 Under load, it is easily
      possible that truncation would never occur, resulting in table bloat.
      Fix by performing a partial truncation, releasing the lock, then
      attempting to re-acquire the lock and continue.  This fix also greatly
      reduces the average time before autovacuum releases the lock after a
      conflicting request arrives.
     </P
></LI
><LI
><P
>      Improve performance of <CODE
CLASS="FUNCTION"
>SPI_execute</CODE
> and related
      functions, thereby improving PL/pgSQ