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dioncho.wordpress.com | ||
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jonathanlewis.wordpress.com
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| | | | | I've lost count of the number of times I've reminded people that hinting (correctly) is hard. Even the humble /*+ index() */ hint and its close relatives are open to misunderstanding and accidental misuse, leading to complaints that "Oracle is ignoring my hint". Strange though it may seem, I'm still not 100% certain of what... | |
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orastory.wordpress.com
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| | | | | There have been some interesting posts from Marcin Przepiorowski and Kerry Osborne about mapping sql plan management (spm) baselines to a corresponding sql id. The key to sql plan baselines (DBA_SQL_PLAN_BASELINES) is SIGNATURE. And why signature? It's not just another change to the key to identifying sql statements (HASH_VALUE -> (NEW_)HASH_VALUE / OLD_HASH_VALUE -> SQL_ID).... | |
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kerryosborne.oracle-guy.com
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www.bobbydurrettdba.com
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| | | Sunday night we worked with Oracle Support on a performance issue with a query that had been running for over 14 hours even though it ran the previous weekend in five minutes. Oracle Support showe... | ||
