The parameter hierarchy

Configuration parameters are grouped according to the area of Adaptive Server behavior they affect. This makes it easier to identify all parameters that you might need to tune improve a particular area of Adaptive Server performance.

The groups are:

Although each parameter has a primary group to which it belongs, many have secondary groups to which they also belong. For example, number of remote connections belongs primarily to the Network Communication group, but it also belongs secondarily to the Adaptive Server Administration group and the Memory Use group. This reflects the fact that some parameters have implications for a number of areas of Adaptive Server behavior. sp_configure displays parameters in all groups to which they belong.

The syntax for displaying all groups and their associated parameters, and the current values for the parameters, is:

sp_configure

NoteThe number of parameters sp_configure returns depends on the value to which you have your display level set. See “User-defined subsets of the parameter hierarchy: display levels” for further information about display levels.

The following is the syntax for displaying a particular group and its associated parameter, where group_name is the name of the group you are interested in:

sp_configure "group_name"

For example, to display the Disk I/O group, type:

sp_configure "Disk I/O"
Group: Disk I/O

Parameter Name           Default Memory Used Config Value Run Value
--------------           ------- ----------- ------------ ---------
allow sql server async i/o     1           0            1         1
disk i/o structures          256           0          256       256
number of devices             10           0           10        10
page utilization percent      95           0           95        95

NoteIf the server uses a case-insensitive sort order, sp_configure with no parameters returns a list of all configuration parameters and groups in alphabetical order with no grouping displayed.