 AM To: ORACLE-L Subject: Row Lock Waits on SYSTEM.ICOL$ Folks During an OLTP Benchmark Run of a CRM Banking Application following Row Lock Waits are experienced on SYSTEM.ICOL$ Oracle 10.2.0.4.0 HP-UX B.11.11 Any pointers please? ... Will Share AWR as needed. Cheers & Thanks V much Segments by Row Lock Waits Owner Tablespace Name Object Name Subobject Name Obj. Type Row Lock Waits % of Capture SYS SYSTEM ICOL$ TABLE 1 100.00 **************** CAUTION - Disclaimer ***************** This e-mail contains PRIVILEGED AND CONFIDENTIAL INFORMATION intended solely for the use of the addressee(s). If you are not the intended recipient, please notify the sender by e-mail and delete the original message. Further, you are not to copy, disclose, or distribute this e-mail or its contents to any other person and any such actions are unlawful. This e-mail may contain viruses. Infosys has taken every reasonable precaution to minimize this risk, but is not liable for any damage you may sustain as a result of any virus in this e-mail. You should carry out your own virus checks before opening the e-mail or attachment. Infosys reserves the right to monitor and review the content of all messages sent to or from this e-mail address. Messages sent to or from this e-mail address may be stored on the Infosys e-mail system. ***INFOSYS******** End of Disclaimer ********INFOSYS***