bootchart.conf(5) [centos man page]

BOOTCHART.CONF(5)						  bootchart.conf						 BOOTCHART.CONF(5)

NAME

       bootchart.conf - Boot performance analysis graphing tool configuration file

SYNOPSIS

       /etc/systemd/bootchart.conf

DESCRIPTION

       When starting, systemd-bootchart will read the configuration file bootchart.conf. This configuration file determines logging parameters and
       graph output.

OPTIONS

       Samples=500
	   Configure the amount of samples to record in total before bootchart exits. Each sample will record at intervals defined by Frequency=.

       Frequency=25
	   Configure the sample log frequency. This can be a fractional number, but must be larger than 0.0. Most systems can cope with values
	   under 25-50 without impacting boot time severely.

       Relative=no
	   Configures whether the left axis of the output graph equals time=0.0 (CLOCK_MONOTONIC start). This is useful for using bootchart at
	   post-boot time to profile an already booted system, otherwise the graph would become extremely large. If set to yes, the horizontal
	   axis starts at the first recorded sample instead of time=0.0.

       Filter=no
	   Configures whether the resulting graph should omit tasks that did not contribute significantly to the boot. Processes that are too
	   short-lived (only seen in one sample) or that do not consume any significant CPU time (less than 0.001sec) will not be displayed in the
	   output graph.

       Output=[path]
	   Configures the output directory for writing the graphs. By default, bootchart writes the graphs to /run/log.

       Init=[path]
	   Configures bootchart to run a non-standard binary instead of /sbin/init. This option is only relevant if bootchart was invoked from the
	   kernel command line with init=/usr/lib/systemd/systemd-bootchart.

       PlotMemoryUsage=no
	   If set to yes, enables logging and graphing of processes' PSS memory consumption.

       PlotEntropyGraph=no
	   If set to yes, enables logging and graphing of the kernel random entropy pool size.

       ScaleX=100
	   Horizontal scaling factor for all variable graph components.

       ScaleY=20
	   Vertical scaling factor for all variable graph components.

SEE ALSO

       systemd-bootchart(1), systemd.directives(7)

systemd 208															 BOOTCHART.CONF(5)

SYSTEMD-SYSCTL.SERVICE(8)                                     systemd-sysctl.service                                     SYSTEMD-SYSCTL.SERVICE(8)

NAME

       systemd-sysctl.service, systemd-sysctl - Configure kernel parameters at boot

SYNOPSIS

       /lib/systemd/systemd-sysctl [OPTIONS...] [CONFIGFILE...]

       systemd-sysctl.service

DESCRIPTION

       systemd-sysctl.service is an early boot service that configures sysctl(8) kernel parameters by invoking /lib/systemd/systemd-sysctl.

       When invoked with no arguments, /lib/systemd/systemd-sysctl applies all directives from configuration files listed in sysctl.d(5). If one
       or more filenames are passed on the command line, only the directives in these files are applied.

       In addition, --prefix= option may be used to limit which sysctl settings are applied.

       See sysctl.d(5) for information about the configuration of sysctl settings. After sysctl configuration is changed on disk, it must be
       written to the files in /proc/sys before it takes effect. It is possible to update specific settings, or simply to reload all
       configuration, see Examples below.

OPTIONS

       --prefix=
           Only apply rules with the specified prefix.

       -h, --help
           Print a short help text and exit.

       --version
           Print a short version string and exit.

EXAMPLES

       Example 1. Reset all sysctl settings

           systemctl restart systemd-sysctl

       Example 2. View coredump handler configuration

           # sysctl kernel.core_pattern
           kernel.core_pattern = |/libexec/abrt-hook-ccpp %s %c %p %u %g %t %P %I

       Example 3. Update coredump handler configuration

           # /lib/systemd/systemd-sysctl --prefix kernel.core_pattern

       This searches all the directories listed in sysctl.d(5) for configuration files and writes /proc/sys/kernel/core_pattern.

       Example 4. Update coredump handler configuration according to a specific file

           # /lib/systemd/systemd-sysctl 50-coredump.conf

       This applies all the settings found in 50-coredump.conf. Either /etc/sysctl.d/50-coredump.conf, or /run/sysctl.d/50-coredump.conf, or
       /usr/lib/sysctl.d/50-coredump.conf will be used, in the order of preference.

       See sysctl(8) for various ways to directly apply sysctl settings.

SEE ALSO

       systemd(1), sysctl.d(5), sysctl(8),

systemd 237                                                                                                              SYSTEMD-SYSCTL.SERVICE(8)