gistfile1.txt

/*
 * DTrace Tunable Variables
 *
 * The following variables may be tuned by adding a line to /etc/system that
 * includes both the name of the DTrace module ("dtrace") and the name of the
 * variable.  For example:
 *
 *   set dtrace:dtrace_destructive_disallow = 1
 *
 * In general, the only variables that one should be tuning this way are those
 * that affect system-wide DTrace behavior, and for which the default behavior
 * is undesirable.  Most of these variables are tunable on a per-consumer
 * basis using DTrace options, and need not be tuned on a system-wide basis.
 * When tuning these variables, avoid pathological values; while some attempt
 * is made to verify the integrity of these variables, they are not considered
 * part of the supported interface to DTrace, and they are therefore not
 * checked comprehensively.  Further, these variables should not be tuned
 * dynamically via "mdb -kw" or other means; they should only be tuned via
 * /etc/system.
 */
int             dtrace_destructive_disallow = 0;
dtrace_optval_t dtrace_nonroot_maxsize = (16 * 1024 * 1024);
size_t          dtrace_difo_maxsize = (256 * 1024);
dtrace_optval_t dtrace_dof_maxsize = (256 * 1024);
size_t          dtrace_global_maxsize = (16 * 1024);
size_t          dtrace_actions_max = (16 * 1024);
size_t          dtrace_retain_max = 1024;
dtrace_optval_t dtrace_helper_actions_max = 1024;
dtrace_optval_t dtrace_helper_providers_max = 32;
dtrace_optval_t dtrace_dstate_defsize = (1 * 1024 * 1024);
size_t          dtrace_strsize_default = 256;
dtrace_optval_t dtrace_cleanrate_default = 9900990;             /* 101 hz */
dtrace_optval_t dtrace_cleanrate_min = 200000;                  /* 5000 hz */
dtrace_optval_t dtrace_cleanrate_max = (uint64_t)60 * NANOSEC;  /* 1/minute */
dtrace_optval_t dtrace_aggrate_default = NANOSEC;               /* 1 hz */
dtrace_optval_t dtrace_statusrate_default = NANOSEC;            /* 1 hz */
dtrace_optval_t dtrace_statusrate_max = (hrtime_t)10 * NANOSEC;  /* 6/minute */
dtrace_optval_t dtrace_switchrate_default = NANOSEC;            /* 1 hz */
dtrace_optval_t dtrace_nspec_default = 1;
dtrace_optval_t dtrace_specsize_default = 32 * 1024;
dtrace_optval_t dtrace_stackframes_default = 20;
dtrace_optval_t dtrace_ustackframes_default = 20;
dtrace_optval_t dtrace_jstackframes_default = 50;
dtrace_optval_t dtrace_jstackstrsize_default = 512;
int             dtrace_msgdsize_max = 128;
hrtime_t        dtrace_chill_max = 500 * (NANOSEC / MILLISEC);  /* 500 ms */
hrtime_t        dtrace_chill_interval = NANOSEC;                /* 1000 ms */
int             dtrace_devdepth_max = 32;
int             dtrace_err_verbose;
hrtime_t        dtrace_deadman_interval = NANOSEC;
hrtime_t        dtrace_deadman_timeout = (hrtime_t)10 * NANOSEC;
hrtime_t        dtrace_deadman_user = (hrtime_t)30 * NANOSEC;
hrtime_t        dtrace_unregister_defunct_reap = (hrtime_t)60 * NANOSEC;