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  1. WiredTiger
  2. WT-3898

Keep prepared updates in lookaside until they are read

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    Details

    • Type: Bug
    • Status: Closed
    • Priority: Major - P3
    • Resolution: Fixed
    • Affects Version/s: None
    • Fix Version/s: 4.0.4, 4.1.5, WT3.2.0
    • Component/s: None
    • Labels:
      None
    • Sprint:
      Storage Engines 2018-10-22, Storage Engines 2018-11-05

      Description

      This ticket has been repurposed, to track a class of issues related to managing cache overflow (lookaside) and prepared updates. The prepared failures are described in comments below as well as in WT-4362 and WT-4364.

      There is another smaller fix for the originally reported symptom regards unexpected page states in WT-4374.
      LIMBO failure in format on the current develop branch:

      t, file:wt.wt, WT_CURSOR.update: __wt_row_modify, 65: cbt->ref->state != WT_REF_LIMBO
      

      I am unable to reproduce. Here's the CONFIG:

      ############################################
      #  RUN PARAMETERS
      ############################################
      abort=0
      alter=0
      auto_throttle=1
      backups=1
      bitcnt=4
      bloom=1
      bloom_bit_count=46
      bloom_hash_count=15
      bloom_oldest=0
      cache=31
      cache_minimum=20
      checkpoints=on
      checkpoint_log_size=135
      checkpoint_wait=30
      checksum=uncompressed
      chunk_size=10
      compaction=0
      compression=snappy
      data_extend=0
      data_source=table
      delete_pct=11
      dictionary=0
      direct_io=0
      encryption=rotn-7
      evict_max=4
      file_type=row-store
      firstfit=0
      huffman_key=0
      huffman_value=0
      independent_thread_rng=1
      in_memory=0
      insert_pct=15
      internal_key_truncation=1
      internal_page_max=11
      isolation=read-committed
      key_gap=6
      key_max=30
      key_min=14
      leaf_page_max=16
      leak_memory=0
      logging=0
      logging_archive=1
      logging_compression=none
      logging_file_max=41093
      logging_prealloc=0
      long_running_txn=0
      lsm_worker_threads=4
      merge_max=9
      mmap=1
      modify_pct=0
      ops=100000
      prefix_compression=1
      prefix_compression_min=6
      quiet=1
      read_pct=22
      rebalance=1
      repeat_data_pct=13
      reverse=0
      rows=100000
      runs=1
      salvage=1
      split_pct=56
      statistics=0
      statistics_server=0
      threads=31
      timer=360
      transaction_timestamps=1
      transaction-frequency=4
      value_max=3986
      value_min=3
      verify=1
      wiredtiger_config=
      write_pct=52
      ############################################
      

      cc: Sue Loverso

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              Assignee:
              vamsi.krishna Vamsi Boyapati
              Reporter:
              keith.bostic Keith Bostic
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                Dates

                Created:
                Updated:
                Resolved: