[GitHub] [couchdb] nickva opened a new pull request #2922: Improve efficiency of couch_jobs:accept/2 for views

[GitBox <gi...@apache.org>]

nickva opened a new pull request #2922:
URL: https://github.com/apache/couchdb/pull/2922


   Use couch_jobs's `no_schedule` accept option to speed up job dequeuing.
   
   This optimization allows dequeung jobs more efficiently if these conditions are
   met:
   
    1) Job IDs start with a random prefix
    2) No time-based scheduling is used
   
   Both of those can be true for views job ids can be generated such that
   signature comes before the db name part, which is what this commit does.
   
   The way the optimisation works, is random IDs are generating in pending jobs
   range, then, a key selection is used to pick either a job before or after
   it. That reduces each dequeue attempt to just 1 read instead of reading up to
   1000 jobs.
   


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[GitHub] [couchdb] nickva merged pull request #2922: Improve efficiency of couch_jobs:accept/2 for views

[GitBox <gi...@apache.org>]

nickva merged pull request #2922:
URL: https://github.com/apache/couchdb/pull/2922


   


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