pmstore(1) [centos man page]
PMSTORE(1) General Commands Manual PMSTORE(1) NAME
pmstore - modify performance metric values SYNOPSIS
pmstore [-h host] [-i instances] [-n pmnsfile] metricname value DESCRIPTION
Under certain circumstances, it is useful to be able to modify the values of performance metrics, for example to re-initialize counters or to assign new values to metrics that act as control variables. pmstore changes the current values for the nominated instances of a single performance metric, as identified by metricname and the list of instance identifiers following the -i argument. instances must be a single argument, with elements of the list separated by commas and/or white space. By default all instances of metricname will be updated. Normally pmstore operates on the default Performance Metrics Name Space (PMNS), however if the -n option is specified an alternative names- pace is loaded from the file pmnsfile. Unless directed to another host by the -h option, pmstore will interact with the Performance Metric Collector Daemon (PMCD) on the local host. The interpretation of value is dependent on the syntax used in its specification and the underlying data type of metricname, as follows. 1. If the metric has an integer type, then value should be an optional leading hyphen, followed either by decimal digits or ``0x'' and some hexadecimal digits. ``0X'' is also acceptable in lieu of ``0x''. See strtol(3C) and the related routines. 2. If the metric has a floating point type, then value should be either in the form of an integer described above, or a fixed point num- ber, or a number in scientific notation. See strtod(3C). 3. If the metric has a string type, then value is interpreted as a literal string of ASCII characters. 4. If the metric has any other type (i.e. PM_TYPE_EVENT or PM_TYPE_AGGREGATE) then no encoding of value from the command line makes sense, and the values of these metrics cannot be modified with pmstore. The output reports the old value and the new value for each updated instance of the requested metric. FILES
$PCP_VAR_DIR/pmns/* default PMNS specification files PCP ENVIRONMENT
Environment variables with the prefix PCP_ are used to parameterize the file and directory names used by PCP. On each installation, the file /etc/pcp.conf contains the local values for these variables. The $PCP_CONF variable may be used to specify an alternative configura- tion file, as described in pcp.conf(5). SEE ALSO
pmcd(1), pminfo(1), pmval(1), strtod(3C) and strtol(3C). DIAGNOSTICS
Two messages indicate a mismatch between the internal data type for metricname and the value provided. The value "???" is out of range for the data type (PM_TYPE_...) The value "???" is incompatible with the data type (PM_TYPE_...) Performance Co-Pilot PCP PMSTORE(1)
Check Out this Related Man Page
PCP(1) General Commands Manual PCP(1) NAME
pcp - summarize a Performance Co-Pilot (PCP) installation SYNOPSIS
pcp [-p] [-a archive] [-h host] [-n pmnsfile] DESCRIPTION
The pcp command summarizes the status of a Performance Co-Pilot (PCP) installation. The report includes: the OS version, a summary of the hardware inventory, the local timezone, details of valid PCP licenses, the PCP software version, the state of the pmcd(1) process and asso- ciated Performance Metrics Domain Agents (PMDAs), as well as information about any PCP archive loggers (pmlogger(1)) and PCP inference engines (pmie(1)) that are running. For more general information about PCP, refer to PCPIntro(1). With no arguments, pcp reports on the local host, however the following options are accepted: -a archive Report the PCP configuration as described in the PCP archive log archive. -h host Report the PCP configuration on host rather than the local host. -n pmnsfile Load an alternative Performance Metrics Name Space (pmns(5)) from the file pmnsfile. -p Display pmie performance information - counts of rules evaluating to true, false, or indeterminate, as well as the expected rate of rule calculation, for each pmie process running on the default host. Refer to the individual metric help text for full details on these values. All of the displayed values are performance metric values and further information for each can be obtained using the command: $ pminfo -dtT metric The complete set of metrics required by pcp to produce its output is contained in $PCP_SYSCONF_DIR/pmlogger/config.pcp. When displaying running pmlogger instances, as a space-saving measure pcp will display a relative path to the archive being created if that archive is located below a pcplog subdirectory, otherwise the full pathname is displayed (the PCP log rotation and periodic pmlogger check- ing facilities support the creation of archives below $PCP_LOG_DIR/pmlogger/<hostname>). A similar convention is used for trimming the amount of information displayed for running pmie instances, where configuration files below $PCP_VAR_DIR/config will be displayed in truncated form. FILES
$PCP_SYSCONF_DIR/pmlogger/config.pcp pmlogger configuration file for collecting all of the metrics required by pcp. PCP ENVIRONMENT
Environment variables with the prefix PCP_ are used to parameterize the file and directory names used by PCP. On each installation, the file /etc/pcp.conf contains the local values for these variables. The $PCP_CONF variable may be used to specify an alternative configura- tion file, as described in pcp.conf(5). SEE ALSO
PCPIntro(1), pmcd(1), pmie(1), pmlogger(1), pcp.conf(5) and pcp.env(5). DIAGNOSTICS
pcp will terminate with an exit status of 1 if pmcd on the target host could not be reached or the archive could not be opened, or 2 for any other error. Performance Co-Pilot PCP PCP(1)