GC (Allocation Failure) [PSYoungGen]
Recently we switched our code to java8 from java7. We are getting GC allocation failure in every 10 minuts for PSYoungGen. We even tried having switch -XX:NewSize and -XX:NewMaxSize in place to around 5GB(total heap size is 10GB). But even after gc allocation failure is getting printed and PSYoungGen is triggering to the almost the size(5GB). Added some logs :
[GC (Allocation Failure) [PSYoungGen: 3145728K->114922K(3670016K)] 3145728K->115026K(5767168K), 0.2511084 secs] [Times: user=0.26 sys=0.14, real=0.25 secs]
[GC (Allocation Failure) [PSYoungGen: 4443141K->125893K(4718592K)] 4443261K->126229K(6815744K), 0.2318927 secs] [Times: user=0.42 sys=0.22, real=0.24 secs]
In one of [answers]: Java GC (Allocation Failure) related to this I have seen this is normal behavior, just curious to know is there any way to overcome this ? Thanks.
java garbage-collection
asked Nov 13 '18 at 7:49
BhaskarBhaskar
4710
|
show 5 more comments
Recently we switched our code to java8 from java7. We are getting GC allocation failure in every 10 minuts for PSYoungGen. We even tried having switch -XX:NewSize and -XX:NewMaxSize in place to around 5GB(total heap size is 10GB). But even after gc allocation failure is getting printed and PSYoungGen is triggering to the almost the size(5GB). Added some logs :
[GC (Allocation Failure) [PSYoungGen: 3145728K->114922K(3670016K)] 3145728K->115026K(5767168K), 0.2511084 secs] [Times: user=0.26 sys=0.14, real=0.25 secs]
[GC (Allocation Failure) [PSYoungGen: 4443141K->125893K(4718592K)] 4443261K->126229K(6815744K), 0.2318927 secs] [Times: user=0.42 sys=0.22, real=0.24 secs]
In one of [answers]: Java GC (Allocation Failure) related to this I have seen this is normal behavior, just curious to know is there any way to overcome this ? Thanks.
java garbage-collection
asked Nov 13 '18 at 7:49
BhaskarBhaskar
4710
Is it possible that this was happening before and you are now just seeing that it's happening due to some increased logging that might have been introduced in jre8? Do you know what kind of allocations you routinely make (e.g. are they very large in size)?
– David Goate
Nov 13 '18 at 9:12
I think it is the case that the NewSize you might be setting is controlling the size of the entire new generation (which is composed of eden and survivor spaces) so perhaps your eden is still not sufficiently sized to allocate directly into for new large objects (perhaps large byte's for example)
– David Goate
Nov 13 '18 at 9:16
Major GC consumption is in young generation only and not in old. We have 10 GB allocated in totalfor heap and out of which 5GB for young.
– Bhaskar
Nov 13 '18 at 9:17
But prior moving to java8, there was no such Allocation Failure in gc logs.
– Bhaskar
Nov 13 '18 at 9:18
What I am questioning is that even if you set the new to 5Gb, I think (docs.oracle.com/javase/8/docs/technotes/guides/vm/gctuning/…) withSurvivorRatiodefault being8I think would mean approx 1.25Gb of survivor space, leaving 3.75 Gb eden. Is it possible you allocate objects close to this size?
– David Goate
Nov 13 '18 at 9:22
|
show 5 more comments
Recently we switched our code to java8 from java7. We are getting GC allocation failure in every 10 minuts for PSYoungGen. We even tried having switch -XX:NewSize and -XX:NewMaxSize in place to around 5GB(total heap size is 10GB). But even after gc allocation failure is getting printed and PSYoungGen is triggering to the almost the size(5GB). Added some logs :
[GC (Allocation Failure) [PSYoungGen: 3145728K->114922K(3670016K)] 3145728K->115026K(5767168K), 0.2511084 secs] [Times: user=0.26 sys=0.14, real=0.25 secs]
[GC (Allocation Failure) [PSYoungGen: 4443141K->125893K(4718592K)] 4443261K->126229K(6815744K), 0.2318927 secs] [Times: user=0.42 sys=0.22, real=0.24 secs]
In one of [answers]: Java GC (Allocation Failure) related to this I have seen this is normal behavior, just curious to know is there any way to overcome this ? Thanks.
java garbage-collection
asked Nov 13 '18 at 7:49
BhaskarBhaskar
4710
Recently we switched our code to java8 from java7. We are getting GC allocation failure in every 10 minuts for PSYoungGen. We even tried having switch -XX:NewSize and -XX:NewMaxSize in place to around 5GB(total heap size is 10GB). But even after gc allocation failure is getting printed and PSYoungGen is triggering to the almost the size(5GB). Added some logs :
[GC (Allocation Failure) [PSYoungGen: 3145728K->114922K(3670016K)] 3145728K->115026K(5767168K), 0.2511084 secs] [Times: user=0.26 sys=0.14, real=0.25 secs]
[GC (Allocation Failure) [PSYoungGen: 4443141K->125893K(4718592K)] 4443261K->126229K(6815744K), 0.2318927 secs] [Times: user=0.42 sys=0.22, real=0.24 secs]
In one of [answers]: Java GC (Allocation Failure) related to this I have seen this is normal behavior, just curious to know is there any way to overcome this ? Thanks.
java garbage-collection
java garbage-collection
asked Nov 13 '18 at 7:49
BhaskarBhaskar
4710
asked Nov 13 '18 at 7:49
BhaskarBhaskar
4710
edited Nov 13 '18 at 8:06
Bhaskar
asked Nov 13 '18 at 7:49
BhaskarBhaskar
4710
asked Nov 13 '18 at 7:49
BhaskarBhaskar
4710
asked Nov 13 '18 at 7:49
BhaskarBhaskar
4710
4710
Is it possible that this was happening before and you are now just seeing that it's happening due to some increased logging that might have been introduced in jre8? Do you know what kind of allocations you routinely make (e.g. are they very large in size)?
– David Goate
Nov 13 '18 at 9:12
I think it is the case that the NewSize you might be setting is controlling the size of the entire new generation (which is composed of eden and survivor spaces) so perhaps your eden is still not sufficiently sized to allocate directly into for new large objects (perhaps large byte's for example)
– David Goate
Nov 13 '18 at 9:16
Major GC consumption is in young generation only and not in old. We have 10 GB allocated in totalfor heap and out of which 5GB for young.
– Bhaskar
Nov 13 '18 at 9:17
But prior moving to java8, there was no such Allocation Failure in gc logs.
– Bhaskar
Nov 13 '18 at 9:18
What I am questioning is that even if you set the new to 5Gb, I think (docs.oracle.com/javase/8/docs/technotes/guides/vm/gctuning/…) withSurvivorRatiodefault being8I think would mean approx 1.25Gb of survivor space, leaving 3.75 Gb eden. Is it possible you allocate objects close to this size?
– David Goate
Nov 13 '18 at 9:22
|
show 5 more comments
Is it possible that this was happening before and you are now just seeing that it's happening due to some increased logging that might have been introduced in jre8? Do you know what kind of allocations you routinely make (e.g. are they very large in size)?
– David Goate
Nov 13 '18 at 9:12
I think it is the case that the NewSize you might be setting is controlling the size of the entire new generation (which is composed of eden and survivor spaces) so perhaps your eden is still not sufficiently sized to allocate directly into for new large objects (perhaps large byte's for example)
– David Goate
Nov 13 '18 at 9:16
Major GC consumption is in young generation only and not in old. We have 10 GB allocated in totalfor heap and out of which 5GB for young.
– Bhaskar
Nov 13 '18 at 9:17
But prior moving to java8, there was no such Allocation Failure in gc logs.
– Bhaskar
Nov 13 '18 at 9:18
What I am questioning is that even if you set the new to 5Gb, I think (docs.oracle.com/javase/8/docs/technotes/guides/vm/gctuning/…) withSurvivorRatiodefault being8I think would mean approx 1.25Gb of survivor space, leaving 3.75 Gb eden. Is it possible you allocate objects close to this size?
– David Goate
Nov 13 '18 at 9:22
Is it possible that this was happening before and you are now just seeing that it's happening due to some increased logging that might have been introduced in jre8? Do you know what kind of allocations you routinely make (e.g. are they very large in size)?
– David Goate
Nov 13 '18 at 9:12
Is it possible that this was happening before and you are now just seeing that it's happening due to some increased logging that might have been introduced in jre8? Do you know what kind of allocations you routinely make (e.g. are they very large in size)?
– David Goate
Nov 13 '18 at 9:12
I think it is the case that the NewSize you might be setting is controlling the size of the entire new generation (which is composed of eden and survivor spaces) so perhaps your eden is still not sufficiently sized to allocate directly into for new large objects (perhaps large byte's for example)
– David Goate
Nov 13 '18 at 9:16
I think it is the case that the NewSize you might be setting is controlling the size of the entire new generation (which is composed of eden and survivor spaces) so perhaps your eden is still not sufficiently sized to allocate directly into for new large objects (perhaps large byte's for example)
– David Goate
Nov 13 '18 at 9:16
Major GC consumption is in young generation only and not in old. We have 10 GB allocated in totalfor heap and out of which 5GB for young.
– Bhaskar
Nov 13 '18 at 9:17
Major GC consumption is in young generation only and not in old. We have 10 GB allocated in totalfor heap and out of which 5GB for young.
– Bhaskar
Nov 13 '18 at 9:17
But prior moving to java8, there was no such Allocation Failure in gc logs.
– Bhaskar
Nov 13 '18 at 9:18
But prior moving to java8, there was no such Allocation Failure in gc logs.
– Bhaskar
Nov 13 '18 at 9:18
What I am questioning is that even if you set the new to 5Gb, I think (docs.oracle.com/javase/8/docs/technotes/guides/vm/gctuning/…) with
SurvivorRatio default being 8 I think would mean approx 1.25Gb of survivor space, leaving 3.75 Gb eden. Is it possible you allocate objects close to this size?– David Goate
Nov 13 '18 at 9:22
What I am questioning is that even if you set the new to 5Gb, I think (docs.oracle.com/javase/8/docs/technotes/guides/vm/gctuning/…) with
SurvivorRatio default being 8 I think would mean approx 1.25Gb of survivor space, leaving 3.75 Gb eden. Is it possible you allocate objects close to this size?– David Goate
Nov 13 '18 at 9:22
|
show 5 more comments
1 Answer
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I think it is the case that the NewSize you might be setting is controlling the size of the entire new generation (which is composed of eden and survivor spaces) so perhaps your eden is still not sufficiently sized to allocate directly into for new large objects (perhaps large byte's for example).
What I am questioning is that even if you set the new to 5Gb, I think Oracle's docs suggest with SurvivorRatio default being 8 would mean approx 1.25Gb of survivor space, leaving 3.75 Gb eden. Is it possible you allocate objects above or close to this size?
With regards to the no such logs, in the answer you link to in your OP the accepted answer makes the comment
"Older JVM were not printing GC cause for minor GC cycles.
So perhaps this was always happening and you just didn't know until now.
answered Nov 13 '18 at 10:03
David GoateDavid Goate
1,09521534
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I think it is the case that the NewSize you might be setting is controlling the size of the entire new generation (which is composed of eden and survivor spaces) so perhaps your eden is still not sufficiently sized to allocate directly into for new large objects (perhaps large byte's for example).
What I am questioning is that even if you set the new to 5Gb, I think Oracle's docs suggest with SurvivorRatio default being 8 would mean approx 1.25Gb of survivor space, leaving 3.75 Gb eden. Is it possible you allocate objects above or close to this size?
With regards to the no such logs, in the answer you link to in your OP the accepted answer makes the comment
"Older JVM were not printing GC cause for minor GC cycles.
So perhaps this was always happening and you just didn't know until now.
answered Nov 13 '18 at 10:03
David GoateDavid Goate
1,09521534
add a comment |
I think it is the case that the NewSize you might be setting is controlling the size of the entire new generation (which is composed of eden and survivor spaces) so perhaps your eden is still not sufficiently sized to allocate directly into for new large objects (perhaps large byte's for example).
What I am questioning is that even if you set the new to 5Gb, I think Oracle's docs suggest with SurvivorRatio default being 8 would mean approx 1.25Gb of survivor space, leaving 3.75 Gb eden. Is it possible you allocate objects above or close to this size?
With regards to the no such logs, in the answer you link to in your OP the accepted answer makes the comment
"Older JVM were not printing GC cause for minor GC cycles.
So perhaps this was always happening and you just didn't know until now.
answered Nov 13 '18 at 10:03
David GoateDavid Goate
1,09521534
add a comment |
I think it is the case that the NewSize you might be setting is controlling the size of the entire new generation (which is composed of eden and survivor spaces) so perhaps your eden is still not sufficiently sized to allocate directly into for new large objects (perhaps large byte's for example).
What I am questioning is that even if you set the new to 5Gb, I think Oracle's docs suggest with SurvivorRatio default being 8 would mean approx 1.25Gb of survivor space, leaving 3.75 Gb eden. Is it possible you allocate objects above or close to this size?
With regards to the no such logs, in the answer you link to in your OP the accepted answer makes the comment
"Older JVM were not printing GC cause for minor GC cycles.
So perhaps this was always happening and you just didn't know until now.
answered Nov 13 '18 at 10:03
David GoateDavid Goate
1,09521534
I think it is the case that the NewSize you might be setting is controlling the size of the entire new generation (which is composed of eden and survivor spaces) so perhaps your eden is still not sufficiently sized to allocate directly into for new large objects (perhaps large byte's for example).
What I am questioning is that even if you set the new to 5Gb, I think Oracle's docs suggest with SurvivorRatio default being 8 would mean approx 1.25Gb of survivor space, leaving 3.75 Gb eden. Is it possible you allocate objects above or close to this size?
With regards to the no such logs, in the answer you link to in your OP the accepted answer makes the comment
"Older JVM were not printing GC cause for minor GC cycles.
So perhaps this was always happening and you just didn't know until now.
answered Nov 13 '18 at 10:03
David GoateDavid Goate
1,09521534
answered Nov 13 '18 at 10:03
David GoateDavid Goate
1,09521534
answered Nov 13 '18 at 10:03
David GoateDavid Goate
1,09521534
answered Nov 13 '18 at 10:03
David GoateDavid Goate
1,09521534
1,09521534
add a comment |
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Is it possible that this was happening before and you are now just seeing that it's happening due to some increased logging that might have been introduced in jre8? Do you know what kind of allocations you routinely make (e.g. are they very large in size)?
– David Goate
Nov 13 '18 at 9:12
I think it is the case that the NewSize you might be setting is controlling the size of the entire new generation (which is composed of eden and survivor spaces) so perhaps your eden is still not sufficiently sized to allocate directly into for new large objects (perhaps large byte's for example)
– David Goate
Nov 13 '18 at 9:16
Major GC consumption is in young generation only and not in old. We have 10 GB allocated in totalfor heap and out of which 5GB for young.
– Bhaskar
Nov 13 '18 at 9:17
But prior moving to java8, there was no such Allocation Failure in gc logs.
– Bhaskar
Nov 13 '18 at 9:18
What I am questioning is that even if you set the new to 5Gb, I think (docs.oracle.com/javase/8/docs/technotes/guides/vm/gctuning/…) with
SurvivorRatiodefault being8I think would mean approx 1.25Gb of survivor space, leaving 3.75 Gb eden. Is it possible you allocate objects close to this size?– David Goate
Nov 13 '18 at 9:22