August 2015
Intermediate to advanced
672 pages
23h 1m
English
book
Expert Oracle Exadata, Second Edition
by Martin Bach, Karl Arao, Andy Colvin, Frits Hoogland, Randy Johnson, Kerry Osborne, Tanel Poder
Content preview from Expert Oracle Exadata, Second Edition
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Do not worry about the other statistics shown here—they are part of this chapter as well. Note that cell physical IO bytes eligible for predicate offload simply counts the physical size of the segment in the data blocks in data files and not the “eventual” data size after any decompression, filtering, or projection.
If this number does not increase for your session’s V$SESSTAT (or Statspack/AWR data when looking at the whole instance), then this is another indicator that Smart Scans are not used. Any block ranges scanned through, or even skipped (thanks to storage index optimizations), by a Smart Scan session should increment this statistic. Another fact worth knowing is that when a Smart Scan falls back to passthrough (full-block shipping) ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.