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Performance Tuning By ExamplePPT资源下载

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  • Performance Tuning By Example简介
  • Performance Tuning By Example

    How to use oracle 
    Know The database
    How Oracle Store the data
    How Oracle Access the data
    How Oracle manage concurrency
    How Oracle Do Select/DML
    Know the application
    How application use the data
    Store/Manage the data as it is used
    How oracle store the data
    Data is stored in tables
    Heap table (Most commonly used)
    Partitioned table
    Index organized table
    Cluster
    Hash Cluster
    Index
    Materialized View
    External Tables
    How oracle access the data
    Single Table Access Path
    Full Table Scan
    ROWID unique scan
    Index unique scan
    Index range scan
    Index (fast) full scan
    Bitmap Index
    Index and-equal
    Table Join
    Hash Join
    Nested loop join
    Sort-merge join


    How oracle manage concurrency
    Row Level Lock
    SCN(System Change Number) and rollback segment
    Readers don’t block writers
    Writers don’t block readers
    Writers don’t block writers (not the same row) --Row Level Lock
    Support tens of thousands of users

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