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  1. Core Server
  2. SERVER-58433

ReshardingCoordinatorService Transaction In bumpCollectionVersionAndChangeMetadataInTxn Possibly Too Large

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Details

    • Fully Compatible
    • v5.0
    • Sharding 2021-08-23
    • 2

    Description

      As discovered in this ticket and discussed in this [CR|https://mongodbcr.appspot.com/799100006.] The transaction in ShardingCatalogManager that makes sure the updates in 
      bumpCollectionVersionAndChangeMetadataInTxn happen atomically requires at least 5 GB of Wired Tiger cache size.
       
      This is too large for an Atlas M30 to be able to handle as it has 8 GB of RAM and 50% of it is used for WT cache.
       
      We need to investigate whether this is an issue and how to fix it.

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          related to

          Bug - A problem which impairs or prevents the functions of the product. SERVER-73763 Resharding does not extend zone ranges for config.tag docs, leading to config server primary fassert loop from duplicate key error

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

          Bug - A problem which impairs or prevents the functions of the product. SERVER-73848 Hashed shard keys with zones can cause issues with resharding

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

          Bug - A problem which impairs or prevents the functions of the product. SERVER-68495 Resharding a collection with a very large number of zones configured may stall on config server primary indefinitely

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

          Task - A task that needs to be done. SERVER-61035 Increase zones in 'resharding_large_number_of_initial_chunks.js' to 175,000

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

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              luis.osta@mongodb.com Luis Osta (Inactive)
              luis.osta@mongodb.com Luis Osta (Inactive)
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