* suffix) or millions of
                  operations per second (**M** suffix).
    
           **io** The **bi** and **bo** columns indicate the average rate per second
                  of block input and block output operations (respectfully)
                  during the interval.  Unless all file systems have a 1
                  Kbyte block size, these rates do not directly indicate
                  Kbytes transferred.
    
                  If the values become large, they are reported as thousands
                  of operations per second (**K** suffix) or millions of
                  operations per second (**M** suffix).
    
           **system** Interrupt rate (**in**) and context switch rate (**cs**).  Rates
                  are expressed as average operations per second during the
                  interval.  Note that the interrupt rate is normally at
                  least _HZ_ (the clock interrupt rate, usually 100)
                  interrupts per second.
    
                  If the values become large, they are reported as thousands
                  of operations per second (**K** suffix) or millions of
                  operations per second (**M** suffix).
    
           **cpu** Percentage of CPU time spent executing user and "nice
                  user" code (**us**), system and interrupt processing code
                  (**sy**), idle loop (**id**).
    
           If any values for the associated performance metrics are
           unavailable, the value appears as ``?'' in the output.
    

##  FILES  top

    
    
           _$PCP_VAR_DIR/pmns/*_
                default PMNS specification files
    
           _$PCP_VAR_DIR/config/pmlogger/config.pmstat_
                [pmlogger(1)](../man1/pmlogger.1.html) configuration for creating an archive suitable
                for replay with **pmstat**
    

##  PCP ENVIRONMENT  top

    
    
           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 configuration file, as described in
           [pcp.conf(5)](../man5/pcp.conf.5.html).
    
           For environment variables affecting PCP tools, see
           [pmGetOptions(3)](../man3/pmGetOptions.3.html).
    

##  SEE ALSO  top

    
    
           [PCPIntro(1)](../man1/PCPIntro.1.html), [pmclient(1)](../man1/pmclient.1.html), [pmtime(1)](../man1/pmtime.1.html), [PMAPI(3)](../man3/PMAPI.3.html), [pmNewContext(3)](../man3/pmNewContext.3.html),
           [pcp.conf(5)](../man5/pcp.conf.5.html), [pcp.env(5)](../man5/pcp.env.5.html) and [PMNS(5)](../man5/PMNS.5.html).
    

##  COLOPHON  top

    
    
           This page is part of the _PCP_ (Performance Co-Pilot) project.
           Information about the project can be found at 
           â¨<http://www.pcp.io/>â©.  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
           â¨<https://github.com/performancecopilot/pcp.git>â© on 2023-12-22.
           (At that time, the date of the most recent commit that was found
           in the repository was 2023-12-16.)  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               PCP                         _PMSTAT_(1)
    

* * *

Pages that refer to this page: [ pcpintro(1) ](../man1/pcpintro.1.html) , [
pmcd(1) ](../man1/pmcd.1.html) , [ pmclient(1) ](../man1/pmclient.1.html) ,