System Administration Commands rcapadm(1M)
NAME
rcapadm - configure resource capping daemon
SYNOPSIS
rcapadm
rcapadm [ [-n] -E -D]
[-i interval=value,...,interval=value] [-c percent]
[-z zonename -m maxvalue]
DESCRIPTION
The rcapadm command allows a user with the privileges
described below to configure various attributes of the
resource capping daemon. If used without arguments, rcapadm
displays the current status of the resource capping daemon
if it has been configured. See rcapd(1M) for more informa-
tion.
In the current release of the Solaris operating environment,
rcapadm is available to users with all privileges and to
users who have the Process Management profile in their list
of profiles. The System Administrator role includes the Pro-
cess Management profile.
OPTIONS
-c percent
Set the minimum physical memory utilization for memory
cap enforcement. Caps will not be enforced until the
physical memory available to processes is low. The per-
cent value should be in the range 0 to 100. The minimum
(and default) value is 0, which means that memory caps
are always enforced.
-D
Disable the resource capping daemon so that it will not
be started when the system is booted. Also stop the
resource capping daemon now, if the -n option is not
specified and it is currently running.
-E
Enable the resource capping daemon so that it will be
started each time the system is booted. Also start the
resource capping daemon now, if the -n option is not
specified and it is not currently running.
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System Administration Commands rcapadm(1M)
-i interval=value,...,interval=value
Set intervals for various periodic operations performed
by rcapd. All intervals are specified in seconds. You
can set the following intervals:
scan The interval at which rcapd scans for new
processes. The default scan interval is every
15 seconds. The minimum value is 1 second.
sample The interval of process resident set size sam-
pling. The default sample interval is every 5
seconds. The minimum value is 1 second.
report The interval at which various paging statis-
tics are updated by rcapd, in seconds. These
statistics can be viewed by using
rcapstat(1SRM). The default reporting interval
is every 5 seconds. When the interval is set
to 0, statistics will not be updated.
Note -
Paging refers to the act of relocating por-
tions of memory, called pages, to or from
physical memory. rcapd pages out the most
infrequently used pages.
config The reconfiguration interval, in seconds. At
each reconfiguration event, rcapd checks its
configuration file for updates, and scans the
project databases for new project caps. The
default reconfiguration interval is every 60
seconds. The minimum interval is 0. When the
interval is set to 0, no periodic reconfigura-
tion occurs, although the running daemon can
still be reconfigured by sending it SIGHUP.
-m maxvalue
Used in conjunction with the -z option. Specifies a
value for rcap.max-rss, a dynamically-set cap on the
usage of physical memory for the zone specified by -z.
You can apply a scale (K, M, G, T) to the value you
specify. K means kilobyte; M, megabyte; G, gigabyte; and
T, terabyte. For example, 100M is 100 megabytes.
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System Administration Commands rcapadm(1M)
-n
Do not affect the running state of the resource capping
daemon when enabling or disabling it.
-z zonename
Used in conjunction with the -m option. Specifies the
zone for which you are dynamically specifying a cap on
physical memory usage (using -m).
Note -
To set a persistent cap on memory usage within a zone, use
zonecfg(1M).
EXAMPLES
Example 1 Configuring the Resource Capping Daemon with
Immediate Enforcement
# rcapadm -E -i scan=15,sample=5,report=5,config=60 -c 0
Example 2 Specifying a Resource Cap for a Zone
The command shown below specifies the maximum amount of
memory that can be consumed by a specified zone. Note that
this value lasts only until the next reboot. To set a per-
sistent cap, use zonecfg(1M).
# rcapadm -z testzone -m 512M
EXIT STATUS
The following exit values are returned:
0 Successful completion. The modifications to the current
configuration were valid and made successfully.
1 An error occurred. A fatal error occurred either in
obtaining or modifying the resource capping configura-
tion.
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System Administration Commands rcapadm(1M)
2 Invalid command-line options were specified.
ATRIBUTES
See attributes(5) for descriptions of the following attri-
butes:
ATRIBUTE TYPE ATRIBUTE VALUE
Availability SUNWrcapu
Interface Stability Evolving
The -z and -m options are committed interfaces.
SEE ALSO
rcapstat(1), rcapd(1M), zonecfg(1M), project(4), attri-
butes(5), zones(5)
"Physical Memory Control Using the Resource Capping Daemon"
in System Administration Guide: Solaris Containers-Resource
Management, and Solaris Zones
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