PMLOGCHECK(1)						      General Commands Manual						     PMLOGCHECK(1)

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 time-
       zone 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	configura-
       tion 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)