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Validate Structure

Basic Index Compression Made Simple (It Ain’t Easy)

I’ve discussed Index Compression a number of times as it’s an excellent way of minimizing the size of indexes without unnecessary, expensive index rebuilds. One of the nice features of Advanced Index Compression is that not only does it potentially compress indexes more effectively than possible with Basic Index Compression, but that it also eliminates […]

BLKS_GETS_PER_ACCESS Index Rebuild Criteria ? (Twisted Logic)

A recent question on the database OTN forum and a previous request by Charles Hooper that I cover some basic indexing concepts for newbie’s who might be confused by “dubious” information out there in internet land has prompted me to discuss the BLKS_GETS_PER_ACCESS metric, available in INDEX_STATS after an analyze validate structure operation.   The OTN [...]

Oracle11g: Analyze Table Validate Structure Cascade “FAST” (Slow Burn)

I always take notice when Oracle introduces a new “FAST” option, so it was with some excitement when I first noticed in Oracle 11g Rel 1 there was a new FAST option when running the ANALYZE TABLE CASCADE VALIDATE STRUCTURE command.   This was described in the manuals as introducing a hashing scheme that was significantly [...]