Event tracing uses a circular buffer that is over-written as new
events are recorded. The default buffer size holds the last 20
events, although this number may be over-ridden by using ppppmmmmssssttttoooorrrreeee(1)
to modify the metric ppppmmmmccccdddd....ccccoooonnnnttttrrrroooollll....ttttrrrraaaacccceeeebbbbuuuuffffssss.
Similarly once ppppmmmmccccdddd is running, the event tracing mask may be
dynamically modified by storing 1 (enable) or 0 (disable) into the
metrics ppppmmmmccccdddd....ccccoooonnnnttttrrrroooollll....ttttrrrraaaacccceeeeccccoooonnnnnnnn and ppppmmmmccccdddd....ccccoooonnnnttttrrrroooollll....ttttrrrraaaacccceeeeppppdddduuuu.
The event trace buffer will be dumped whenever an agent connection
is terminated by ppppmmmmccccdddd, or when any value is stored into the metric
ppppmmmmccccdddd....ccccoooonnnnttttrrrroooollll....dddduuuummmmppppttttrrrraaaacccceeee via ppppmmmmssssttttoooorrrreeee(1).
If a PDU exchange with an agent times out, the agent has violated the
requirement that it delivers metrics with little or no delay. This is
deemed a protocol failure and the agent is disconnected from ppppmmmmccccdddd. Any
subsequent requests for information from the agent will fail with a
status indicating that there is no agent to provide it.
It is possible to specify host-level access control to ppppmmmmccccdddd. This allows
one to prevent users from certain hosts from accessing the metrics
provided by ppppmmmmccccdddd and is described in more detail in the Section on ACCESS
./_p_m_c_d._l_o_g (or $$$${{{{PPPPCCCCPPPP____LLLLOOOOGGGGDDDDIIIIRRRR----////vvvvaaaarrrr////aaaaddddmmmm////ppppccccpppplllloooogggg}}}}////ppppmmmmccccdddd....lllloooogggg when
started automatically)
All messages and diagnostics are directed here
EEEENNNNVVVVIIIIRRRROOOONNNNMMMMEEEENNNNTTTT
PPPPMMMMCCCCDDDD____PPPPOOOORRRRTTTT
TCP/IP port for incoming connections, defaults to 4321.
ppppmmmmccccdddd does not kill its child agents, it only closes their pipes. If an
agent never checks for a closed pipe it may not terminate.
The configuration file parser will only read lines of less than 1200
characters. This is intended to prevent accidents with binary files.
The timeouts controlled by the ----tttt option apply to IPC between ppppmmmmccccdddd and
the PMDAs it spawns. This is independent of settings of the environment
variables PPPPMMMMCCCCDDDD____CCCCOOOONNNNNNNNEEEECCCCTTTT____TTTTIIIIMMMMEEEEOOOOUUUUTTTT and PPPPMMMMCCCCDDDD____RRRREEEEQQQQUUUUEEEESSSSTTTT____TTTTIIIIMMMMEEEEOOOOUUUUTTTT (see PPPPMMMMAAAAPPPPIIII(3))
which may be used respectively to control timeouts for client
applications trying to connect to ppppmmmmccccdddd and trying to receive information