NOTICE DATE:  November 10, 2008

NOTICE TYPE:  M-A111008-01  Performance Degradation and Outage - Wholesale

SHORT DESCRIPTION:  Intermittent access of MOS MUI links through TML on November 9, 2008

INTENDED AUDIENCE:  All Market Participants

DAY AFFECTED:  November 9, 2008

LONG DESCRIPTION:  A performance degradation and outage occurred on Texas Market Link (TML) servers which prevented some users from linking to the Market Operating System (MOS) Market User Interface (MUI) web pages from approximately 8:15 AM to 11:28 AM on November 9, 2008.  The MOS MUI links on TML included QSE Schedule and Bids, and Market information.

The performance degradation occurred during a temporary web server failover, where some users experienced intermittent errors when accessing the MOS market links.  Example error messages included "system not responding," "page cannot be displayed," and "page under construction."  The root cause is under investigation.  An outage on the TML servers also occurred from 10:57 AM to 11:10 AM due to network issues resulting from the planned maintenance window. 

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 e-mail at [log in to unmask].

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sg