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  1. Core Server
  2. SERVER-69132

Additional metrics on chunk balancing performance

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    • Icon: Improvement Improvement
    • Resolution: Unresolved
    • Icon: Minor - P4 Minor - P4
    • None
    • None
    • Sharding
    • Catalog and Routing
    • 2

    Description

      While diagnosing balancing performance, sometime we have to look into the config.actionlogs for the balancing round information, or config.changelog/mongod logs for the time spent on each move Chunk step. It would be nice if we can also have some metrics around these in FTDC. For example:

      • On CSRS primary:
        • Balancing around currently running (something like "wt transaction transaction checkpoint currently running")
        • Number of candidate chunks found 
        • Number of chunks moved
        • Number of chunks aborted
        • Number of chunk migrations in progress.
        • These may help us to understand how long the time is spent on moving chunks, and the other steps like finding chunks to move.
      • On shard primary:
        • moveChunk currently running
        • step X currently running.
        • These may help us to understand the slowest step(s) for the chunk migration.

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            backlog-server-catalog-and-routing Backlog - Catalog and Routing
            linda.qin@mongodb.com Linda Qin
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              Updated: