JVM metaspace is filled after minor garbage collection
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I have been looking into Java memory management and various sections in the heap memory like eden, s0, s1, old gen and metaspace. I was using VisualGC for tracking how memory is filled among different sections of heap. I noticed there is a sharp increase in the amount of memory occupied in the metaspace area after first garbage collection.
Here's an image of the VisualGC representation:
I would like to understand what gets added to metaspace after the first gc. I did research but couldn't get answers. Any help here?
java garbage-collection heap-memory visualvm metaspace
edited Nov 23 '18 at 18:24
Slaw
10.3k31235
asked Nov 23 '18 at 17:36
meesunmeesun
213
add a comment |
I have been looking into Java memory management and various sections in the heap memory like eden, s0, s1, old gen and metaspace. I was using VisualGC for tracking how memory is filled among different sections of heap. I noticed there is a sharp increase in the amount of memory occupied in the metaspace area after first garbage collection.
Here's an image of the VisualGC representation:
I would like to understand what gets added to metaspace after the first gc. I did research but couldn't get answers. Any help here?
java garbage-collection heap-memory visualvm metaspace
edited Nov 23 '18 at 18:24
Slaw
10.3k31235
asked Nov 23 '18 at 17:36
meesunmeesun
213
add a comment |
I have been looking into Java memory management and various sections in the heap memory like eden, s0, s1, old gen and metaspace. I was using VisualGC for tracking how memory is filled among different sections of heap. I noticed there is a sharp increase in the amount of memory occupied in the metaspace area after first garbage collection.
Here's an image of the VisualGC representation:
I would like to understand what gets added to metaspace after the first gc. I did research but couldn't get answers. Any help here?
java garbage-collection heap-memory visualvm metaspace
edited Nov 23 '18 at 18:24
Slaw
10.3k31235
asked Nov 23 '18 at 17:36
meesunmeesun
213
I have been looking into Java memory management and various sections in the heap memory like eden, s0, s1, old gen and metaspace. I was using VisualGC for tracking how memory is filled among different sections of heap. I noticed there is a sharp increase in the amount of memory occupied in the metaspace area after first garbage collection.
Here's an image of the VisualGC representation:
I would like to understand what gets added to metaspace after the first gc. I did research but couldn't get answers. Any help here?
java garbage-collection heap-memory visualvm metaspace
java garbage-collection heap-memory visualvm metaspace
edited Nov 23 '18 at 18:24
Slaw
10.3k31235
asked Nov 23 '18 at 17:36
meesunmeesun
213
edited Nov 23 '18 at 18:24
Slaw
10.3k31235
asked Nov 23 '18 at 17:36
meesunmeesun
213
edited Nov 23 '18 at 18:24
Slaw
10.3k31235
edited Nov 23 '18 at 18:24
Slaw
10.3k31235
edited Nov 23 '18 at 18:24
Slaw
10.3k31235
10.3k31235
asked Nov 23 '18 at 17:36
meesunmeesun
213
asked Nov 23 '18 at 17:36
meesunmeesun
213
asked Nov 23 '18 at 17:36
meesunmeesun
213
213
add a comment |
add a comment |
1 Answer
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Metaspace is not "full". According to the captions, the limit for metaspace is 1.008G but you have 8.602M in there (out of a 9.125M initial allocation). That is about 1% of the limit.
Metaspace contains things related to classes; i.e. bytecodes, compiled native code, descriptors, statics. ~8M bytes is quite a modest amount of metaspace for a typical Java application that pulls in a few Java SE or 3rd-party library classes.
I would like to understand what gets added to metaspace after the first gc.
I suspect that it is just an accounting thing; i.e. the amount of memory used by metaspace only gets updated when the GC runs. If you notice, the 2 apparent changes in metaspace usage (after the start of recording) both coincide with a GC event.
answered Nov 24 '18 at 1:20
Stephen CStephen C
527k72588945
add a comment |
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1 Answer
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1 Answer
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active
oldest
votes
active
oldest
votes
active
oldest
votes
Metaspace is not "full". According to the captions, the limit for metaspace is 1.008G but you have 8.602M in there (out of a 9.125M initial allocation). That is about 1% of the limit.
Metaspace contains things related to classes; i.e. bytecodes, compiled native code, descriptors, statics. ~8M bytes is quite a modest amount of metaspace for a typical Java application that pulls in a few Java SE or 3rd-party library classes.
I would like to understand what gets added to metaspace after the first gc.
I suspect that it is just an accounting thing; i.e. the amount of memory used by metaspace only gets updated when the GC runs. If you notice, the 2 apparent changes in metaspace usage (after the start of recording) both coincide with a GC event.
answered Nov 24 '18 at 1:20
Stephen CStephen C
527k72588945
add a comment |
Metaspace is not "full". According to the captions, the limit for metaspace is 1.008G but you have 8.602M in there (out of a 9.125M initial allocation). That is about 1% of the limit.
Metaspace contains things related to classes; i.e. bytecodes, compiled native code, descriptors, statics. ~8M bytes is quite a modest amount of metaspace for a typical Java application that pulls in a few Java SE or 3rd-party library classes.
I would like to understand what gets added to metaspace after the first gc.
I suspect that it is just an accounting thing; i.e. the amount of memory used by metaspace only gets updated when the GC runs. If you notice, the 2 apparent changes in metaspace usage (after the start of recording) both coincide with a GC event.
answered Nov 24 '18 at 1:20
Stephen CStephen C
527k72588945
add a comment |
Metaspace is not "full". According to the captions, the limit for metaspace is 1.008G but you have 8.602M in there (out of a 9.125M initial allocation). That is about 1% of the limit.
Metaspace contains things related to classes; i.e. bytecodes, compiled native code, descriptors, statics. ~8M bytes is quite a modest amount of metaspace for a typical Java application that pulls in a few Java SE or 3rd-party library classes.
I would like to understand what gets added to metaspace after the first gc.
I suspect that it is just an accounting thing; i.e. the amount of memory used by metaspace only gets updated when the GC runs. If you notice, the 2 apparent changes in metaspace usage (after the start of recording) both coincide with a GC event.
answered Nov 24 '18 at 1:20
Stephen CStephen C
527k72588945
Metaspace is not "full". According to the captions, the limit for metaspace is 1.008G but you have 8.602M in there (out of a 9.125M initial allocation). That is about 1% of the limit.
Metaspace contains things related to classes; i.e. bytecodes, compiled native code, descriptors, statics. ~8M bytes is quite a modest amount of metaspace for a typical Java application that pulls in a few Java SE or 3rd-party library classes.
I would like to understand what gets added to metaspace after the first gc.
I suspect that it is just an accounting thing; i.e. the amount of memory used by metaspace only gets updated when the GC runs. If you notice, the 2 apparent changes in metaspace usage (after the start of recording) both coincide with a GC event.
answered Nov 24 '18 at 1:20
Stephen CStephen C
527k72588945
answered Nov 24 '18 at 1:20
Stephen CStephen C
527k72588945
answered Nov 24 '18 at 1:20
Stephen CStephen C
527k72588945
answered Nov 24 '18 at 1:20
Stephen CStephen C
527k72588945
527k72588945
add a comment |
add a comment |
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