PMFREEEVENTRESULT(3) Library Functions Manual PMFREEEVENTRESULT(3)NAME
pmFreeEventResult - release storage allocated for unpacked event records
C SYNOPSIS
#include <pcp/pmapi.h>
void pmFreeEventResult(pmResult **rset);
cc ... -lpcp
DESCRIPTION
When processing event records, if pmUnpackEventRecords(3) is used to unpack event records from a metric within a pmResult structure with a
value of type PM_TYPE_EVENT then the structure returned from pmUnpackEventRecords(3) is a NULL pointer terminated array of pointers to
pmResult structures, one for each event record.
pmFreeEventResult is a convenience method that frees all of the pmResult structures and the array of pointers (rset).
SEE ALSO PMAPI(3) and pmUnpackEventRecords(3).
Performance Co-Pilot PCP PMFREEEVENTRESULT(3)
Check Out this Related Man Page
PMSTORE(3) Library Functions Manual PMSTORE(3)NAME
pmStore - modify values of performance metrics
C SYNOPSIS
#include <pcp/pmapi.h>
int pmStore(const pmResult *result);
cc ... -lpcp
DESCRIPTION
In some special cases it may be helpful to modify the current values of performance metrics, e.g. to reset a counter to zero, or to modify
a ``metric'' which is a control variable for some agent collecting performance metrics.
The routine pmStore is a lightweight inverse of pmFetch(3).
The caller must build the pmResult data structure (of course, this could have been returned from an earlier pmFetch(3) call) and then call
pmStore.
It is an error to pass a request to pmStore in which the numval field within any of the pmValueSet structure has a value less than one.
The current Performance Metrics Application Programming Interface (PMAPI) context must be one with a host as the source of metrics, and the
current value of the nominated metrics will be changed, i.e. pmStore cannot be used to make retrospective changes to information in either
the archive logs, or in the recent past for real-time sources of metrics.
The return code from pmStore is zero for success.
SEE ALSO PMAPI(3), pmFetch(3) and pmSetMode(3).
DIAGNOSTICS
PM_ERR_GENERIC
At least one of the modifications was rejected. No other status is available from below the PMAPI (this is the lightweight part of
the functionality!). In cases where the outcome of pmStore for individual metrics is important, the caller should make one call to
pmStore for each metric. On the other hand, a bulk modification can be performed in a single pmStore call for situations in which
the outcome is not critical.
PM_ERR_NOTHOST
The current PMAPI context is an archive rather than a host, or it is a host that is not set to the current time, i.e. has been
``rewound'' to the recent past using pmSetMode(3).
PM_ERR_TOOSMALL
The number of metrics specified in result is less than one.
PM_ERR_VALUE
One or more of the pmValueSets in result has a numval field with a value less than one.
Performance Co-Pilot PCP PMSTORE(3)
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