NAME | C SYNOPSIS | DESCRIPTION | SEE ALSO | DIAGNOSTICS | COLOPHON |
PMFETCHARCHIVE(3) Library Functions Manual PMFETCHARCHIVE(3)
pmFetchArchive - get performance metrics directly from a set if ar‐ chive logs
#include <pcp/pmapi.h> int pmFetchArchive(pmResult **result); cc ... -lpcp
pmFetchArchive is a variant of pmFetch(3) that may only be used when the current Performance Metrics Application Programming Interface (PMAPI) context is associated with a set of archive logs. The result is instantiated with all of the metrics (and instances) from the next archive record, consequently there is no notion of a list of desired metrics, and the instance profile of the PMAPI context is ignored. pmFetchArchive may return a result in which numpmid is zero. This is a <mark> record that indicates a temporal discontinuity in the time series of performance metrics. This can happen at the boundary between archive logs in a set or if the archive log associated with the current PMAPI context was created using pmlogextract(1) to concatenate two or more PCP archive logs, and the <mark> record marks a point in time between the end of one input archive and the start of the next input archive. It is expected that pmFetchArchive would be used to create utilities that scan sets of archive logs, while the more common access to the archives would be via the pmFetch(3) interface. To skip records within the set of archive logs, use pmSetMode(3) to change the collection time within the current PMAPI context, then call pmFetchArchive. Note that the result returned by pmFetchArchive is dynamically allocated, and must be released using pmFreeResult(3), not free(3). See pmFetch(3) and pmFreeResult(3) for further details. pmFetchArchive returns zero on success.
PMAPI(3), pmFetch(3), pmFreeResult(3), pmNewContext(3), pmSetMode(3) and pmTrimNameSpace(3).
PM_ERR_NOTARCHIVE the current PMAPI context is not associated with a set of archive logs
This page is part of the PCP (Performance Co-Pilot) project.
Information about the project can be found at ⟨http://www.pcp.io/⟩.
If you have a bug report for this manual page, send it to
pcp@oss.sgi.com. This page was obtained from the project's upstream
Git repository ⟨git://git.pcp.io/pcp⟩ on 2017-07-05. If you discover
any rendering problems in this HTML version of the page, or you
believe there is a better or more up-to-date source for the page, or
you have corrections or improvements to the information in this
COLOPHON (which is not part of the original manual page), send a mail
to man-pages@man7.org
Performance Co-Pilot PCP PMFETCHARCHIVE(3)
Pages that refer to this page: pcpintro(3), pmfetch(3), pmgetarchiveend(3), pmregisterderived(3), pmsetmode(3)