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Tunables are modified by using SAM or the kctune utility. Changed tunables take effect only after relinking the kernel and booting the system from the new kernel.
The values of system tunables can be examined by selecting Kernel Configuration > Configuration Parameters in SAM.
DMP tunables can also be set by using the vxdmpadm command as shown here:
# vxdmpadm settune dmp_tunable=value
The values of these tunables can be displayed by using this command:
# vxdmpadm gettune [dmp_tunable]
The vxdmpadm command also allows you to configure how DMP responds to I/O errors at the level of the paths to individual arrays.
See "Administering DMP using vxdmpadm" on page 135.