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.
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),
pmlogextract(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.