i have Cache hit ratio 27%, what can i do?
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Thread: i have Cache hit ratio 27%, what can i do?

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  1. #1
    Join Date
    Jan 2001
    Posts
    32

    Unhappy

    we have a database with the Cache hit ratio 27%,

    what can i do?

    RDBMS version 7.3.4.0.1
    Platform : Sun Solaris 2.6

  2. #2
    Join Date
    Jun 2000
    Posts
    295
    What kind of cache, data cache, library cache, or dictionary
    cache?

  3. #3
    Join Date
    Apr 2000
    Location
    Edison, NJ
    Posts
    759
    If it's Buffer cache hit ratio, then increase the size of the buffer cache.

  4. #4
    Join Date
    Nov 2000
    Location
    greenwich.ct.us
    Posts
    9,092
    data/buffer cache - increase db_block_buffers
    library cache or dictionary cache - increase shared_pool
    Jeff Hunter
    marist89@yahoo.com
    http://marist89.blogspot.com/
    Get Firefox!
    "I pledge to stop eating sharks fin soup and will not do so under any circumstances."

  5. #5
    Join Date
    Jan 2001
    Posts
    32

    Unhappy

    the buffer cache hit ratio is 27%, i increase de db_block_buffers but the cache hit ratio down, i check parameters of init and db_block_lru_latches = 1, do you thing that i increase lru latches help to performance


  6. #6
    Join Date
    Jun 2000
    Location
    Madrid, Spain
    Posts
    7,447
    did you bounce the database after you modified the parameter? You have to

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