job_queue_processes parameter
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Thread: job_queue_processes parameter

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  1. #1
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    Question

    We are on 8.1.5

    The doc. says that this parameter is for:
    JOB_QUEUE_PROCESSES specifies the number of SNPn background processes per
    instance...

    So, if we have 8 jobs (that I can see in dba_jobs) and our job_queue_processes = 3; what does this mean ?

  2. #2
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    JOB_QUEUE_PROCESSES is OS process
    Jobs is scheduled jobs

  3. #3
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    so what is the relationship between the two, if any; is there a limit (parameter) to the number of oracle jobs that I can schedule?

  4. #4
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    relation is if you dont have snpX processes you cant run scheduled jobs because those processes are the one who checks for jobs

    Job queue processes process requests created by DBMS_JOB, and those requests are the scheduled JOBs

  5. #5
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    so is it good to have many job_queue_processes set or not?
    one of my database server set job_queue_processes=0 and the other server is set to 14...

  6. #6
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    I set it to 4 because I have like 12 jobs only and they run in different hours

  7. #7
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    Wink

    So what is a good job_queue_process number for lets say 15 jobs ? Is there a rule-of-thumb ?

    Lets say job_queue_process =1, and there are 50 jobs, will some of them be delayed since there is only one SNP background process...have you seen any doc. that addresses this topic.

  8. #8
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    Nop, I just use common sense, I schedule the jobs in different hours at most I have 2 jobs running concurrently so 4 is enough for my 12 jobs

  9. #9
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    Wink

    Thank you, I appreciate the quick responses.

  10. #10
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    I really have to understand better on init.ora files...any good sources or book that I can study..I have the Oracle Database Administration book from O'Reilly, but the explanation is too vague....any other good init.ora parameter file books or info

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