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Re: Informix job scheduler issues

Posted By: MARK COLLINS
Date: Friday, 27 January 2012, at 10:34 a.m.

In Response To: Re: Informix job scheduler issues (John Miller iii)

John,
Thanks for the info. I will try that next, but I hope that someone might be able to explain some strange behavior that seems to happen near midnight.
I have the job defined in ph_task with tk_start_time = 13:15:00, and tk_frequency = 0 01:00:00. The first time on Wednesday, it didn't start at 13:15:00, so I manually set tk_next_execution to 'current + 5 units minute', which ended up 15:38:00. From that point on, it ran correctly at 38 past the hour, every hour from 15:38:00 through 23:38:00, taking a little over four minutes each time. Then things get weird. Selecting run_id, run_task_seq, and run_time from ph_run, I get:
run_id run_task_seq run_time
81369 3 2012-01-25 15:42:19
81378 4 2012-01-25 16:42:33
81388 5 2012-01-25 17:42:31
81396 6 2012-01-25 18:43:26
81406 7 2012-01-25 19:42:30
81411 8 2012-01-25 20:42:29
81417 9 2012-01-25 21:42:28
81422 10 2012-01-25 22:42:31
81431 11 2012-01-25 23:42:31
81670 12 2012-01-25 23:48:32
82479 13 2012-01-25 23:59:26
82518 14 2012-01-26 00:04:11
So run_seq 3 through 11 are correct. Then, just a couple of minutes after #11 finishes, #12 starts at 23:44:00, followed by #13 at 23:55:00, and #14 at 00:00:00.
As I mentioned in the previous email, the job then stops, but starts up at the desired tk_start_time of 13:15:00. Runs identified by task_seq 15 through 25 show "correct" runs, but then things go weird, with 9 extra runs:
run_id run_task_seq run_time
82589 15 2012-01-26 13:19:02
82599 16 2012-01-26 14:19:01
82608 17 2012-01-26 15:19:01
82626 18 2012-01-26 16:19:01
82635 19 2012-01-26 17:19:02
82644 20 2012-01-26 18:19:00
82650 21 2012-01-26 19:18:56
82659 22 2012-01-26 20:18:55
82664 23 2012-01-26 21:18:58
82671 24 2012-01-26 22:18:58
82676 25 2012-01-26 23:18:58
82677 26 2012-01-26 23:22:38
82678 27 2012-01-26 23:26:23
82684 28 2012-01-26 23:30:05
82685 29 2012-01-26 23:33:48
82686 30 2012-01-26 23:37:31
82687 31 2012-01-26 23:41:17
82688 32 2012-01-26 23:45:00
83406 33 2012-01-26 23:55:15
83725 34 2012-01-27 00:02:50
Any thoughts about why these "extra" runs are occurring as the time gets close to midnight?
>> If you would like it to run every hour, then set the stop and
>> start time both to NULL and the tk_frequency to 1 hour. There are
>> several built in tasks with both the start and stop times set to
>> NULL (see mon_profile as an example)

Messages In This Thread

Informix job scheduler issues
MARK COLLINS -- Tuesday, 24 January 2012, at 1:25 p.m.
- Re: Informix job scheduler issues
  Fernando Nunes -- Tuesday, 24 January 2012, at 1:44 p.m.
  - Re: Informix job scheduler issues
    MARK COLLINS -- Tuesday, 24 January 2012, at 3:26 p.m.
    - RE: Informix job scheduler issues
      Bruce Simms -- Tuesday, 24 January 2012, at 3:32 p.m.
      - RE: Informix job scheduler issues
        John Miller iii -- Tuesday, 24 January 2012, at 3:58 p.m.
    - Re: Informix job scheduler issues
      Fernando Nunes -- Tuesday, 24 January 2012, at 5:35 p.m.
    - Re: Informix job scheduler issues
      John Miller iii -- Tuesday, 24 January 2012, at 7:21 p.m.
      - Re: Informix job scheduler issues
        MARK COLLINS -- Thursday, 26 January 2012, at 11:18 a.m.
        
        Re: Informix job scheduler issues
        John Miller iii -- Thursday, 26 January 2012, at 11:35 a.m.
        
        Re: Informix job scheduler issues
        MARK COLLINS -- Friday, 27 January 2012, at 10:34 a.m.
        
        Re: Informix job scheduler issues
        Art Kagel -- Friday, 27 January 2012, at 10:44 a.m.
        
        Re: Informix job scheduler issues
        MARK COLLINS -- Friday, 27 January 2012, at 2:32 p.m.
        
        Re: Informix job scheduler issues
        MARK COLLINS -- Monday, 30 January 2012, at 5:25 p.m.
        
        Re: Informix job scheduler issues
        Art Kagel -- Monday, 30 January 2012, at 5:39 p.m.
        
        Re: Informix job scheduler issues
        MARK COLLINS -- Monday, 30 January 2012, at 6:35 p.m.
        
        (repost)Re: Informix job scheduler issues
        MARK COLLINS -- Wednesday, 1 February 2012, at 4:51 p.m.

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