NO is the default value of COMPRESS_DIRLOB. This parameter is online changeable. DEFAULT_INSERT_ALGORITHM is introduced for the new Insert Algorithm 2 feature of Db2  12. It specifies the default algorithm for inserting data into table spaces, which affects the  insert algorithm for MEMBER CLUSTER universal table spaces for which INSERT  ALGORITHM 0 was specified. This system parameter takes effect only when the activated  function level is function level 500 or higher. The following values for DEFAULT_INSERT_ALGORITHM are acceptable: The 2 value is the default value for DEFAULT_INSERT_ALGORITHM. This parameter is  online changeable. For more information about the new insert algorithm, see 2.3, “Insert Algorithm 2” on  page 50.  INDEX_MEMORY_CONTROL specifies the amount of memory that Db2 can be allocated for  fast traversal of Db2 indexes. It is introduced in Db2 12 in support of new fast index traversal  feature.  The following values for INDEX_MEMORY_CONTROL are acceptable: The default value for INDEX_MEMORY_CONTROL is AUTO. This parameter is online  changeable. For more information about the fast index traversal feature, see 2.1, “Fast index traversal” on  page 24. The RLFENABLE subsystem parameter specifies whether the resource limit facility limits  resources that are used by dynamic SQL statements only, static SQL statement only, or all  SQL statements. The following values for INDEX_MEMORY_CONTROL are acceptable: The default value for RLFENABLE is DYNAMIC. GLYPH<SM590000> DYNAMIC: Resource limits apply to dynamic SQL statements only. GLYPH<SM590000> STATIC: Resource limits apply to static SQL statements only. GLYPH<SM590000> ALL: Indicates that resource limits apply to dynamic and static SQL statements. 336  IBM Db2 12 for z/OS Performance Topics RLFENABLE GLYPH<SM590000> 10 - 200000: Indicates the storage limit in MBs for fast index traversal. GLYPH<SM590000> DISABLE: Db2 returns any storage that is allocated for fast index traversal and allocates  no other storage for this purpose. This process results in the fast index traversal effectively  being disabled. GLYPH<SM590000> AUTO: Db2 sets the upper limit of the storage that is used for the FTBs to 20% of the  currently allocated buffer pools or 10 MB, whichever value is larger. GLYPH<SM590000> 1: Indicates that the basic insert algorithm is used. GLYPH<SM590000> 2: Indicates that the new insert algorithm is used.  INDEX_MEMORY_CONTROL DEFAULT_INSERT_ALGORITHM