Oracle 参数之_small_table_threshold

SQL> select * from v$version;

BANNER
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Oracle9i Enterprise Edition Release 9.2.0.6.0 - 64bit Production
PL/SQL Release 9.2.0.6.0 - Production
CORE    9.2.0.6.0       Production
TNS for IBM/AIX RISC System/6000: Version 9.2.0.6.0 - Production
NLSRTL Version 9.2.0.6.0 - Production
SQL> set linesize 120
SQL> col name for a30 trunc
SQL> col value for a20
SQL> col pdesc for a50 trunc
SQL> SELECT x.ksppinm NAME, y.ksppstvl VALUE, x.KSPPDESC PDESC
  2    FROM SYS.x$ksppi x, SYS.x$ksppcv y
  3  WHERE x.indx = y.indx AND x.ksppinm LIKE '%&par%';
Enter value for par: small
old   3: WHERE x.indx = y.indx AND x.ksppinm LIKE '%&par%'
new   3: WHERE x.indx = y.indx AND x.ksppinm LIKE '%small%'

NAME                           VALUE                PDESC
------------------------------ -------------------- --------------------------------------------------
_small_table_threshold         3731                 threshold level of table size for direct reads