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  1. WiredTiger
  2. WT-1869

cache: maximum page size at eviction exceeds memory_page_max by a large factor

    Details

    • Type: Task
    • Status: Closed
    • Priority: Major - P3
    • Resolution: Fixed
    • Affects Version/s: None
    • Fix Version/s: WT2.7.0
    • Labels:
      None

      Description

      Running wtperf with the following configuration will generate maximum page sizes that are aprx 7x larger than the given memory_page_max size.

      conn_config="cache_size=100MB,statistics=(all),statistics_log=(wait=10)"
      database_count=1
      table_config="leaf_page_max=4k,internal_page_max=16k,leaf_item_max=1433,internal_item_max=3100,type=file,memory_page_max=10m,split_pct=90,leaf_value_max=1MB"
      icount=50000000
      populate_threads=10
      random_range=10000000
      report_interval=5
      run_time=0
      threads=((count=1,reads=1),(count=1,inserts=1))
      value_sz=100
      warmup=10

      This run takes 30~ seconds to form the first very large page when running on my OSX Macbook Pro

      Relates to MongoDB ticket SERVER-16902

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              • Assignee:
                david.hows David Hows (Inactive)
                Reporter:
                david.hows David Hows (Inactive)
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                • Created:
                  Updated:
                  Resolved: