Created
November 14, 2011 03:54
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jmap -heap output sample. Note that MaxNewSize is in its default value (max_uintx), which means ergo should choose the actual value.
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$JAVA_HOME/bin/jmap -heap `pgrep java` | |
Attaching to process ID 2091, please wait... | |
Warning: the type "const char*" (declared in the remote VM in VMStructs::localHotSpotVMTypes) had its size declared as 8 twice. Continuing. | |
Warning: the type "const size_t" (declared in the remote VM in VMStructs::localHotSpotVMTypes) had its size declared as 8 twice. Continuing. | |
Warning: the type "const int" (declared in the remote VM in VMStructs::localHotSpotVMTypes) had its size declared as 4 twice. Continuing. | |
Warning: the type "const MemRegion" (declared in the remote VM in VMStructs::localHotSpotVMTypes) had its size declared as 16 twice. Continuing. | |
Debugger attached successfully. | |
Server compiler detected. | |
JVM version is 21.1-b02 | |
using thread-local object allocation. | |
Parallel GC with 4 thread(s) | |
Heap Configuration: | |
MinHeapFreeRatio = 40 | |
MaxHeapFreeRatio = 70 | |
MaxHeapSize = 918552576 (876.0MB) | |
NewSize = 1310720 (1.25MB) | |
MaxNewSize = 17592186044415 MB | |
OldSize = 5439488 (5.1875MB) | |
NewRatio = 2 | |
SurvivorRatio = 8 | |
PermSize = 21757952 (20.75MB) | |
MaxPermSize = 85983232 (82.0MB) | |
Heap Usage: | |
PS Young Generation | |
Eden Space: | |
capacity = 28704768 (27.375MB) | |
used = 1612880 (1.5381622314453125MB) | |
free = 27091888 (25.836837768554688MB) | |
5.618857466466895% used | |
From Space: | |
capacity = 2359296 (2.25MB) | |
used = 2326560 (2.218780517578125MB) | |
free = 32736 (0.031219482421875MB) | |
98.61246744791667% used | |
To Space: | |
capacity = 2359296 (2.25MB) | |
used = 0 (0.0MB) | |
free = 2359296 (2.25MB) | |
0.0% used | |
PS Old Generation | |
capacity = 38273024 (36.5MB) | |
used = 8778296 (8.371635437011719MB) | |
free = 29494728 (28.12836456298828MB) | |
22.935987498662243% used | |
PS Perm Generation | |
capacity = 21757952 (20.75MB) | |
used = 13077368 (12.471549987792969MB) | |
free = 8680584 (8.278450012207031MB) | |
60.10385536285768% used |
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$ jmap -heap `pgrep java` | |
Attaching to process ID 402, please wait... | |
Debugger attached successfully. | |
Server compiler detected. | |
JVM version is 20.0-b11-internal | |
using thread-local object allocation. | |
Parallel GC with 4 thread(s) | |
Heap Configuration: | |
MinHeapFreeRatio = 40 | |
MaxHeapFreeRatio = 70 | |
MaxHeapSize = 918552576 (876.0MB) | |
NewSize = 1310720 (1.25MB) | |
MaxNewSize = 17592186044415 MB | |
OldSize = 5439488 (5.1875MB) | |
NewRatio = 2 | |
SurvivorRatio = 8 | |
PermSize = 21757952 (20.75MB) | |
MaxPermSize = 85983232 (82.0MB) | |
Heap Usage: | |
PS Young Generation | |
Eden Space: | |
capacity = 28704768 (27.375MB) | |
used = 17501552 (16.690780639648438MB) | |
free = 11203216 (10.684219360351562MB) | |
60.97088818136415% used | |
From Space: | |
capacity = 2359296 (2.25MB) | |
used = 2326560 (2.218780517578125MB) | |
free = 32736 (0.031219482421875MB) | |
98.61246744791667% used | |
To Space: | |
capacity = 2359296 (2.25MB) | |
used = 0 (0.0MB) | |
free = 2359296 (2.25MB) | |
0.0% used | |
PS Old Generation | |
capacity = 38273024 (36.5MB) | |
used = 2392256 (2.28143310546875MB) | |
free = 35880768 (34.21856689453125MB) | |
6.250501658818493% used | |
PS Perm Generation | |
capacity = 21757952 (20.75MB) | |
used = 14384992 (13.718597412109375MB) | |
free = 7372960 (7.031402587890625MB) | |
66.113722467997% used |
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$ ~/jdk/6u24_x64/bin/jmap -heap `pgrep java` | |
Attaching to process ID 1777, please wait... | |
Debugger attached successfully. | |
Server compiler detected. | |
JVM version is 19.1-b02 | |
using thread-local object allocation. | |
Parallel GC with 4 thread(s) | |
Heap Configuration: | |
MinHeapFreeRatio = 40 | |
MaxHeapFreeRatio = 70 | |
MaxHeapSize = 918552576 (876.0MB) | |
NewSize = 1310720 (1.25MB) | |
MaxNewSize = 17592186044415 MB | |
OldSize = 5439488 (5.1875MB) | |
NewRatio = 2 | |
SurvivorRatio = 8 | |
PermSize = 21757952 (20.75MB) | |
MaxPermSize = 85983232 (82.0MB) | |
Heap Usage: | |
PS Young Generation | |
Eden Space: | |
capacity = 14352384 (13.6875MB) | |
used = 790400 (0.7537841796875MB) | |
free = 13561984 (12.9337158203125MB) | |
5.507099029680365% used | |
From Space: | |
capacity = 2359296 (2.25MB) | |
used = 2342944 (2.234405517578125MB) | |
free = 16352 (0.015594482421875MB) | |
99.30691189236111% used | |
To Space: | |
capacity = 2359296 (2.25MB) | |
used = 0 (0.0MB) | |
free = 2359296 (2.25MB) | |
0.0% used | |
PS Old Generation | |
capacity = 38273024 (36.5MB) | |
used = 5710160 (5.4456329345703125MB) | |
free = 32562864 (31.054367065429688MB) | |
14.919542286494007% used | |
PS Perm Generation | |
capacity = 21757952 (20.75MB) | |
used = 14351736 (13.686882019042969MB) | |
free = 7406216 (7.063117980957031MB) | |
65.96087720020708% used |
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$ $JAVA_HOME/bin/jmap -heap `pgrep java` | |
Attaching to process ID 1969, please wait... | |
Debugger attached successfully. | |
Server compiler detected. | |
JVM version is 20.4-b02 | |
using thread-local object allocation. | |
Parallel GC with 4 thread(s) | |
Heap Configuration: | |
MinHeapFreeRatio = 40 | |
MaxHeapFreeRatio = 70 | |
MaxHeapSize = 918552576 (876.0MB) | |
NewSize = 1310720 (1.25MB) | |
MaxNewSize = 17592186044415 MB | |
OldSize = 5439488 (5.1875MB) | |
NewRatio = 2 | |
SurvivorRatio = 8 | |
PermSize = 21757952 (20.75MB) | |
MaxPermSize = 85983232 (82.0MB) | |
Heap Usage: | |
PS Young Generation | |
Eden Space: | |
capacity = 14352384 (13.6875MB) | |
used = 1072208 (1.0225372314453125MB) | |
free = 13280176 (12.664962768554688MB) | |
7.470591645262557% used | |
From Space: | |
capacity = 2359296 (2.25MB) | |
used = 2359296 (2.25MB) | |
free = 0 (0.0MB) | |
100.0% used | |
To Space: | |
capacity = 2359296 (2.25MB) | |
used = 0 (0.0MB) | |
free = 2359296 (2.25MB) | |
0.0% used | |
PS Old Generation | |
capacity = 38273024 (36.5MB) | |
used = 5554640 (5.2973175048828125MB) | |
free = 32718384 (31.202682495117188MB) | |
14.513198643514555% used | |
PS Perm Generation | |
capacity = 21757952 (20.75MB) | |
used = 14750312 (14.066993713378906MB) | |
free = 7007640 (6.683006286621094MB) | |
67.79274078736822% used |
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$ groovysh | |
-XX:InitialHeapSize=57344000 -XX:MaxHeapSize=917504000 -XX:ParallelGCThreads=4 -XX:+PrintCommandLineFlags -XX:+UseCompressedOops -XX:+UseParallelGC | |
Groovy Shell (1.7.7, JVM: 1.7.0_01) | |
Type 'help' or '\h' for help. | |
---------------------------------------------------------------------------------------------------------------------------- | |
groovy:000> |
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