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 afatkulin.blogspot.com
Alex Fatkulin's Blog: Hot backup mode and a little known fact
| | www.xt-r.com
XT&R blackboard: ? distinct values ?, ? TopN
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| | oracletoday.blogspot.com
Oracle Today: Performance of Autotrace
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| | I have been having some performance problems when using autotrace in some production systems. I finally had time to check out why. I enabled...
| | www.dbaglobe.com
Donghua's Blog - DBAGlobe: Subquery Performance Tuning (Part 2, NOT IN and NOT EXISTS))
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| | A blog about on new technologie. Hands-on note about Hadoop, Cloudera, Hortonworks, NoSQL, Cassandra, Neo4j, MongoDB, Oracle, SQL Server, Linux, etc.
| | dincosman.com
Direct Path Read Decision in Oracle: Beyond the Optimizer - Osman's DBlog
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| The performance issue with an SQL query was resolved by using the /*+ PARALLEL(2) */ hint, reducing execution time from 180-200 seconds to milliseconds. The decision to perform a direct read from disk to memory instead of reading blocks from disk was made by the database engine and is controlled by the hidden "_serial_direct_read" parameter....