There are three special variables that contain the names of all variable of the same group. This command can be used to alter several system variables in very exceptional circumstances. It should occur in the configuration file before any other configuration options. The default values of these variables have been carefully optimized for a wide range of network speeds and reliability expectations. In general, they interact in intricate ways that are hard to predict and some combinations can result in some very nasty behavior.
All arguments are in floating point seconds or seconds per second.
The minpoll argument is an integer in seconds to the power of two. The argument becomes the new value for the step threshold, normally 0.128 s. If set to zero, step adjustments will never occur. In general, if the intent is only to avoid step adjustments, the step threshold should be left alone and the -x command line option be used instead. The argument becomes the new value for the panic threshold, normally 1000 s.