| changeset 2692 | 345bc8d65b19 |
| parent 2 | 90ce3da70b43 |
| child 5506 | 202f599c92aa |
| 2691:bad7bbf42755 | 2692:345bc8d65b19 |
|---|---|
1 .'" t |
1 ." Copyright 2003 Sun Microsystems, Inc. All Rights Reserved. |
2 ." |
|
3 ." Copyright 2004-2006 Sun Microsystems, Inc. All Rights Reserved. |
|
4 ." DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
2 ." DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
5 ." |
3 ." |
6 ." This code is free software; you can redistribute it and/or modify it |
4 ." This code is free software; you can redistribute it and/or modify it |
7 ." under the terms of the GNU General Public License version 2 only, as |
5 ." under the terms of the GNU General Public License version 2 only, as |
8 ." published by the Free Software Foundation. |
6 ." published by the Free Software Foundation. |
19 ." |
17 ." |
20 ." Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
18 ." Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
21 ." CA 95054 USA or visit www.sun.com if you need additional information or |
19 ." CA 95054 USA or visit www.sun.com if you need additional information or |
22 ." have any questions. |
20 ." have any questions. |
23 ." |
21 ." |
24 ." ` |
22 .TH jstat 1 "04 May 2009" |
25 .TH jstat 1 "06 Aug 2006" |
23 ." Generated from HTML by html2man (author: Eric Armstrong) |
26 ." Generated by html2man |
24 |
27 .SH NAME |
25 .LP |
26 .SH "Name" |
|
28 jstat \- Java Virtual Machine Statistics Monitoring Tool |
27 jstat \- Java Virtual Machine Statistics Monitoring Tool |
28 .LP |
|
29 .SH "SYNOPSIS" |
29 .SH "SYNOPSIS" |
30 .LP |
|
31 |
|
32 .LP |
|
30 .nf |
33 .nf |
31 \f3jstat\fP [ \f2generalOption\fP | \f2outputOptions\fP\f2vmid\fP [\f2interval\fP[s|ms] [\f2count\fP]] ] |
34 \f3 |
35 .fl |
|
36 \fP\f3jstat\fP [ \f2generalOption\fP | \f2outputOptions\fP \f2vmid\fP [\f2interval\fP[s|ms] [\f2count\fP]] ] |
|
32 .fl |
37 .fl |
33 .fi |
38 .fi |
39 |
|
40 .LP |
|
34 .SH "PARAMETERS" |
41 .SH "PARAMETERS" |
42 .LP |
|
43 |
|
44 .LP |
|
45 .RS 3 |
|
35 .TP 3 |
46 .TP 3 |
36 generalOption |
47 generalOption |
37 A single general command\-line option (\-help, \-options, or \-version) |
48 A single general command\-line option (\-help, \-options, or \-version) |
38 .TP 3 |
49 .TP 3 |
39 outputOptions |
50 outputOptions |
40 One or more output options, consisting of a single \f2statOption\fP, plus any of the \-t, \-h, and \-J options. |
51 One or more output options, consisting of a single \f2statOption\fP, plus any of the \-t, \-h, and \-J options. |
41 .TP 3 |
52 .TP 3 |
42 vmid |
53 vmid |
43 Virtual machine identifier, a string indicating the target Java virtual machine (JVM). The general syntax is |
54 Virtual machine identifier, a string indicating the target Java virtual machine (JVM). The general syntax is |
44 .nf |
55 .nf |
45 \f3 |
56 \f3 |
46 .fl |
57 .fl |
47 [\fP\f4protocol\fP\f3:][//]\fP\f4lvmid\fP[@\f2hostname\fP[:\f2port\fP]/\f2servername\fP] |
58 [\fP\f4protocol\fP\f3:][//]\fP\f4lvmid\fP[@\f2hostname\fP[:\f2port\fP]/\f2servername\fP] |
48 .fl |
59 .fl |
49 .fi |
60 .fi |
50 The syntax of the vmid string largely corresponds to the syntax of a URI. The \f2vmid\fP can vary from a simple integer representing a local JVM to a more complex construction specifying a communications protocol, port number, and other implementation\-specific values. See Virtual Machine Identifier for details. |
61 The syntax of the vmid string largely corresponds to the syntax of a URI. The \f2vmid\fP can vary from a simple integer representing a local JVM to a more complex construction specifying a communications protocol, port number, and other implementation\-specific values. See Virtual Machine Identifier for details. |
51 .TP 3 |
62 .TP 3 |
52 interval[s|ms] |
63 interval[s|ms] |
53 Sampling interval in the specified units, seconds (s) or milliseconds (ms). Default units are milliseconds.\ Must be a positive integer.\ If specified, \f3jstat\fP will produce its output at each interval. |
64 Sampling interval in the specified units, seconds (s) or milliseconds (ms). Default units are milliseconds.\ Must be a positive integer.\ If specified, \f3jstat\fP will produce its output at each interval. |
54 .TP 3 |
65 .TP 3 |
55 count |
66 count |
56 Number of samples to display. Default value is infinity; that is, \f3jstat\fP displays statistics until the target JVM terminates or the \f3jstat\fP command is terminated.\ Must be a positive integer. |
67 Number of samples to display. Default value is infinity; that is, \f3jstat\fP displays statistics until the target JVM terminates or the \f3jstat\fP command is terminated.\ Must be a positive integer. |
68 .RE |
|
69 |
|
70 .LP |
|
57 .SH "DESCRIPTION" |
71 .SH "DESCRIPTION" |
58 .LP |
72 .LP |
73 |
|
74 .LP |
|
75 .LP |
|
59 The \f3jstat\fP tool displays performance statistics for an instrumented HotSpot Java virtual machine (JVM). The target JVM is identified by its virtual machine identifier, or \f2vmid\fP option described below. |
76 The \f3jstat\fP tool displays performance statistics for an instrumented HotSpot Java virtual machine (JVM). The target JVM is identified by its virtual machine identifier, or \f2vmid\fP option described below. |
60 .LP |
77 .LP |
78 .LP |
|
61 \f3NOTE\fP: This utility is unsupported and may not be available in future versions of the JDK. It is not currently available on Windows 98 and Windows ME. platforms. |
79 \f3NOTE\fP: This utility is unsupported and may not be available in future versions of the JDK. It is not currently available on Windows 98 and Windows ME. platforms. |
62 .br |
80 .br |
81 |
|
82 .LP |
|
63 .SS |
83 .SS |
64 VIRTUAL MACHINE IDENTIFIER |
84 VIRTUAL MACHINE IDENTIFIER |
65 .LP |
85 .LP |
86 .RS 3 |
|
87 |
|
88 .LP |
|
89 .LP |
|
66 The syntax of the \f2vmid\fP string largely corresponds to the syntax of a URI: |
90 The syntax of the \f2vmid\fP string largely corresponds to the syntax of a URI: |
91 .LP |
|
67 .nf |
92 .nf |
68 \f3 |
93 \f3 |
69 .fl |
94 .fl |
70 [\fP\f4protocol\fP\f3:][//]\fP\f4lvmid\fP[@\f2hostname\fP][:\f2port\fP][/\f2servername\fP] |
95 [\fP\f4protocol\fP\f3:][//]\fP\f4lvmid\fP[@\f2hostname\fP][:\f2port\fP][/\f2servername\fP] |
71 .fl |
96 .fl |
72 .fi |
97 .fi |
98 |
|
99 .LP |
|
100 .RS 3 |
|
73 .TP 3 |
101 .TP 3 |
74 protocol |
102 protocol |
75 The communications protocol. If the \f2protocol\fP is omitted and a \f2hostname\fP is not specified, the default protocol is a platform specific optimized local protocol. If the \f2protocol\fP is omitted and a \f2hostname\fP is specified, then the default protocol is \f3rmi\fP. |
103 The communications protocol. If the \f2protocol\fP is omitted and a \f2hostname\fP is not specified, the default protocol is a platform specific optimized local protocol. If the \f2protocol\fP is omitted and a \f2hostname\fP is specified, then the default protocol is \f3rmi\fP. |
76 .TP 3 |
104 .TP 3 |
77 lvmid |
105 lvmid |
78 The local virtual machine identifier for the target JVM. The \f2lvmid\fP is a platform\-specific value that uniquely identifies a JVM on a system. The \f2lvmid\fP is the only required component of a virtual machine identifier. The \f2lvmid\fP is typically, but not necessarily, the operating system's process identifier for the target JVM process. You can use the \f3jps\fP command to determine the \f2lvmid\fP. Also, you can determine \f2lvmid\fP on Unix platforms with the \f3ps\fP command, and on Windows with the Windows Task Manager. |
106 The local virtual machine identifier for the target JVM. The \f2lvmid\fP is a platform\-specific value that uniquely identifies a JVM on a system. The \f2lvmid\fP is the only required component of a virtual machine identifier. The \f2lvmid\fP is typically, but not necessarily, the operating system's process identifier for the target JVM process. You can use the jps(1) command to determine the \f2lvmid\fP. Also, you can determine \f2lvmid\fP on Unix platforms with the \f3ps\fP command, and on Windows with the Windows Task Manager. |
79 .TP 3 |
107 .TP 3 |
80 hostname |
108 hostname |
81 A hostname or IP address indicating the target host. If \f2hostname\fP is omitted, then the target host is the local host. |
109 A hostname or IP address indicating the target host. If \f2hostname\fP is omitted, then the target host is the local host. |
82 .TP 3 |
110 .TP 3 |
83 port |
111 port |
84 The default port for communicating with the remote server. If the \f2hostname\fP is omitted or the \f2protocol\fP specifies an optimized, local protocol, then \f2port\fP is ignored. Otherwise, treatment of the \f2port\fP parameter is implementation specific. For the default \f3rmi\fP protocol, the \f2port\fP indicates the port number for the rmiregistry on the remote host. If \f2port\fP is omitted, and \f2protocol\fP indicates \f3rmi\fP, then the default rmiregistry port (1099) is used. |
112 The default port for communicating with the remote server. If the \f2hostname\fP is omitted or the \f2protocol\fP specifies an optimized, local protocol, then \f2port\fP is ignored. Otherwise, treatment of the \f2port\fP parameter is implementation specific. For the default \f3rmi\fP protocol, the \f2port\fP indicates the port number for the rmiregistry on the remote host. If \f2port\fP is omitted, and \f2protocol\fP indicates \f3rmi\fP, then the default rmiregistry port (1099) is used. |
85 .TP 3 |
113 .TP 3 |
86 servername |
114 servername |
87 The treatment of this parameter depends on implementation. For the optimized local protocol, this field is ignored. For the \f3rmi\fP protocol, it represents the name of the RMI remote object on the remote host. |
115 The treatment of this parameter depends on implementation. For the optimized local protocol, this field is ignored. For the \f3rmi\fP protocol, it represents the name of the RMI remote object on the remote host. |
116 .RE |
|
117 |
|
118 .LP |
|
119 .RE |
|
88 .SH "OPTIONS" |
120 .SH "OPTIONS" |
89 .LP |
121 .LP |
122 |
|
123 .LP |
|
124 .LP |
|
90 The \f3jstat\fP command supports two types of options, general options and output options. General options cause \f3jstat\fP to display simple usage and version information. Output options determine the content and format of the statistical output. |
125 The \f3jstat\fP command supports two types of options, general options and output options. General options cause \f3jstat\fP to display simple usage and version information. Output options determine the content and format of the statistical output. |
91 .br |
126 .br |
127 |
|
128 .LP |
|
92 .LP |
129 .LP |
93 \f3NOTE\fP: All options, and their functionality are subject to change or removal in future releases. |
130 \f3NOTE\fP: All options, and their functionality are subject to change or removal in future releases. |
131 .LP |
|
94 .SS |
132 .SS |
95 GENERAL |
133 GENERAL OPTIONS |
96 OPTIONS |
134 .LP |
97 .LP |
135 .LP |
98 If you specify one of the general options, you cannot specify any other option or parameter. |
136 If you specify one of the general options, you cannot specify any other option or parameter. |
137 .LP |
|
138 .RS 3 |
|
99 .TP 3 |
139 .TP 3 |
100 \-help |
140 \-help |
101 Display help message. |
141 Display help message. |
102 .TP 3 |
142 .TP 3 |
103 \-version |
143 \-version |
104 Display version information. |
144 Display version information. |
105 .TP 3 |
145 .TP 3 |
106 \-options |
146 \-options |
107 Display list of statistics options. See the Output Options section below. |
147 Display list of statistics options. See the Output Options section below. |
148 .RE |
|
149 |
|
150 .LP |
|
108 .SS |
151 .SS |
109 OUTPUT |
152 OUTPUT OPTIONS |
110 OPTIONS |
153 .LP |
154 .RS 3 |
|
155 |
|
156 .LP |
|
111 .LP |
157 .LP |
112 If you do not specify a general option, then you can specify output options. Output options determine the content and format of \f3jstat\fP's output, and consist of a single \f2statOption\fP, plus any of the other output options (\-h, \-t, and \-J).\ The \f2statOption\fP must come first. |
158 If you do not specify a general option, then you can specify output options. Output options determine the content and format of \f3jstat\fP's output, and consist of a single \f2statOption\fP, plus any of the other output options (\-h, \-t, and \-J).\ The \f2statOption\fP must come first. |
113 .LP |
159 .LP |
160 .LP |
|
114 Output is formatted as a table, with columns are separated by spaces. A header row with titles describes the columns.\ Use the \f3\-h\fP option to set the frequency at which the header is displayed.\ Column header names are generally consistent between the different options. In general, if two options provide a column with the same name, then the data source for the two columns are the same. |
161 Output is formatted as a table, with columns are separated by spaces. A header row with titles describes the columns.\ Use the \f3\-h\fP option to set the frequency at which the header is displayed.\ Column header names are generally consistent between the different options. In general, if two options provide a column with the same name, then the data source for the two columns are the same. |
115 .LP |
162 .LP |
163 .LP |
|
116 Use the \f3\-t\fP option to display a time stamp column, labeled \f2Timestamp\fP as the first column of output. The \f2Timestamp\fP column contains the elapsed time, in seconds, since startup of the target JVM. The resolution of the time stamp is dependent on various factors and is subject to variation due to delayed thread scheduling on heavily loaded systems. |
164 Use the \f3\-t\fP option to display a time stamp column, labeled \f2Timestamp\fP as the first column of output. The \f2Timestamp\fP column contains the elapsed time, in seconds, since startup of the target JVM. The resolution of the time stamp is dependent on various factors and is subject to variation due to delayed thread scheduling on heavily loaded systems. |
117 .LP |
165 .LP |
166 .LP |
|
118 Use the \f2interval\fP and \f2count\fP parameters to determine how frequently and how many times, respectively, \f3jstat\fP displays its output. |
167 Use the \f2interval\fP and \f2count\fP parameters to determine how frequently and how many times, respectively, \f3jstat\fP displays its output. |
119 .LP |
168 .LP |
169 .LP |
|
120 \f3NOTE\fP: You are advised not to write scripts to parse \f3jstat's\fP output since the format may change in future releases. If you choose to write scripts that parse \f3jstat\fP output, expect to modify them for future releases of this tool. |
170 \f3NOTE\fP: You are advised not to write scripts to parse \f3jstat's\fP output since the format may change in future releases. If you choose to write scripts that parse \f3jstat\fP output, expect to modify them for future releases of this tool. |
171 .LP |
|
172 .RS 3 |
|
121 .TP 3 |
173 .TP 3 |
122 \-statOption |
174 \-statOption |
123 Determines the statistics information that \f3jstat\fP displays. The following table lists the available options.\ Use the \f3\-options\fP general option to display the list of options for a particular platform installation. |
175 Determines the statistics information that \f3jstat\fP displays. The following table lists the available options.\ Use the \f3\-options\fP general option to display the list of options for a particular platform installation. |
124 .br |
176 .br |
125 .br |
177 .br |
178 .LP |
|
126 .TS |
179 .TS |
127 .if \n+(b.=1 .nr d. \n(.c-\n(c.-1 |
180 .if \n+(b.=1 .nr d. \n(.c-\n(c.-1 |
128 .de 35 |
181 .de 35 |
129 .ps \n(.s |
182 .ps \n(.s |
130 .vs \n(.vu |
183 .vs \n(.vu |
403 .nr 40 \n(79+(0*\n(38) |
456 .nr 40 \n(79+(0*\n(38) |
404 .nr 80 +\n(40 |
457 .nr 80 +\n(40 |
405 .nr 41 \n(80+(3*\n(38) |
458 .nr 41 \n(80+(3*\n(38) |
406 .nr 81 +\n(41 |
459 .nr 81 +\n(41 |
407 .nr TW \n(81 |
460 .nr TW \n(81 |
408 .if t .if \n(TW>\n(.li .tm Table at line 158 file Input is too wide - \n(TW units |
461 .if t .if \n(TW>\n(.li .tm Table at line 231 file Input is too wide - \n(TW units |
409 .fc |
462 .fc |
410 .nr #T 0-1 |
463 .nr #T 0-1 |
411 .nr #a 0-1 |
464 .nr #a 0-1 |
412 .eo |
465 .eo |
413 .de T# |
466 .de T# |
632 .rm k+ |
685 .rm k+ |
633 .rm l+ |
686 .rm l+ |
634 .TE |
687 .TE |
635 .if \n-(b.=0 .nr c. \n(.c-\n(d.-52 |
688 .if \n-(b.=0 .nr c. \n(.c-\n(d.-52 |
636 .TP 3 |
689 .TP 3 |
637 \-hn |
690 \-h n |
638 Display a column header every \f2n\fP samples (output rows), where \f2n\fP is a positive integer. Default value is 0, which displays the column header above the first row of data. |
691 Display a column header every \f2n\fP samples (output rows), where \f2n\fP is a positive integer. Default value is 0, which displays the column header above the first row of data. |
639 .TP 3 |
692 .TP 3 |
640 \-tn |
693 \-t n |
641 Display a timestamp column as the first column of output. The timestamp is the the time since the start time of the target JVM. |
694 Display a timestamp column as the first column of output. The timestamp is the time since the start time of the target JVM. |
642 .TP 3 |
695 .TP 3 |
643 \-JjavaOption |
696 \-JjavaOption |
644 Pass \f2javaOption\fP to the \f3java\fP application launcher. For example, \f3\-J\-Xms48m\fP sets the startup memory to 48 megabytes. For a complete list of options, see the following documents: |
697 Pass \f2javaOption\fP to the \f3java\fP application launcher. For example, \f3\-J\-Xms48m\fP sets the startup memory to 48 megabytes. For a complete list of options, see java(1) |
645 .RS 3 |
698 .RE |
646 .TP 2 |
699 |
647 * |
700 .LP |
648 .na |
|
649 \f2java \- the Java application launcher (Solaris)\fP @ |
|
650 .fi |
|
651 http://java.sun.com/javase/6/docs/technotes/tools/solaris/java.html |
|
652 .TP 2 |
|
653 * |
|
654 .na |
|
655 \f2java \- the Java application launcher (Linux)\fP @ |
|
656 .fi |
|
657 http://java.sun.com/javase/6/docs/technotes/tools/linux/java.html |
|
658 .TP 2 |
|
659 * |
|
660 java \- the Java application launcher (Windows) |
|
661 .RE |
701 .RE |
662 .SS |
702 .SS |
663 STATOPTIONS AND |
703 STATOPTIONS AND OUTPUT |
664 OUTPUT |
704 .LP |
705 .RS 3 |
|
706 |
|
707 .LP |
|
665 .LP |
708 .LP |
666 The following tables summarize the columns that \f3jstat\fP outputs for each \f2statOption\fP. |
709 The following tables summarize the columns that \f3jstat\fP outputs for each \f2statOption\fP. |
667 .br |
710 .br |
711 |
|
712 .LP |
|
668 .SS |
713 .SS |
669 \-class Option |
714 \-class Option |
715 .LP |
|
716 .LP |
|
670 .TS |
717 .TS |
671 .if \n+(b.=1 .nr d. \n(.c-\n(c.-1 |
718 .if \n+(b.=1 .nr d. \n(.c-\n(c.-1 |
672 .de 35 |
719 .de 35 |
673 .ps \n(.s |
720 .ps \n(.s |
674 .vs \n(.vu |
721 .vs \n(.vu |
777 .nr 40 \n(79+(0*\n(38) |
824 .nr 40 \n(79+(0*\n(38) |
778 .nr 80 +\n(40 |
825 .nr 80 +\n(40 |
779 .nr 41 \n(80+(3*\n(38) |
826 .nr 41 \n(80+(3*\n(38) |
780 .nr 81 +\n(41 |
827 .nr 81 +\n(41 |
781 .nr TW \n(81 |
828 .nr TW \n(81 |
782 .if t .if \n(TW>\n(.li .tm Table at line 214 file Input is too wide - \n(TW units |
829 .if t .if \n(TW>\n(.li .tm Table at line 281 file Input is too wide - \n(TW units |
783 .fc |
830 .fc |
784 .nr #T 0-1 |
831 .nr #T 0-1 |
785 .nr #a 0-1 |
832 .nr #a 0-1 |
786 .eo |
833 .eo |
787 .de T# |
834 .de T# |
864 .rm a+ |
911 .rm a+ |
865 .rm b+ |
912 .rm b+ |
866 .rm c+ |
913 .rm c+ |
867 .TE |
914 .TE |
868 .if \n-(b.=0 .nr c. \n(.c-\n(d.-21 |
915 .if \n-(b.=0 .nr c. \n(.c-\n(d.-21 |
916 |
|
917 .LP |
|
869 .SS |
918 .SS |
870 \-compiler |
919 \-compiler Option |
871 Option |
920 .LP |
921 .LP |
|
872 .TS |
922 .TS |
873 .if \n+(b.=1 .nr d. \n(.c-\n(c.-1 |
923 .if \n+(b.=1 .nr d. \n(.c-\n(c.-1 |
874 .de 35 |
924 .de 35 |
875 .ps \n(.s |
925 .ps \n(.s |
876 .vs \n(.vu |
926 .vs \n(.vu |
1031 .nr 40 \n(79+(0*\n(38) |
1081 .nr 40 \n(79+(0*\n(38) |
1032 .nr 80 +\n(40 |
1082 .nr 80 +\n(40 |
1033 .nr 41 \n(80+(3*\n(38) |
1083 .nr 41 \n(80+(3*\n(38) |
1034 .nr 81 +\n(41 |
1084 .nr 81 +\n(41 |
1035 .nr TW \n(81 |
1085 .nr TW \n(81 |
1036 .if t .if \n(TW>\n(.li .tm Table at line 247 file Input is too wide - \n(TW units |
1086 .if t .if \n(TW>\n(.li .tm Table at line 317 file Input is too wide - \n(TW units |
1037 .fc |
1087 .fc |
1038 .nr #T 0-1 |
1088 .nr #T 0-1 |
1039 .nr #a 0-1 |
1089 .nr #a 0-1 |
1040 .eo |
1090 .eo |
1041 .de T# |
1091 .de T# |
1161 .rm d+ |
1211 .rm d+ |
1162 .rm e+ |
1212 .rm e+ |
1163 .rm f+ |
1213 .rm f+ |
1164 .TE |
1214 .TE |
1165 .if \n-(b.=0 .nr c. \n(.c-\n(d.-29 |
1215 .if \n-(b.=0 .nr c. \n(.c-\n(d.-29 |
1216 |
|
1217 .LP |
|
1166 .SS |
1218 .SS |
1167 \-gc Option |
1219 \-gc Option |
1220 .LP |
|
1221 .LP |
|
1168 .TS |
1222 .TS |
1169 .if \n+(b.=1 .nr d. \n(.c-\n(c.-1 |
1223 .if \n+(b.=1 .nr d. \n(.c-\n(c.-1 |
1170 .de 35 |
1224 .de 35 |
1171 .ps \n(.s |
1225 .ps \n(.s |
1172 .vs \n(.vu |
1226 .vs \n(.vu |
1491 .nr 40 \n(79+(0*\n(38) |
1545 .nr 40 \n(79+(0*\n(38) |
1492 .nr 80 +\n(40 |
1546 .nr 80 +\n(40 |
1493 .nr 41 \n(80+(3*\n(38) |
1547 .nr 41 \n(80+(3*\n(38) |
1494 .nr 81 +\n(41 |
1548 .nr 81 +\n(41 |
1495 .nr TW \n(81 |
1549 .nr TW \n(81 |
1496 .if t .if \n(TW>\n(.li .tm Table at line 313 file Input is too wide - \n(TW units |
1550 .if t .if \n(TW>\n(.li .tm Table at line 387 file Input is too wide - \n(TW units |
1497 .fc |
1551 .fc |
1498 .nr #T 0-1 |
1552 .nr #T 0-1 |
1499 .nr #a 0-1 |
1553 .nr #a 0-1 |
1500 .eo |
1554 .eo |
1501 .de T# |
1555 .de T# |
1761 .rm l+ |
1815 .rm l+ |
1762 .rm m+ |
1816 .rm m+ |
1763 .rm n+ |
1817 .rm n+ |
1764 .TE |
1818 .TE |
1765 .if \n-(b.=0 .nr c. \n(.c-\n(d.-63 |
1819 .if \n-(b.=0 .nr c. \n(.c-\n(d.-63 |
1820 |
|
1821 .LP |
|
1766 .SS |
1822 .SS |
1767 \-gccapacity Option |
1823 \-gccapacity Option |
1824 .LP |
|
1825 .LP |
|
1768 .TS |
1826 .TS |
1769 .if \n+(b.=1 .nr d. \n(.c-\n(c.-1 |
1827 .if \n+(b.=1 .nr d. \n(.c-\n(c.-1 |
1770 .de 35 |
1828 .de 35 |
1771 .ps \n(.s |
1829 .ps \n(.s |
1772 .vs \n(.vu |
1830 .vs \n(.vu |
2111 .nr 40 \n(79+(0*\n(38) |
2169 .nr 40 \n(79+(0*\n(38) |
2112 .nr 80 +\n(40 |
2170 .nr 80 +\n(40 |
2113 .nr 41 \n(80+(3*\n(38) |
2171 .nr 41 \n(80+(3*\n(38) |
2114 .nr 81 +\n(41 |
2172 .nr 81 +\n(41 |
2115 .nr TW \n(81 |
2173 .nr TW \n(81 |
2116 .if t .if \n(TW>\n(.li .tm Table at line 383 file Input is too wide - \n(TW units |
2174 .if t .if \n(TW>\n(.li .tm Table at line 461 file Input is too wide - \n(TW units |
2117 .fc |
2175 .fc |
2118 .nr #T 0-1 |
2176 .nr #T 0-1 |
2119 .nr #a 0-1 |
2177 .nr #a 0-1 |
2120 .eo |
2178 .eo |
2121 .de T# |
2179 .de T# |
2398 .rm m+ |
2456 .rm m+ |
2399 .rm n+ |
2457 .rm n+ |
2400 .rm o+ |
2458 .rm o+ |
2401 .TE |
2459 .TE |
2402 .if \n-(b.=0 .nr c. \n(.c-\n(d.-67 |
2460 .if \n-(b.=0 .nr c. \n(.c-\n(d.-67 |
2461 |
|
2462 .LP |
|
2403 .SS |
2463 .SS |
2404 \-gccause |
2464 \-gccause Option |
2405 Option |
2465 .LP |
2406 .LP |
2466 .LP |
2407 This option displays the same summary of garbage collection statistics as the \f3\-gcutil\fP option, but includes the causes of the last garbage collection event and (if applicable) the current garbage collection event. In addition to the columns listed for \f3\-gcutil\fP, this option adds the following columns: |
2467 This option displays the same summary of garbage collection statistics as the \f3\-gcutil\fP option, but includes the causes of the last garbage collection event and (if applicable) the current garbage collection event. In addition to the columns listed for \f3\-gcutil\fP, this option adds the following columns: |
2468 .LP |
|
2469 .LP |
|
2408 .TS |
2470 .TS |
2409 .if \n+(b.=1 .nr d. \n(.c-\n(c.-1 |
2471 .if \n+(b.=1 .nr d. \n(.c-\n(c.-1 |
2410 .de 35 |
2472 .de 35 |
2411 .ps \n(.s |
2473 .ps \n(.s |
2412 .vs \n(.vu |
2474 .vs \n(.vu |
2487 .nr 40 \n(79+(0*\n(38) |
2549 .nr 40 \n(79+(0*\n(38) |
2488 .nr 80 +\n(40 |
2550 .nr 80 +\n(40 |
2489 .nr 41 \n(80+(3*\n(38) |
2551 .nr 41 \n(80+(3*\n(38) |
2490 .nr 81 +\n(41 |
2552 .nr 81 +\n(41 |
2491 .nr TW \n(81 |
2553 .nr TW \n(81 |
2492 .if t .if \n(TW>\n(.li .tm Table at line 402 file Input is too wide - \n(TW units |
2554 .if t .if \n(TW>\n(.li .tm Table at line 484 file Input is too wide - \n(TW units |
2493 .fc |
2555 .fc |
2494 .nr #T 0-1 |
2556 .nr #T 0-1 |
2495 .nr #a 0-1 |
2557 .nr #a 0-1 |
2496 .eo |
2558 .eo |
2497 .de T# |
2559 .de T# |
2549 .35 |
2611 .35 |
2550 .rm a+ |
2612 .rm a+ |
2551 .rm b+ |
2613 .rm b+ |
2552 .TE |
2614 .TE |
2553 .if \n-(b.=0 .nr c. \n(.c-\n(d.-13 |
2615 .if \n-(b.=0 .nr c. \n(.c-\n(d.-13 |
2616 |
|
2617 .LP |
|
2554 .SS |
2618 .SS |
2555 \-gcnew Option |
2619 \-gcnew Option |
2620 .LP |
|
2621 .LP |
|
2556 .TS |
2622 .TS |
2557 .if \n+(b.=1 .nr d. \n(.c-\n(c.-1 |
2623 .if \n+(b.=1 .nr d. \n(.c-\n(c.-1 |
2558 .de 35 |
2624 .de 35 |
2559 .ps \n(.s |
2625 .ps \n(.s |
2560 .vs \n(.vu |
2626 .vs \n(.vu |
2799 .nr 40 \n(79+(0*\n(38) |
2865 .nr 40 \n(79+(0*\n(38) |
2800 .nr 80 +\n(40 |
2866 .nr 80 +\n(40 |
2801 .nr 41 \n(80+(3*\n(38) |
2867 .nr 41 \n(80+(3*\n(38) |
2802 .nr 81 +\n(41 |
2868 .nr 81 +\n(41 |
2803 .nr TW \n(81 |
2869 .nr TW \n(81 |
2804 .if t .if \n(TW>\n(.li .tm Table at line 452 file Input is too wide - \n(TW units |
2870 .if t .if \n(TW>\n(.li .tm Table at line 538 file Input is too wide - \n(TW units |
2805 .fc |
2871 .fc |
2806 .nr #T 0-1 |
2872 .nr #T 0-1 |
2807 .nr #a 0-1 |
2873 .nr #a 0-1 |
2808 .eo |
2874 .eo |
2809 .de T# |
2875 .de T# |
3001 .rm h+ |
3067 .rm h+ |
3002 .rm i+ |
3068 .rm i+ |
3003 .rm j+ |
3069 .rm j+ |
3004 .TE |
3070 .TE |
3005 .if \n-(b.=0 .nr c. \n(.c-\n(d.-47 |
3071 .if \n-(b.=0 .nr c. \n(.c-\n(d.-47 |
3072 |
|
3073 .LP |
|
3006 .SS |
3074 .SS |
3007 \-gcnewcapacity Option |
3075 \-gcnewcapacity Option |
3076 .LP |
|
3077 .LP |
|
3008 .TS |
3078 .TS |
3009 .if \n+(b.=1 .nr d. \n(.c-\n(c.-1 |
3079 .if \n+(b.=1 .nr d. \n(.c-\n(c.-1 |
3010 .de 35 |
3080 .de 35 |
3011 .ps \n(.s |
3081 .ps \n(.s |
3012 .vs \n(.vu |
3082 .vs \n(.vu |
3250 .nr 40 \n(79+(0*\n(38) |
3320 .nr 40 \n(79+(0*\n(38) |
3251 .nr 80 +\n(40 |
3321 .nr 80 +\n(40 |
3252 .nr 41 \n(80+(3*\n(38) |
3322 .nr 41 \n(80+(3*\n(38) |
3253 .nr 81 +\n(41 |
3323 .nr 81 +\n(41 |
3254 .nr TW \n(81 |
3324 .nr TW \n(81 |
3255 .if t .if \n(TW>\n(.li .tm Table at line 504 file Input is too wide - \n(TW units |
3325 .if t .if \n(TW>\n(.li .tm Table at line 594 file Input is too wide - \n(TW units |
3256 .fc |
3326 .fc |
3257 .nr #T 0-1 |
3327 .nr #T 0-1 |
3258 .nr #a 0-1 |
3328 .nr #a 0-1 |
3259 .eo |
3329 .eo |
3260 .de T# |
3330 .de T# |
3452 .rm h+ |
3522 .rm h+ |
3453 .rm i+ |
3523 .rm i+ |
3454 .rm j+ |
3524 .rm j+ |
3455 .TE |
3525 .TE |
3456 .if \n-(b.=0 .nr c. \n(.c-\n(d.-49 |
3526 .if \n-(b.=0 .nr c. \n(.c-\n(d.-49 |
3527 |
|
3528 .LP |
|
3457 .SS |
3529 .SS |
3458 \-gcold Option |
3530 \-gcold Option |
3531 .LP |
|
3532 .LP |
|
3459 .TS |
3533 .TS |
3460 .if \n+(b.=1 .nr d. \n(.c-\n(c.-1 |
3534 .if \n+(b.=1 .nr d. \n(.c-\n(c.-1 |
3461 .de 35 |
3535 .de 35 |
3462 .ps \n(.s |
3536 .ps \n(.s |
3463 .vs \n(.vu |
3537 .vs \n(.vu |
3642 .nr 40 \n(79+(0*\n(38) |
3716 .nr 40 \n(79+(0*\n(38) |
3643 .nr 80 +\n(40 |
3717 .nr 80 +\n(40 |
3644 .nr 41 \n(80+(3*\n(38) |
3718 .nr 41 \n(80+(3*\n(38) |
3645 .nr 81 +\n(41 |
3719 .nr 81 +\n(41 |
3646 .nr TW \n(81 |
3720 .nr TW \n(81 |
3647 .if t .if \n(TW>\n(.li .tm Table at line 542 file Input is too wide - \n(TW units |
3721 .if t .if \n(TW>\n(.li .tm Table at line 636 file Input is too wide - \n(TW units |
3648 .fc |
3722 .fc |
3649 .nr #T 0-1 |
3723 .nr #T 0-1 |
3650 .nr #a 0-1 |
3724 .nr #a 0-1 |
3651 .eo |
3725 .eo |
3652 .de T# |
3726 .de T# |
3793 .rm e+ |
3867 .rm e+ |
3794 .rm f+ |
3868 .rm f+ |
3795 .rm g+ |
3869 .rm g+ |
3796 .TE |
3870 .TE |
3797 .if \n-(b.=0 .nr c. \n(.c-\n(d.-35 |
3871 .if \n-(b.=0 .nr c. \n(.c-\n(d.-35 |
3872 |
|
3873 .LP |
|
3798 .SS |
3874 .SS |
3799 \-gcoldcapacity Option |
3875 \-gcoldcapacity Option |
3876 .LP |
|
3877 .LP |
|
3800 .TS |
3878 .TS |
3801 .if \n+(b.=1 .nr d. \n(.c-\n(c.-1 |
3879 .if \n+(b.=1 .nr d. \n(.c-\n(c.-1 |
3802 .de 35 |
3880 .de 35 |
3803 .ps \n(.s |
3881 .ps \n(.s |
3804 .vs \n(.vu |
3882 .vs \n(.vu |
3983 .nr 40 \n(79+(0*\n(38) |
4061 .nr 40 \n(79+(0*\n(38) |
3984 .nr 80 +\n(40 |
4062 .nr 80 +\n(40 |
3985 .nr 41 \n(80+(3*\n(38) |
4063 .nr 41 \n(80+(3*\n(38) |
3986 .nr 81 +\n(41 |
4064 .nr 81 +\n(41 |
3987 .nr TW \n(81 |
4065 .nr TW \n(81 |
3988 .if t .if \n(TW>\n(.li .tm Table at line 580 file Input is too wide - \n(TW units |
4066 .if t .if \n(TW>\n(.li .tm Table at line 678 file Input is too wide - \n(TW units |
3989 .fc |
4067 .fc |
3990 .nr #T 0-1 |
4068 .nr #T 0-1 |
3991 .nr #a 0-1 |
4069 .nr #a 0-1 |
3992 .eo |
4070 .eo |
3993 .de T# |
4071 .de T# |
4134 .rm e+ |
4212 .rm e+ |
4135 .rm f+ |
4213 .rm f+ |
4136 .rm g+ |
4214 .rm g+ |
4137 .TE |
4215 .TE |
4138 .if \n-(b.=0 .nr c. \n(.c-\n(d.-35 |
4216 .if \n-(b.=0 .nr c. \n(.c-\n(d.-35 |
4217 |
|
4218 .LP |
|
4139 .SS |
4219 .SS |
4140 \-gcpermcapacity Option |
4220 \-gcpermcapacity Option |
4221 .LP |
|
4222 .LP |
|
4141 .TS |
4223 .TS |
4142 .if \n+(b.=1 .nr d. \n(.c-\n(c.-1 |
4224 .if \n+(b.=1 .nr d. \n(.c-\n(c.-1 |
4143 .de 35 |
4225 .de 35 |
4144 .ps \n(.s |
4226 .ps \n(.s |
4145 .vs \n(.vu |
4227 .vs \n(.vu |
4324 .nr 40 \n(79+(0*\n(38) |
4406 .nr 40 \n(79+(0*\n(38) |
4325 .nr 80 +\n(40 |
4407 .nr 80 +\n(40 |
4326 .nr 41 \n(80+(3*\n(38) |
4408 .nr 41 \n(80+(3*\n(38) |
4327 .nr 81 +\n(41 |
4409 .nr 81 +\n(41 |
4328 .nr TW \n(81 |
4410 .nr TW \n(81 |
4329 .if t .if \n(TW>\n(.li .tm Table at line 618 file Input is too wide - \n(TW units |
4411 .if t .if \n(TW>\n(.li .tm Table at line 720 file Input is too wide - \n(TW units |
4330 .fc |
4412 .fc |
4331 .nr #T 0-1 |
4413 .nr #T 0-1 |
4332 .nr #a 0-1 |
4414 .nr #a 0-1 |
4333 .eo |
4415 .eo |
4334 .de T# |
4416 .de T# |
4475 .rm e+ |
4557 .rm e+ |
4476 .rm f+ |
4558 .rm f+ |
4477 .rm g+ |
4559 .rm g+ |
4478 .TE |
4560 .TE |
4479 .if \n-(b.=0 .nr c. \n(.c-\n(d.-35 |
4561 .if \n-(b.=0 .nr c. \n(.c-\n(d.-35 |
4562 |
|
4563 .LP |
|
4480 .SS |
4564 .SS |
4481 \-gcutil |
4565 \-gcutil Option |
4482 Option |
4566 .LP |
4567 .LP |
|
4483 .TS |
4568 .TS |
4484 .if \n+(b.=1 .nr d. \n(.c-\n(c.-1 |
4569 .if \n+(b.=1 .nr d. \n(.c-\n(c.-1 |
4485 .de 35 |
4570 .de 35 |
4486 .ps \n(.s |
4571 .ps \n(.s |
4487 .vs \n(.vu |
4572 .vs \n(.vu |
4706 .nr 40 \n(79+(0*\n(38) |
4791 .nr 40 \n(79+(0*\n(38) |
4707 .nr 80 +\n(40 |
4792 .nr 80 +\n(40 |
4708 .nr 41 \n(80+(3*\n(38) |
4793 .nr 41 \n(80+(3*\n(38) |
4709 .nr 81 +\n(41 |
4794 .nr 81 +\n(41 |
4710 .nr TW \n(81 |
4795 .nr TW \n(81 |
4711 .if t .if \n(TW>\n(.li .tm Table at line 665 file Input is too wide - \n(TW units |
4796 .if t .if \n(TW>\n(.li .tm Table at line 770 file Input is too wide - \n(TW units |
4712 .fc |
4797 .fc |
4713 .nr #T 0-1 |
4798 .nr #T 0-1 |
4714 .nr #a 0-1 |
4799 .nr #a 0-1 |
4715 .eo |
4800 .eo |
4716 .de T# |
4801 .de T# |
4891 .rm g+ |
4976 .rm g+ |
4892 .rm h+ |
4977 .rm h+ |
4893 .rm i+ |
4978 .rm i+ |
4894 .TE |
4979 .TE |
4895 .if \n-(b.=0 .nr c. \n(.c-\n(d.-43 |
4980 .if \n-(b.=0 .nr c. \n(.c-\n(d.-43 |
4981 |
|
4982 .LP |
|
4896 .SS |
4983 .SS |
4897 \-printcompilation Option |
4984 \-printcompilation Option |
4985 .LP |
|
4986 .LP |
|
4898 .TS |
4987 .TS |
4899 .if \n+(b.=1 .nr d. \n(.c-\n(c.-1 |
4988 .if \n+(b.=1 .nr d. \n(.c-\n(c.-1 |
4900 .de 35 |
4989 .de 35 |
4901 .ps \n(.s |
4990 .ps \n(.s |
4902 .vs \n(.vu |
4991 .vs \n(.vu |
5001 .nr 40 \n(79+(0*\n(38) |
5090 .nr 40 \n(79+(0*\n(38) |
5002 .nr 80 +\n(40 |
5091 .nr 80 +\n(40 |
5003 .nr 41 \n(80+(3*\n(38) |
5092 .nr 41 \n(80+(3*\n(38) |
5004 .nr 81 +\n(41 |
5093 .nr 81 +\n(41 |
5005 .nr TW \n(81 |
5094 .nr TW \n(81 |
5006 .if t .if \n(TW>\n(.li .tm Table at line 687 file Input is too wide - \n(TW units |
5095 .if t .if \n(TW>\n(.li .tm Table at line 796 file Input is too wide - \n(TW units |
5007 .fc |
5096 .fc |
5008 .nr #T 0-1 |
5097 .nr #T 0-1 |
5009 .nr #a 0-1 |
5098 .nr #a 0-1 |
5010 .eo |
5099 .eo |
5011 .de T# |
5100 .de T# |
5084 .rm a+ |
5173 .rm a+ |
5085 .rm b+ |
5174 .rm b+ |
5086 .rm c+ |
5175 .rm c+ |
5087 .TE |
5176 .TE |
5088 .if \n-(b.=0 .nr c. \n(.c-\n(d.-19 |
5177 .if \n-(b.=0 .nr c. \n(.c-\n(d.-19 |
5178 |
|
5179 .LP |
|
5089 .SS |
5180 .SS |
5181 |
|
5182 .LP |
|
5090 .SH "" |
5183 .SH "" |
5091 .LP |
5184 .LP |
5185 .LP |
|
5092 This section presents some examples of monitoring a local JVM with a \f2lvmid\fP of 21891. |
5186 This section presents some examples of monitoring a local JVM with a \f2lvmid\fP of 21891. |
5187 .LP |
|
5093 .SS |
5188 .SS |
5094 Using the gcutil option |
5189 Using the gcutil option |
5095 .LP |
5190 .LP |
5191 .LP |
|
5096 This example attaches to \f2lvmid\fP 21891 and takes 7 samples at 250 millisecond intervals and displays the output as specified by the \f3\-gcutil\fP option. |
5192 This example attaches to \f2lvmid\fP 21891 and takes 7 samples at 250 millisecond intervals and displays the output as specified by the \f3\-gcutil\fP option. |
5193 .LP |
|
5097 .nf |
5194 .nf |
5098 \f3jstat \-gcutil 21891 250 7\fP |
5195 \f3 |
5196 .fl |
|
5197 \fP\f3jstat \-gcutil 21891 250 7\fP |
|
5099 .br |
5198 .br |
5100 |
5199 |
5101 .fl |
5200 .fl |
5102 S0 S1 E O P YGC YGCT FGC FGCT GCT |
5201 S0 S1 E O P YGC YGCT FGC FGCT GCT |
5103 .br |
5202 .br |
5127 .br |
5226 .br |
5128 |
5227 |
5129 .fl |
5228 .fl |
5130 0.00 7.74 58.11 9.51 96.71 79 0.177 5 0.495 0.673 |
5229 0.00 7.74 58.11 9.51 96.71 79 0.177 5 0.495 0.673 |
5131 .br |
5230 .br |
5231 |
|
5232 .fl |
|
5132 .fi |
5233 .fi |
5234 |
|
5235 .LP |
|
5133 .LP |
5236 .LP |
5134 The output of this example shows that a young generation collection occurred between the 3rd and 4th sample. The collection took 0.001 seconds and promoted objects from the eden space (E) to the old space (O), resulting in an increase of old space utilization from 9.49% to 9.51%. Before the collection, the survivor space was 12.44% utilized, but after this collection it is only 7.74% utilized. |
5237 The output of this example shows that a young generation collection occurred between the 3rd and 4th sample. The collection took 0.001 seconds and promoted objects from the eden space (E) to the old space (O), resulting in an increase of old space utilization from 9.49% to 9.51%. Before the collection, the survivor space was 12.44% utilized, but after this collection it is only 7.74% utilized. |
5238 .LP |
|
5135 .SS |
5239 .SS |
5136 Repeating the column header |
5240 Repeating the column header string |
5137 string |
5241 .LP |
5138 .LP |
5242 .LP |
5139 This example attaches to \f2lvmid\fP 21891 and takes samples at 250 millisecond intervals and displays the output as specified by \f3\-gcutil\fP option. In addition, it uses the \f3\-h3\fP option to output the column header after every 3 lines of data. |
5243 This example attaches to \f2lvmid\fP 21891 and takes samples at 250 millisecond intervals and displays the output as specified by \f3\-gcutil\fP option. In addition, it uses the \f3\-h3\fP option to output the column header after every 3 lines of data. |
5244 .LP |
|
5140 .nf |
5245 .nf |
5141 \f3jstat \-gcnew \-h3 21891 250\fP |
5246 \f3 |
5247 .fl |
|
5248 \fP\f3jstat \-gcnew \-h3 21891 250\fP |
|
5142 .br |
5249 .br |
5143 |
5250 |
5144 .fl |
5251 .fl |
5145 S0C S1C S0U S1U TT MTT DSS EC EU YGC YGCT |
5252 S0C S1C S0U S1U TT MTT DSS EC EU YGC YGCT |
5146 .br |
5253 .br |
5178 .br |
5285 .br |
5179 |
5286 |
5180 .fl |
5287 .fl |
5181 64.0 64.0 0.0 19.0 31 31 32.0 512.0 306.7 251 0.204 |
5288 64.0 64.0 0.0 19.0 31 31 32.0 512.0 306.7 251 0.204 |
5182 .br |
5289 .br |
5290 |
|
5291 .fl |
|
5183 .fi |
5292 .fi |
5293 |
|
5294 .LP |
|
5184 .LP |
5295 .LP |
5185 In addition to showing the repeating header string, this example shows that between the 2nd and 3rd samples, a young GC occurred. Its duration was 0.001 seconds. The collection found enough live data that the survivor space 0 utilization (S0U) would would have exceeded the desired survivor Size (DSS). As a result, objects were promoted to the old generation (not visible in this output), and the tenuring threshold (TT) was lowered from 31 to 2. |
5296 In addition to showing the repeating header string, this example shows that between the 2nd and 3rd samples, a young GC occurred. Its duration was 0.001 seconds. The collection found enough live data that the survivor space 0 utilization (S0U) would would have exceeded the desired survivor Size (DSS). As a result, objects were promoted to the old generation (not visible in this output), and the tenuring threshold (TT) was lowered from 31 to 2. |
5186 .LP |
5297 .LP |
5298 .LP |
|
5187 Another collection occurs between the 5th and 6th samples. This collection found very few survivors and returned the tenuring threshold to 31. |
5299 Another collection occurs between the 5th and 6th samples. This collection found very few survivors and returned the tenuring threshold to 31. |
5300 .LP |
|
5188 .SS |
5301 .SS |
5189 Including a |
5302 Including a time stamp for each sample |
5190 time stamp for each sample |
5303 .LP |
5191 .LP |
5304 .LP |
5192 This example attaches to \f2lvmid\fP 21891 and takes 3 samples at 250 millisecond intervals. The \f3\-t\fP option is used to generate a time stamp for each sample in the first column. |
5305 This example attaches to \f2lvmid\fP 21891 and takes 3 samples at 250 millisecond intervals. The \f3\-t\fP option is used to generate a time stamp for each sample in the first column. |
5306 .LP |
|
5193 .nf |
5307 .nf |
5194 \f3jstat \-gcoldcapacity \-t 21891 250 3\fP |
5308 \f3 |
5309 .fl |
|
5310 \fP\f3jstat \-gcoldcapacity \-t 21891 250 3\fP |
|
5195 .br |
5311 .br |
5196 |
5312 |
5197 .fl |
5313 .fl |
5198 Timestamp OGCMN OGCMX OGC OC YGC FGC FGCT GCT |
5314 Timestamp OGCMN OGCMX OGC OC YGC FGC FGCT GCT |
5199 .br |
5315 .br |
5207 .br |
5323 .br |
5208 |
5324 |
5209 .fl |
5325 .fl |
5210 150.7 1408.0 60544.0 13820.0 13820.0 194 81 2.938 3.863 |
5326 150.7 1408.0 60544.0 13820.0 13820.0 194 81 2.938 3.863 |
5211 .br |
5327 .br |
5328 |
|
5329 .fl |
|
5212 .fi |
5330 .fi |
5331 |
|
5332 .LP |
|
5213 .LP |
5333 .LP |
5214 The \f2Timestamp\fP column reports the elapsed time in seconds since the start of the target JVM. In addition, the \f3\-gcoldcapacity\fP output shows the old generation capacity (OGC) and the old space capacity (OC) increasing as the heap expands to meet allocation and/or promotion demands. The old generation capacity (OGC) has grown to from 11696 KB to 13820 KB after the 81st Full GC (FGC). The maximum capacity of the generation (and space) is 60544 KB (OGCMX), so it still has room to expand. |
5334 The \f2Timestamp\fP column reports the elapsed time in seconds since the start of the target JVM. In addition, the \f3\-gcoldcapacity\fP output shows the old generation capacity (OGC) and the old space capacity (OC) increasing as the heap expands to meet allocation and/or promotion demands. The old generation capacity (OGC) has grown to from 11696 KB to 13820 KB after the 81st Full GC (FGC). The maximum capacity of the generation (and space) is 60544 KB (OGCMX), so it still has room to expand. |
5335 .LP |
|
5215 .SS |
5336 .SS |
5216 Monitor |
5337 Monitor instrumentation for a remote JVM |
5217 instrumentation for a remote JVM |
5338 .LP |
5218 .LP |
5339 .LP |
5219 This example attaches to \f2lvmid\fP 40496 on the system named \f2remote.domain\fP using the \f3\-gcutil\fP option, with samples taken every second indefinitely. |
5340 This example attaches to \f2lvmid\fP 40496 on the system named \f2remote.domain\fP using the \f3\-gcutil\fP option, with samples taken every second indefinitely. |
5341 .LP |
|
5220 .nf |
5342 .nf |
5221 \f3jstat \-gcutil 40496@remote.domain 1000\fP |
5343 \f3 |
5344 .fl |
|
5345 \fP\f3jstat \-gcutil 40496@remote.domain 1000\fP |
|
5222 .br |
5346 .br |
5223 |
5347 |
5224 .fl |
5348 .fl |
5225 ... \f2output omitted\fP |
5349 ... \f2output omitted\fP |
5226 .br |
5350 .br |
5351 |
|
5352 .fl |
|
5227 .fi |
5353 .fi |
5354 |
|
5355 .LP |
|
5228 .LP |
5356 .LP |
5229 The \f2lvmid\fP is combined with the name of the remote host to construct a \f2vmid\fP of \f240496@remote.domain\fP. This \f2vmid\fP results in the use of the \f3rmi\fP protocol to communicate to the default \f3jstatd\fP server on the remote host. The \f3jstatd\fP server is located using the \f3rmiregistry\fP on \f2remote.domain\fP that is bound to the default \f3rmiregistry\fP port (port 1099). |
5357 The \f2lvmid\fP is combined with the name of the remote host to construct a \f2vmid\fP of \f240496@remote.domain\fP. This \f2vmid\fP results in the use of the \f3rmi\fP protocol to communicate to the default \f3jstatd\fP server on the remote host. The \f3jstatd\fP server is located using the \f3rmiregistry\fP on \f2remote.domain\fP that is bound to the default \f3rmiregistry\fP port (port 1099). |
5358 .LP |
|
5359 .RE |
|
5230 .SH "SEE ALSO" |
5360 .SH "SEE ALSO" |
5361 .LP |
|
5231 .RS 3 |
5362 .RS 3 |
5232 .TP 2 |
5363 .TP 2 |
5233 * |
5364 o |
5234 java \- the Java Application Launcher |
5365 java(1) \- the Java Application Launcher |
5235 .TP 2 |
5366 .TP 2 |
5236 * |
5367 o |
5237 jps \- the Java Process Status Application |
5368 jps(1) \- the Java Process Status Application |
5238 .TP 2 |
5369 .TP 2 |
5239 * |
5370 o |
5240 jstatd \- the jvmstat daemon |
5371 jstatd(1) \- the jvmstat daemon |
5241 .TP 2 |
5372 .TP 2 |
5242 * |
5373 o |
5243 rmiregistry \- the Java Remote Object Registry |
5374 rmiregistry(1) \- the Java Remote Object Registry |
5244 .RE |
5375 .RE |
5376 |
|
5377 .LP |
|
5378 |
|
5379 .LP |
|
5245 |
5380 |