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マニュアルページセクション 1M: システム管理コマンド     Oracle Solaris 11 Information Library (日本語)
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はじめに

紹介

システム管理コマンド - パート 1

システム管理コマンド - パート 2

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システム管理コマンド - パート 3

rcapd

- resource cap enforcement daemon

形式

rcapd [-d]

機能説明

The rcapd daemon enforces resource caps on collections of processes. Per-project and per-zone physical memory caps are supported. For information about projects, see project(4). For zones information, see zones(5)

When the resident set size (RSS) of a collection of processes exceeds its cap, rcapd takes action and reduces the RSS of the collection.

The virtual memory system divides physical memory into segments known as pages. To read data from a file into memory, the virtual memory system reads in individual pages. To reduce resource consumption, the daemon can page out, or relocate, infrequently used pages to an area outside of physical memory.

In the project file, caps are defined for projects that have positive values for the following project attribute:

rcap.max-rss

The total amount of physical memory, in bytes, that is available to the project's member processes

See project(4) for a description of project attributes.

For a system with one or more zones, you can dynamically set the rcap.max-rss value for a zone with rcapadm(1M). To set a persistent cap on memory usage within a zone, you use zonecfg(1M).

You configure rcapd through the use of rcapadm(1M). The daemon can be monitored with rcapstat(1). Configuration changes are incorporated into rcapd by sending it SIGHUP (see kill(1)), or according to the configuration interval (see rcapadm(1M)).

オプション

The following option is supported:

-d

Enable debug mode. Messages are displayed on the invoking user's terminal.

使用例

例 1 Setting Resident Set Size Cap Attribute

The following line in the /etc/project database sets an RSS cap of 1073741824 bytes for a project named foo.

foo:100::foo,root::rcap.max-rss=10737418240

終了ステータス

The following exit values are returned:

0

Successful completion.

1

An error occurred.

2

Invalid command-line options were specified.

ファイル

/etc/project

Project database.

属性

See attributes(5) for descriptions of the following attributes:

ATTRIBUTE TYPE
ATTRIBUTE VALUE
Availability
system/resource-mgmt/resource-caps
Interface Stability
Committed

関連項目

rcapstat(1), svcs(1), rcapadm(1M), zonecfg(1M), svcadm(1M), project(4), attributes(5), smf(5), zones(5)

“Physical Memory Control Using the Resource Capping Daemon” in 『Oracle Solaris のシステム管理 (Oracle Solaris ゾーン、Oracle Solaris 10 ゾーン、およびリソース管理)』

注意事項

If killed with SIGKILL, rcapd can leave processes in a stopped state. Use SIGTERM to cause rcapd to terminate properly.

A collection's RSS can exceed its cap for some time before the cap is enforced, even if sufficient pageable memory is available. This period of time can be reduced by shortening the RSS sampling interval with rcapadm.

The rcapd service is managed by the service management facility, smf(5), under the service identifier:

svc:/system/rcap:default

Administrative actions on this service, such as enabling, disabling, or requesting restart, can be performed using svcadm(1M). The service's status can be queried using the svcs(1) command.