Problem Statement: Problem Statement



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tarix26.12.2016
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#3373
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Three goals:

  • Use a new memory format method of allocating pool memory:
    • Specifying buffer pool size in bytes (Kb, Mb, Gb) units.
  • Marking the pool as extendable.
  • Maintain the legacy format method of BUFFERPOOL for current user compatibility:
    • Specifying buffer pool size and its limits in pagesize units.
  • Some BUFFERPOOL arguments are now incompatible with others.

  • Must follow rules to properly set this parameter:

    • Order of precedence for all BUFFERPOOL definitions:
      • All definitions shall have the same format (all legacy or all memory) or the server will not boot.
      • If an argument’s value is not defined, we use the value from the default BUFFERPOOL setting.
      • If the default BUFFERPOOL setting is not defined, use the internal definition for the format being used. If unable to determine format (ex. BUFFERPOOL size=2k), use internal format based on any other BUFFERPOOL definitions present. If not, use internal legacy.



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