Linux and UNIX Man Pages

Linux & Unix Commands - Search Man Pages

pmlogcheck(1) [centos man page]

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)

Check Out this Related Man Page

PMWTF(1)						      General Commands Manual							  PMWTF(1)

NAME
pmwtf - compares archives and report significant differences SYNOPSIS
pmwtf [-dz] [-p precision] [-q thres] [-S starttime] [-T endtime] [-B starttime] [-E endtime] [-x metric] [-X file] [-Z timezone] archive1 [archive2] DESCRIPTION
pmwtf compares the average values for every metric in either one or two archives, in a given time window, for changes that are likely to be of interest when searching for performance regressions. The archive log has the base name archive and must have been previously created using pmlogger(1). The pmlogsummary(1) utility is used to obtain the average values used for comparison. There are two sorts of invocation of the tool: with either one or two archives. In the first case, the only sensible command line requires use of all four time window arguments. These are specified using the same time window format described in PCPIntro(1), and are -S and -T for the start and end times of the first time window of interest in the archive, and -B and -E for the start and end times of the second time window of interest. In the second case, with two archives, the -B and -E options might be unnecessary. This might be the case, for example, when comparing the same time window of two consecutive days (usually two separate archives), or a time window on the same day of different weeks. In either case, pmwtf produces a sorted summary of those metrics in the specified window whose values have deviated the most from a minimal threshold. The level of deviation is calculated by dividing the average value of each metric in both logs, and then calculating whether the ratio falls outside of a range considered normal. This ratio can be adjusted using the -q option, and by default it is 2 (i.e. report all metrics with average values that have more than doubled in the two time windows or more than halved in the two time windows). Should any metrics be present in one window but missing from the other, a diagnostic will be displayed listing each missing metric and the archive from which it was missing. The remaining options control the specific information to be reported. Metrics with counter semantics are converted to rates before being evaluated. -p Print all floating point numbers with precision digits after the decimal place. -x Compare each metric in each archive in the time windows specified to a given egrep(1) pattern, excluding those that match from the report output. -X Allows a file to be specified which containing egrep(1) patterns which are applied to the metric names to optionally exclude some from the report. -z Use the local timezone from the given archives. -Z Changes the timezone in the archive labels to timezone in the format of the environment variable TZ as described in environ(5). FILES
$PCP_LOG_DIR/pmlogger/hostname Default directory for PCP archives containing performance metric values 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), pmlogger(1), pmlogsummary(1), egrep(1), pcp.conf(5) and pcp.env(5). Performance Co-Pilot PCP PMWTF(1)
Man Page

Featured Tech Videos