Turning Oracle Database

Posted on 2006-06-05
Last Modified: 2012-06-27

My company is using IBM Server ( 8G RAM, 2 CPU = 3G x 2 ) , OS: Red Hat Enterprise Linux AS release 3 (Taroon Update 3).

Oracle 9i is running on it.

Now i want to configure Oracle ( or OS ) to use effect my resource ( load balancing o 2 CPU, change SGA ,... ).

What should we do now ?


Question by:freshrain
    LVL 16

    Expert Comment

    The resources to be optimized are CPU, DISK IO and System Memory.
    For CPU optimization enable Parallel processing. Set the initialization parameters for parallel operations.
    If there are multiple disks then distribute IO for different tablespaces for data and index.
    Allocate optimum system memory for Buffer cache, shared pool log buffer, sort area etc.

    Author Comment


    With mentioned resource, Can you give me a sample configuration ( initialization parameters file, disk io,.. ) as you mentioned ?

    LVL 16

    Accepted Solution

    For achieving the best performance from Oracle database the following has to be considered

    1) Hardware and operating system performance
    2) Oracle instance performance
    3) Individual transaction (SQL) performance

    Allocate sufficient memory for "BUFFER CACHE", shared pool etc. Make sure that total SGA size is not too big for physical memory, since swapping of the SGA will severely degrade Oracle performance. The following initialization parameters in oracle influence the amount of memory utilized


    To enable parallel CPU utilization set the value for PARALLEL_MAX_SERVERS > 0

    Set the value for DBWR_IO_SLAVES > 1


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