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NAME | C SYNOPSIS | DESCRIPTION | DIAGNOSTICS | SEE ALSO | COLOPHON |
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PMUNREGISTERDERIVED(3) Library Functions Manual PMUNREGISTERDERIVED(3)
pmUnregisterDerived - unregister a derived metric
#include <pcp/pmapi.h>
int pmUnregisterDerived(char *name);
cc ... -lpcp
Derived metrics provide a way of extending the Performance Metrics
Name Space (PMNS) with new metrics defined at the PCP client-side
using expressions over the existing performance metrics.
Global derived metrics are created by calling
pmRegisterDerived(3), pmRegisterDerivedMetric(3) or
pmLoadDerivedConfig(3). Per-context derived metrics are created
by calling pmAddDerived(3) or pmAddDerivedMetric(3).
pmUnregisterDerived removes the definition of the derived metric
name from the set of glabal derived metrics and from every active
PMAPI context.
On success, pmUnregisterDerived returns a value greater than or
equal to zero being the number of contexts from which name was re‐
moved.
Othewise pmUnregisterDerived returns a PMAPI error and the appli‐
cation should call pmErrStr(3) to retrieve the corresponding error
message.
PCPIntro(1), PMAPI(3), pmAddDerived(3), pmAddDerivedMetric(3),
pmErrStr(3), pmLoadDerivedConfig(3), pmRegisterDerived(3),
pmRegisterDerivedMetric(3) and PMNS(5).
This page is part of the PCP (Performance Co-Pilot) project. In‐
formation 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@groups.io. This page was obtained from the project's upstream
Git repository ⟨https://github.com/performancecopilot/pcp.git⟩ on
2026-01-16. (At that time, the date of the most recent commit
that was found in the repository was 2026-01-16.) 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 PMUNREGISTERDERIVED(3)
Pages that refer to this page: pmaddderived(3), pmloadderivedconfig(3), pmregisterderived(3)
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HTML rendering created 2026-01-16 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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