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Microsoft Dynamics 365 | Integration, Dataverse...
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Do failed system jobs running slow down the system? How to tell if failed jobs are being re-run

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In this case I am specifically wondering about system jobs that run on the ms dynamics journeys app triggers.  We have several triggers that every time they are triggered the job fails.  We had a ton of failures today and our system slowed to a crawl.  I need to understand how failed jobs can potentially impact system performance.  We had 166 out of 1452 jobs fail today which doesn't seem like a higher percentage, unless those failed jobs are running over and over again for a period of time then entering failed status.
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    PerezAguiar Profile Picture
    Microsoft Employee on at
    Do failed system jobs running slow down the system? How to tell if failed jobs are being re-run
    Hello!
     
    This is a very complicated question.  There's no direct relationship proven.  Usually, this will depend on the status of the job after execution.   Normally, failed jobs will remain in the list consuming storage.  As a safe practice, you should review failed jobs periodically and then, after solving any issue that might have caused them, remove them. 
     
    However, if we leave the number of records on certain tables to grow (ActivityPointer, etc), besides the extra storage, it means that everytime system requires something from this table, it will have more and more records to query. It's not the same to run a query over 200K records than doing it on 2 million.  Specially, because the larger the number of records the larger the indexes required.  And because there's a view of "failed system jobs", this will consume more storage and queries will be slightly slower.
     
    However, there are certain jobs that instead of being moved to "failed" remain as "waiting". And these are the dangerous ones, because it means they might be reprocessed.
     
    Regards,
     
    ******
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