jdk/src/linux/doc/man/ja/jhat.1
author lana
Sat, 09 Aug 2014 21:27:42 -0700
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'\" t
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.\" Copyright (c) 2006, 2013, Oracle and/or its affiliates. All rights reserved.
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.\" Title: jhat
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.\" Language: English
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.\" Date: 2013年11月21日
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.\" SectDesc: トラブルシューティング・ツール
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.\" Software: JDK 8
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.\" Arch: 汎用
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.\"
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.\" DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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.\"
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.\" This code is free software; you can redistribute it and/or modify it
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.\" under the terms of the GNU General Public License version 2 only, as
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.\" published by the Free Software Foundation.
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.\"
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.\" This code is distributed in the hope that it will be useful, but WITHOUT
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.\" ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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.\" FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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.\" version 2 for more details (a copy is included in the LICENSE file that
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.\" accompanied this code).
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.\"
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.\" You should have received a copy of the GNU General Public License version
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.\" 2 along with this work; if not, write to the Free Software Foundation,
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.\" Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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.\"
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.\" Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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.\" or visit www.oracle.com if you need additional information or have any
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.\" questions.
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.\"
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.pl 99999
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.TH "jhat" "1" "2013年11月21日" "JDK 8" "トラブルシューティング・ツール"
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.\" -----------------------------------------------------------------
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.\" * Define some portability stuff
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.\" -----------------------------------------------------------------
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.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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.\" http://bugs.debian.org/507673
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.\" http://lists.gnu.org/archive/html/groff/2009-02/msg00013.html
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.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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.ie \n(.g .ds Aq \(aq
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.el       .ds Aq '
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.\" -----------------------------------------------------------------
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.\" * set default formatting
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.\" -----------------------------------------------------------------
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.\" disable hyphenation
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.nh
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.\" disable justification (adjust text to left margin only)
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.ad l
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.\" -----------------------------------------------------------------
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.\" * MAIN CONTENT STARTS HERE *
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.\" -----------------------------------------------------------------
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.SH "NAME"
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jhat \- Javaヒープを分析します。このコマンドは試験的なもので、サポートされていません。
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.SH "概要"
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.sp
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.if n \{\
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.RS 4
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.\}
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.nf
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\fIjhat\fR [ \fIoptions\fR ] \fIheap\-dump\-file\fR 
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.fi
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.if n \{\
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.RE
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.\}
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.PP
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\fIoptions\fR
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.RS 4
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コマンドライン・オプション。オプションを参照してください。
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.RE
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.PP
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\fIheap\-dump\-file\fR
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.RS 4
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ブラウズ対象となるJavaバイナリ・ヒープ・ダンプ・ファイル。複数のヒープ・ダンプを含むダンプ・ファイルの場合、\fImyfile\&.hprof#3\fRのようにファイル名の後に\fI#<number>\fRを付加することで、ファイル内の特定のダンプを指定できます。
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.RE
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.SH "説明"
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.PP
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\fIjhat\fRコマンドはJavaヒープ・ダンプ・ファイルを解析し、Webサーバーを開始します。\fIjhat\fRコマンドを使用して、お気に入りのブラウザでヒープ・ダンプを参照できます。\fIjhat\fRコマンドは、既知のクラス\fIMyClass\fRのすべてのインスタンスを表示するなどの事前設計済の問合せやObject Query Language (OQL)をサポートします。ヒープ・ダンプの問合せを除き、OQLはSQLに似ています。OQLのヘルプには、\fIjhat\fRコマンドによって表示されるOQLヘルプ・ページからアクセスできます。デフォルト・ポートを使用する場合、OQLのヘルプはhttp://localhost:7000/oqlhelp/で利用可能です。
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.PP
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Javaのヒープ・ダンプを生成するには、次のいくつかの方法があります。
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.sp
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.RS 4
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.ie n \{\
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\h'-04'\(bu\h'+03'\c
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.\}
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.el \{\
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.sp -1
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.IP \(bu 2.3
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.\}
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\fIjmap \-dump\fRオプションを使用して実行時にヒープ・ダンプを取得します。jmap(1)を参照してください。
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.RE
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.RS 4
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.\}
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.el \{\
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.sp -1
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.IP \(bu 2.3
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.\}
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\fIjconsole\fRオプションを使用して\fIHotSpotDiagnosticMXBean\fR経由で実行時にヒープ・ダンプを取得します。jconsole(1)および\fIHotSpotDiagnosticMXBean\fRのインタフェースの説明(
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http://docs\&.oracle\&.com/javase/8/docs/jre/api/management/extension/com/sun/management/HotSpotDiagnosticMXBean\&.html)を参照してください。
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.RE
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.sp
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.RS 4
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.ie n \{\
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.\}
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.el \{\
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.sp -1
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.IP \(bu 2.3
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.\}
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ヒープ・ダンプは、\fI\-XX:+HeapDumpOnOutOfMemoryError\fR
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Java仮想マシン(JVM)オプションを指定することで、\fIOutOfMemoryError\fRがスローされたときに生成されます。
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.RE
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.sp
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.RS 4
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.ie n \{\
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.\}
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.el \{\
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.sp -1
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.IP \(bu 2.3
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.\}
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\fIhprof\fRコマンドを使用します。HPROF: Heap/CPUプロファイリング・ツール
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(http://docs\&.oracle\&.com/javase/8/docs/technotes/samples/hprof\&.html)を参照してください
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.RE
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.SH "オプション"
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.PP
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\-stack false|true
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.RS 4
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オブジェクト割当呼出しスタックの追跡を無効にします。ヒープ・ダンプ内で割当サイト情報が使用できない場合、このフラグを\fIfalse\fRに設定する必要があります。デフォルトは\fItrue\fRです。
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.RE
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.PP
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\-refs false|true
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.RS 4
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オブジェクトへの参照の追跡を無効にします。デフォルトは\fItrue\fRです。デフォルトでは、ヒープ内のすべてのオブジェクトについて、バックポインタ(指定されたオブジェクトをポイントしているオブジェクト。参照者または受信参照とも呼ばれる)が計算されます。
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.RE
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.PP
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\-port \fIport\-number\fR
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.RS 4
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\fIjhat\fRのHTTPサーバーのポートを設定します。デフォルトは7000です。
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.RE
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.PP
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\-exclude \fIexclude\-file\fR
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.RS 4
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到達可能なオブジェクトの問合せから除外する必要があるデータ・メンバーの一覧を含むファイルを指定します。たとえば、このファイルに\fIjava\&.lang\&.String\&.value\fRが含まれていた場合、特定のオブジェクト\fIo\fRから到達可能なオブジェクトのリストを計算する際に、\fIjava\&.lang\&.String\&.value\fRフィールドに関連する参照パスが考慮されなくなります。
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.RE
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mfang
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.PP
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\-baseline \fIexclude\-file\fR
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.RS 4
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ベースラインとなるヒープ・ダンプを指定します。両方のヒープ・ダンプ内で同じオブジェクトIDを持つオブジェクトは新規ではないとしてマークされます。他のオブジェクトは新規としてマークされます。これは、異なる2つのヒープ・ダンプを比較する際に役立ちます。
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.RE
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.PP
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\-debug \fIint\fR
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.RS 4
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このツールのデバッグ・レベルを設定します。レベル0はデバッグ出力がないことを意味します。より大きな値を設定すると、より冗長なモードになります。
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.RE
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.PP
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\-version
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.RS 4
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リリース番号をレポートして終了します
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.RE
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.PP
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\-h
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.RS 4
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ヘルプ・メッセージを表示して終了します。
2
90ce3da70b43 Initial load
duke
parents:
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.RE
23600
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.PP
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\-help
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.RS 4
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ヘルプ・メッセージを表示して終了します。
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.RE
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.PP
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\-J\fIflag\fR
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.RS 4
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\fIjhat\fRコマンドを実行しているJava仮想マシンに\fIflag\fRを渡します。たとえば、512Mバイトの最大ヒープ・サイズを使用するには、\fI\-J\-Xmx512m\fRとします。
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.RE
9352
cabba0c0f3ee 7025070: man page localization broken in jdk7
ogino
parents: 5865
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.SH "関連項目"
23600
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.sp
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.RS 4
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.ie n \{\
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\h'-04'\(bu\h'+03'\c
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.\}
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.el \{\
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.sp -1
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.IP \(bu 2.3
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.\}
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jmap(1)
2692
345bc8d65b19 6837214: Update JDK7 man pages
tbell
parents: 2
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.RE
23600
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parents: 9566
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.sp
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parents: 9566
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.RS 4
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parents: 9566
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.ie n \{\
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\h'-04'\(bu\h'+03'\c
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.\}
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.el \{\
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.sp -1
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.IP \(bu 2.3
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.\}
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jconsole(1)
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.RE
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.sp
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parents: 9566
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.RS 4
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parents: 9566
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.ie n \{\
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\h'-04'\(bu\h'+03'\c
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.\}
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.el \{\
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.sp -1
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.IP \(bu 2.3
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.\}
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HPROF: Heap/CPUプロファイリング・ツール
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(http://docs\&.oracle\&.com/javase/8/docs/technotes/samples/hprof\&.html)
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.RE
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parents: 9566
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   212
.br
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'pl 8.5i
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'bp