Red Hat Summit Red Hat SummitSupportoConsoleSviluppatoriInizia una provaContatti

Questo contenuto non è disponibile nella lingua selezionata.

Chapter 4. PCP Metrics

Metrics are stored in a tree-like structure. For example, all network metrics are stored in a node named network. Each metric may be a single value, or a list of values, known as instances. For example, kernel load has three instances, a 1-minute, 5-minute, and 15-minute average.

For every metric entry, PCP stores both its data and metadata. This includes the metrics description, data type, units, and dimensions. For example, the metadata enables PCP to output multiple metrics with different dimensions.

The value of a counter metric only increases. For example, a count of disk write operations on a specific device only increases. When you query the value of a counter metric, PCP converts this into a rate value by default.

In addition to system metrics such as CPU, memory, kernel, XFS, disk, and network, the following metrics are configured:

Expand
MetricDescription

hotproc.*

Basic metrics of key Satellite processes

apache.*

Apache HTTP Server metrics

postgresql.*

Basic PostgreSQL statistics

mmv.fm_rails_*

Satellite metrics

4.1. Identifying Available Metrics
Copia collegamento

  • To list all metrics available via PCP, enter the following command: 

    # pminfo
    Copy to Clipboard Toggle word wrap

  • To list all Satellite metrics and their descriptions, enter the following command: 

    # foreman-rake telemetry:metrics
    Copy to Clipboard Toggle word wrap

  • To list the archived metrics, enter the following command: 

    # less /var/log/pcp/pmlogger/$(hostname)/pmlogger.log
    Copy to Clipboard Toggle word wrap

  • The pmlogger daemon archives data as it is received, according to its configuration. To confirm the active archive file, enter the following command: 

    # pcp | grep logger
    Copy to Clipboard Toggle word wrap

    The output includes the file name of the active archive file, for example: 

    /var/log/pcp/pmlogger/satellite.example.com/20180814.00.10
    Copy to Clipboard Toggle word wrap
Red Hat logoGithubredditYoutubeTwitter

Formazione

Prova, acquista e vendi

Community

Informazioni sulla documentazione di Red Hat

Aiutiamo gli utenti Red Hat a innovarsi e raggiungere i propri obiettivi con i nostri prodotti e servizi grazie a contenuti di cui possono fidarsi. Esplora i nostri ultimi aggiornamenti.

Rendiamo l’open source più inclusivo

Red Hat si impegna a sostituire il linguaggio problematico nel codice, nella documentazione e nelle proprietà web. Per maggiori dettagli, visita il Blog di Red Hat.

Informazioni su Red Hat

Forniamo soluzioni consolidate che rendono più semplice per le aziende lavorare su piattaforme e ambienti diversi, dal datacenter centrale all'edge della rete.

Theme

© 2026 Red HatTorna in cima