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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

    • Bug
    • Status: Closed
    • Major - P3
    • Resolution: Incomplete
    • None
    • None
    • Performance, Storage, WiredTiger
    • Storage Execution
    • ALL
    • 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. FindOne and Index.txt
          2 kB
        2. serverstatus.txt
          13 kB

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              backlog-server-execution Backlog - Storage Execution Team
              eitan.klein Eitan Klein
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              Dates

                Created:
                Updated:
                Resolved: