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Archives of the TeradataForum
Message Posted: Thu, 20 Jun 2013 @ 22:15:24 GMT
Subj: | | Re: High AMP I/O Skew Always |
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From: | | Sirupa Ashok |
Hi Dave Clark,
I ran the following query from your scripts this showing me high 'Virtual Disk Use Skew %' and this number exactly equal to the 'High AMP I/O
Skew' on the view point.
Could you suggest what could be the reason how to avoid this skew.
SEL CAST((HiDiskAmpProc/32)*100 AS INTEGER) + (HiDISKAmpProc MOD 32)
(TITLE 'High Disk//Node', FORMAT 'ZZ9-99'),
HiDiskAmpNo (TITLE 'High Disk//Use Amp', FORMAT 'ZZZZZ9'),
HiDiskAmp (TITLE 'High Disk Use %', FORMAT 'ZZZ,ZZZ,ZZ9.99'),
AmpAvgDisk (TITLE 'Average Disk Use %', FORMAT 'ZZZ,ZZZ,ZZ9.99'),
(100 * (1 - (AmpAvgDisk / NULLIFZERO(HiDiskAmp))))
(TITLE 'Virtual Disk//Use Skew %',FORMAT 'ZZ9') FROM TABLE
(SYSLIB.MonitorVirtualSummary()) AS t1 WHERE HiDiskAmp > 0;
Appreciate your Help.
Thank you.
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