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  1. Core Server
  2. SERVER-36820

Wired Tiger Compression

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    Details

    • Type: Bug
    • Status: Closed
    • Priority: Major - P3
    • Resolution: Duplicate
    • Affects Version/s: 4.0.1
    • Fix Version/s: None
    • Component/s: WiredTiger
    • Environment:
      Amazon Linux
    • Operating System:
      ALL
    • Case:

      Description

      Hi,

      We recently upgraded out MongoDB from community version 3.4.14 to 4.0.1

      We see that the compression ratio differs for the same type of data between the version

      Hence we did a test and found that compression ratio drastically fell for 3.6+ 

      Version Raw size Storage size Comp Ratio
      4.0 10378066324 1594658816 6.5x
      3.6 10378066324 1599205376 6.49x
      3.4 10378066324 634499072 16.35x

      Can you please suggest if any changes has to be made in the configuration of MongoDB or WiredTiger?

      Below is the wired tiger configuration we are using

      wiredTiger:
      collectionConfig:
      blockCompressor: zlib
      engineConfig:
      directoryForIndexes: true
      journalCompressor: none
      cacheSizeGB: 40
      configString: "eviction_dirty_target=60, eviction_dirty_trigger=80, eviction=(threads_min=20,threads_max=20)"

      Thanks,

      Tanveer

       

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              Assignee:
              milkie Eric Milkie
              Reporter:
              tanveermadan Tanveer Madan Marate
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