NOTICE DATE:  May 11, 2011

NOTICE TYPE:  M-A051111-01 Outage – Retail/Wholesale

SHORT DESCRIPTION:  Database failure with impacted services    

INTENDED AUDIENCE:  ERCOT Market Participants

DAY AFFECTED:  May 10, 2011, 18:57 – 19:17 CDT

LONG DESCRIPTION:  ERCOT experienced a database failure from 18:57 until 19:17 CDT on May 10, 2011, that caused the SCED process to use aged data, which then impacted downstream reporting processes. As a result of this failure, several Current Day Reports (CDRs) pertaining to real-time system conditions were not posted to the Market Information System (MIS). Root cause of the failure has not yet been determined.  

This issue resulted in the following impacts:

·         Out of compliance issue impacting several of the real-time system conditions CDRs from the intervals of 18:00 – 21:00 CDT, based on the run time of the reports

·         ERCOT.com public displays and MIS Secure dashboards were not updated during the outage

·         Real-Time price corrections will be posted to the market for the associated SCED intervals impacted with aged data.

ADDITIONAL INFORMATION:  Please see the attached list for details of the impacted reports.  

CONTACT:  If you have any questions, please contact your ERCOT Account Manager. You may also call the general ERCOT Client Services phone number at (512) 248-3900 or contact ERCOT Client Services via email at [log in to unmask].

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dh