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  1. Core Server
  2. SERVER-19911

Set wiredTigerConcurrentReadTransactions based on machine specs?

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    Details

    • Type: Improvement
    • Status: Closed
    • Priority: Major - P3
    • Resolution: Gone away
    • Affects Version/s: None
    • Fix Version/s: None
    • Component/s: WiredTiger
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      Description

      I see that there's a setting for wiredTigerConcurrentReadTransactions. We appear to be sometimes hitting this. I'm not really sure why this exists, but it appears to potentially be artificially capping throughput? If you have a really beefy machine, then you should be able to handle more concurrent read transactions? Is there any reason we shouldn't raise it? Does it increase contention to a point where things slow down more than they are sped up?

      I see a brief reference to being able to change it in the docs (http://docs.mongodb.org/manual/reference/parameters/), but it's not clear to me if I should or what the implications are.

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            Assignee:
            michael.cahill Michael Cahill
            Reporter:
            chengas123 Ben McCann
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