Uploaded image for project: 'WiredTiger'
  1. WiredTiger
  2. WT-6203

Consider increasing default cache_overhead setting

    • Type: Icon: Improvement Improvement
    • Resolution: Gone away
    • Priority: Icon: Major - P3 Major - P3
    • None
    • Affects Version/s: None
    • Component/s: None
    • None
    • 5

      With the changes in Durable History we have noticed that the MongoDB memory allocation overhead in tcmalloc is higher by up to 20%. The wiredtiger_open API call has a cache_overhead configuration setting that aims to account for that overhead.

       

      We should consider increasing the default value for the cache_overhead setting from 8 to something higher (I'd suggest trying 15) in order to avoid operational issues for users who might run into out of memory (OOM) issues in their production environments due to increased fragmentation.

            Assignee:
            backlog-server-storage-engines [DO NOT USE] Backlog - Storage Engines Team
            Reporter:
            alexander.gorrod@mongodb.com Alexander Gorrod
            Votes:
            0 Vote for this issue
            Watchers:
            7 Start watching this issue

              Created:
              Updated:
              Resolved: