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  1. Core Server
  2. SERVER-19334

TTL index deletions cannot always keep up with insertions with WiredTiger

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    Details

    • Type: Bug
    • Status: Closed
    • Priority: Major - P3
    • Resolution: Incomplete
    • Affects Version/s: None
    • Fix Version/s: None
    • Component/s: Performance, Storage, WiredTiger
    • Labels:
    • Operating System:
      ALL
    • Sprint:
      Integration F (02/01/16), Integration 10 (02/22/16)

      Description

      Configuration:

      db version v3.1.6-pre-
      git version: 21c4ce42c34008a966e66214b1dd83cdc066bf1c

      Environment

      • Windows
      • SA or Replica set
      • Storage engine WT
      • TTL configured to 20 sec

      Workload:

      • Hammer.mongo insert only profile w/ TTL = 20 sec (configurable variable in simple_insert.sh) i'm using it to simulate cache workload

      Issues:

      MongoDb reported that document has been deleted w/
      db.serverStatus().metrics.ttl
      But all document remains and DB size is growing like insert only no TTL , and you can see them using db.c.find()

      TTL working well on the same workload , same build w/ MMAP storage engine

      Additional information

      Please see SERVER-19688 as well.

        Attachments

        1. serverstatus.txt
          13 kB
        2. FindOne and Index.txt
          2 kB

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              People

              Assignee:
              backlog-server-execution Backlog - Storage Execution Team
              Reporter:
              eitan.klein Eitan Klein
              Participants:
              Votes:
              1 Vote for this issue
              Watchers:
              26 Start watching this issue

                Dates

                Created:
                Updated:
                Resolved: