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  1. Core Server
  2. SERVER-16868

Significant slowdown in capped collection performance when cap reached

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Details

    • Bug
    • Status: Closed
    • Major - P3
    • Resolution: Duplicate
    • 2.8.0-rc5
    • None
    • Storage
    • None
    • Fully Compatible
    • ALL
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      Same workload and setup as SERVER-16697. Test runs well and quickly fills collection on a C3-4xl EC2 machine, the number of client threads (100) may need to be reduced on less capable hardware.

      mongod --storageEngine=wiredTiger --wiredTigerCacheSizeGB 1
      		 

      $ git clone https://github.com/wiredtiger/mongo-tests.git
      		 
      $ cd mongo-tests/SERVER-16697/
      		 
      $ mongo --quiet 16697.js

      Show
      Same workload and setup as SERVER-16697 . Test runs well and quickly fills collection on a C3-4xl EC2 machine, the number of client threads (100) may need to be reduced on less capable hardware. mongod --storageEngine=wiredTiger --wiredTigerCacheSizeGB 1 $ git clone https://github.com/wiredtiger/mongo-tests.git $ cd mongo-tests/SERVER-16697/ $ mongo --quiet 16697.js

    Description

      When a smaller cache is used (1GB) and a high insert workload is applied to a capped collection, high insert latencies are seen once the collection reaches the capped value.

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          duplicates

          Bug - A problem which impairs or prevents the functions of the product. SERVER-16667 Isolated writes with extreme latencies in replica set under WiredTiger

          • Major - P3 - Major loss of function.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. SERVER-16919 Oplog can grow much larger than configured size under WiredTiger

          • Major - P3 - Major loss of function.
          • Closed
          is duplicated by

          Bug - A problem which impairs or prevents the functions of the product. SERVER-16919 Oplog can grow much larger than configured size under WiredTiger

          • Major - P3 - Major loss of function.
          • Closed
          is related to

          Bug - A problem which impairs or prevents the functions of the product. SERVER-16921 WT oplog bottleneck on secondary

          • Major - P3 - Major loss of function.
          • Closed

          Activity

            People

              mathias@mongodb.com Mathias Stearn
              darren.wood@10gen.com Darren Wood
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              Dates

                Created:
                Updated:
                Resolved: