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    • Tom Lane's avatar
      Replace the BufMgrLock with separate locks on the lookup hashtable and · 5d508736
      Tom Lane authored
      the freelist, plus per-buffer spinlocks that protect access to individual
      shared buffer headers.  This requires abandoning a global freelist (since
      the freelist is a global contention point), which shoots down ARC and 2Q
      as well as plain LRU management.  Adopt a clock sweep algorithm instead.
      Preliminary results show substantial improvement in multi-backend situations.
      5d508736
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  26. 05 Nov, 2004 1 commit
    • Tom Lane's avatar
      Create 'default_tablespace' GUC variable that supplies a TABLESPACE · 98e8b480
      Tom Lane authored
      clause implicitly whenever one is not given explicitly.  Remove concept
      of a schema having an associated tablespace, and simplify the rules for
      selecting a default tablespace for a table or index.  It's now just
      (a) explicit TABLESPACE clause; (b) default_tablespace if that's not an
      empty string; (c) database's default.  This will allow pg_dump to use
      SET commands instead of tablespace clauses to determine object locations
      (but I didn't actually make it do so).  All per recent discussions.
      98e8b480
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