My server is Wildfly.10.1.0.final.
I discovery sharp inscrease of "committed" eden space memory. Is there anyone explain some case committed eden space increase? Committed survivor memory decrease by committed eden space increase is problem too.
Strangely, Finally I always faced on "out of memory : metaspace".
here is my java options and metaspace memory graph.
ps. 오전11:00 = AM11:00
Related
My jenkins instance has been running for over two years without issue but yesterday quit responding to http requests. No errors, just clocks and clocks.
I've restarted the service, then restarted the entire server.
There's been a lot of mention of a thread dump. I attempted to get that but I'm not sure that this is that.
Heap
PSYoungGen total 663552K, used 244203K [0x00000000d6700000, 0x0000000100000000, 0x0000000100000000)
eden space 646144K, 36% used [0x00000000d6700000,0x00000000e4df5f70,0x00000000fde00000)
from space 17408K, 44% used [0x00000000fef00000,0x00000000ff685060,0x0000000100000000)
to space 17408K, 0% used [0x00000000fde00000,0x00000000fde00000,0x00000000fef00000)
ParOldGen total 194048K, used 85627K [0x0000000083400000, 0x000000008f180000, 0x00000000d6700000)
object space 194048K, 44% used [0x0000000083400000,0x000000008879ee10,0x000000008f180000)
Metaspace used 96605K, capacity 104986K, committed 105108K, reserved 1138688K
class space used 12782K, capacity 14961K, committed 14996K, reserved 1048576K
Ubuntu 16.04.5 LTS
I prefer looking in the jenkins log file. There you can see error and then fix them.
I am using Delphi 7 Enterprise under Windows 7 64 bit.
My computer had 16 GB of RAM.
I try to use kbmMemTable 7.70.00 Professional Edition (http://news.components4developers.com/products_kbmMemTable.html) .
My table has 150,000 records, but when I try to copy the data from Dataset to the kbmMemTable it only copies 29000 records and I get this error: EOutOfMemory
I saw this message:
https://groups.yahoo.com/neo/groups/memtable/conversations/topics/5769,
but it didn't solve my problem.
An out of memory can happen of various reasons:
Your application uses too much memory in general. A 32 bit application typically runs out of memory when it has allocated 1.4GB using FastMM memory manager. Other memory managers may have worse or better ranges.
Memory fragementation. There may not be enough space in memory for a single large allocation that is requested. kbmMemTable will attempt to allocate roughly 200000 x 4 bytes as one single large allocation. As its own largest single allocation. That shouldnt be a problem.
Too many small allocations leading to the above memory fragmentation. kbmMemTable will allocate from 1 to n blocks of memory per record depending on the setting of the Performance property .
If Performance is set to fast, then 1 block will be allocated (unless blobs fields exists, in which case an additional allocation will be made per not null blob field).
If Performance is balanced or small, then each string field will allocate another block of memory per record.
best regards
Kim/C4D
Im currently doing dynamic memory analysis, for our eclipse based application using jprobe.After starting the eclipse application and jprobe, when I try to profile the eclipse application, the application gets closed abruptly causing a Fatal error. A fatal error log file is generated. In the Fatal error log file, I could see that the PermGen space seems to be full. Below is a sample Heap summary which I got in the log file
Heap
def new generation total 960K, used 8K [0x07b20000, 0x07c20000, 0x08000000)
eden space 896K, 0% used [0x07b20000, 0x07b22328, 0x07c00000)
from space 64K, 0% used [0x07c00000, 0x07c00000, 0x07c10000)
to space 64K, 0% used [0x07c10000, 0x07c10000, 0x07c20000)
tenured generation total 9324K, used 5606K [0x08000000, 0x0891b000, 0x0bb20000)
the space 9324K, 60% used [0x08000000, 0x08579918, 0x08579a00, 0x0891b000)
compacting perm gen total 31744K, used 31723K [0x0bb20000, 0x0da20000, 0x2bb20000)
the space 31744K, 99% used [0x0bb20000, 0x0da1af00, 0x0da1b000, 0x0da20000)
ro space 8192K, 66% used [0x2bb20000, 0x2c069920, 0x2c069a00, 0x2c320000)
rw space 12288K, 52% used [0x2c320000, 0x2c966130, 0x2c966200, 0x2cf20000)
I tried to increase the permGen space, using the command -XX:MaxPermSize=512m. But that doesnt seem to work. I would like to know how to increase the PermGen size via command prompt. I would like to know if I have to go to the java location in my computer and execute the above command or should I increase the PermGen space specifically for the eclipse application or Jprobe ? Please advise.
Any help on this is much appreciated.
How do I determine the lower bound for the JVM option Xmx or otherwise economize on memory without a trial and error process? I happen to set Xms and Xmx to be the same amount, which I assume helps to economize on execution time. If I set Xmx to 7G, and likewise Xms, it will happily report that all of it is being used. I use the following query:
Runtime.getRuntime().totalMemory()
If I set it to less than that, say 5GB, likewise all of it will be used. It is not until I provide very much less, say 1GB will there be an out-of-heap exception. Since my execution times are typically 10 hours or more, I need to avoid trial and error processes.
I'd execute the program with plenty of heap while monitoring heap usage with JConsole. Take note of the highest memory use after a major garbage collection, and set about maximum heap size 50% to 100% higher than that amount to avoid frequent garbage collection.
As an aside, totalMemory reports the size of the heap, not how much of it is presently used. If you set minimum and maximum heap size to the same number, totalMemory will be the same irrespective of what your program does ...
Using Xms256M and Xmx512M, and a trivial program, freeMemory is 244M and totalMemory is 245M and maxMemory is 455M. Using Xms512M and Xmx512M, the amounts are 488M, 490M, and 490M. This suggests that totalMemory is a variable amount that can vary if Xms is less than Xmx. That suggests the answer to the question is to set Xms to a small amount and monitor the highwater mark of totalMemory. It also suggests maxMemory is the ultimate heap size that cannot be exceed by the total of current and future objects.
Once the highwater mark is known, set Xmx to be somewhat more than that to be prudent -- but not excessively more because this is an economization effort -- and set Xms to be the same amount to get the time efficiency that is evidently preferred.
I am using R on some relatively big data and am hitting some memory issues. This is on Linux. I have significantly less data than the available memory on the system so it's an issue of managing transient allocation.
When I run gc(), I get the following listing
used (Mb) gc trigger (Mb) max used (Mb)
Ncells 2147186 114.7 3215540 171.8 2945794 157.4
Vcells 251427223 1918.3 592488509 4520.4 592482377 4520.3
yet R appears to have 4gb allocated in resident memory and 2gb in swap. I'm assuming this is OS-allocated memory that R's memory management system will allocate and GC as needed. However, lets say that I don't want to let R OS-allocate more than 4gb, to prevent swap thrashing. I could always ulimit, but then it would just crash instead of working within the reduced space and GCing more often. Is there a way to specify an arbitrary maximum for the gc trigger and make sure that R never os-allocates more? Or is there something else I could do to manage memory usage?
In short: no. I found that you simply cannot micromanage memory management and gc().
On the other hand, you could try to keep your data in memory, but 'outside' of R. The bigmemory makes that fairly easy. Of course, using a 64bit version of R and ample ram may make the problem go away too.