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mwidlake.wordpress.com | ||
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kerryosborne.oracle-guy.com
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oracle-base.com
GROUP BY ALL in Oracle Database 23ai/26ai - ORACLE-BASE |
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blog.tanelpoder.com
Hello all fellow Oracle geeks and technology enthusiasts! Long time no see ;-) In the hacking session about Oracle full table scans and direct path reads I explained how the direct path read decision is not done by the optimizer, but instead during every execution, separately for every single segment (partition) scanned in the query. I also explained how the _small_table_thresholdparameter and theX$KCBOQH.NUM_BUF(which keeps track of how many buffers of any segment are currently cached) are used for determining whether to scan using direct path reads or not. - Linux, Oracle, SQL performance tuning and troubleshooting training & writing. |
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blog.yannickjaquier.com
SQL Plan Management feature overview through concrete example and its interactions with Adaptive Cursor Sharing (ACS) and SQL Profile |
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