NAME

       pmlogcheck - checks for invalid data in a PCP archive

SYNOPSIS

       pmlogcheck [-lz] [-n pmnsfile] [-S start] [-T finish] [-Z timezone] archive

DESCRIPTION

       pmlogcheck prints information about the nature of any invalid data which it detects in a PCP archive.  Of
       particular  interest  are  wrapped values for metrics which are expected to have monotonically increasing
       values.  The archive has the base name archive and must have been previously created using pmlogger(1).

       Normally pmlogcheck operates on the default Performance Metrics Namespace (pmns(5)), however  if  the  -n
       option is specified an alternative namespace is loaded from the file pmnsfile.

       The  command  line  options  -S  and -T can be used to specify a time window over which metrics should be
       summarized.  These options are common to many Performance Co-Pilot  tools  and  are  fully  described  in
       PCPIntro(1).

       The  -l  option prints the archive label, showing the log format version, the time and date for the start
       and (current) end of the archive, and the host from which the performance metrics values were collected.

       By default, pmlogcheck reports the time of day according to  the  local  timezone  on  the  system  where
       pmlogcheck  is  run.   The  -Z  option  changes the timezone to timezone in the format of the environment
       variable TZ as described in environ(5).  The -z option changes the timezone to the local timezone at  the
       host that is the source of the performance metrics, as specified in the label record of the archive log.

OUTPUT FORMAT

       For  each  metric  having  ``counter''  semantics (i.e. the metric is expected to increase monotonically)
       which has been detected as having wrapped at some  point  in  the  archive,  pmlogcheck  produces  output
       describing  the  metric name (with instance identifiers where appropriate), the internal storage type for
       the metric, the value of the metric before the counter wrap (with  its  associated  timestamp),  and  the
       value of the metric after the wrap (also with a timestamp).

       pmlogcheck produces two different timestamp formats, depending on the interval over which it is run.  For
       an  interval  greater  than  24 hours, the date is displayed in addition to the time at which the counter
       wrap occurred.  If the extent of the data being checked is less than 24 hours, a more precise  format  is
       used (time is displayed with millisecond precision, but without the date).

FILES

       $PCP_VAR_DIR/pmns/*
                 default PMNS specification files
       $PCP_LOG_DIR/pmlogger/hostname
                 default  directory  for  PCP  archives  containing  performance  data  collected  from the host
                 hostname.

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 configuration file, as described in pcp.conf(5).

SEE ALSO

       PCPIntro(1),  pmdumplog(1),  pmlogextract(1),  pmlogger(1),  pmlogmerge(1),  pmlogsummary(1),   pmval(1),
       pcp.conf(5), pcp.env(5) and pmns(5).

DIAGNOSTICS

       All are generated on standard error and are intended to be self- explanatory.

Performance Co-Pilot                                   PCP                                         PMLOGCHECK(1)