получить и установить элементы управления производными метриками (get and set controls for derived metrics)
Имя (Name)
pmGetDerivedControl, pmSetDerivedControl - get and set controls
for derived metrics
Синопсис C (C Synopsis)
#include <pcp/pmapi.h>
int pmGetDerivedControl(int what, int *valuep);
int pmSetDerivedControl(int what, int value);
cc ... -lpcp
Описание (Description)
These routines may be used to influence the behaviour of the
derived metric services that are activated for global derived
metrics using pmRegisterDerived(3), pmRegisterDerivedMetric(3)
and pmLoadDerivedConfig(3), or per-context derived metrics using
pmAddDerived(3) and pmAddDerivedDerived(3).
The what argument selects a control, the value argument provides
a value for pmSetDerivedControl and the valuep argument is used
to return the value for pmGetDerivedControl.
The what argument has one of the following values:
PCP_DERIVED_GLOBAL_LIMIT
The maximum number of global derived metrics that may be
defined. The value -1 indicates no limit.
PCP_DERIVED_CONTEXT_LIMIT
The maximum number of per-context derived metrics that may
be defined. The value -1 indicates no limit.
PCP_DERIVED_DEBUG_SYNTAX
Debug diagnostics during parsing of derived metric
expression. The value 1 enables the diagnostics, the
value 0 disables them.
PCP_DERIVED_DEBUG_SEMANTICS
Debug diagnostics for semantic checks during the binding
of metrics in the derived metric expression to the
available metrics in a new PMAPI context. The value 1
enables the diagnostics, the value 0 disables them.
PCP_DERIVED_DEBUG_EVAL
Debug diagnostics when derived metrics are used in PMAPI
operations like pmFetch(3), pmGetChildren(3),
pmGetChildrenStatus(3), pmLookupDesc(3), pmLookupName(3),
pmNameAll(3), pmNameID(3) and pmTraversePMNS(3).
Возвращаемое значение (Return value)
Both routines return 0 on success, else a value less than 0 that
can be decoded using pmErrStr(3).
Смотри также (See also)
PCPIntro(1), pmAddDerived(3), pmAddDerivedMetric(3), PMAPI(3),
pmErrStr(3), pmLoadDerivedConfig(3), pmRegisterDerived(3),
pmRegisterDerivedMetric(3) and PMNS(5).
