Hi Prasad, As far as I remember offheap memory allocated with use of Unsafe is not reflected in Native Memory Tracking report. You are right that documentation is not verbose about reported categories [1]. It might be the case that memory allocated by ByteBuffer.allocateDirect falls into "internal" category. You can check it out by writing an example application using ByteBuffer.allocateDirect.
[1] https://docs.oracle.com/javase/8/docs/technotes/guides/troubleshoot/tooldescr022.html#BABHIFJC пн, 18 февр. 2019 г. в 16:04, Dmitriy Pavlov <[email protected]>: > > Hi. > > Please don't use posting to both dev/user lists simultaneously. > > If your question is not related to any contribution you are planning to do, > then the user list is a better place to ask, because a possible answer may be > interesting to all Ignite users. > > If you are going to fix any issue and would like to discuss a proposal, > please use dev list. > > Sincerely, > Dmitriy Pavlov > > пн, 18 февр. 2019 г. в 16:00, Prasad Bhalerao <[email protected]>: >> >> Hi, >> >> I have set the off heap size to 500 MB and max heap size to 512 MB. >> >> My process is taking around 1.7 GB on Windows 10 as per the task manager. So >> I decided to track the memory distribution using jcmd to find out if there >> are any memory leaks in non-heap space. >> >> After pushing the data to cache I took the native memory summary using jcmd >> tool. >> >> I am trying to understand in which of the following section, allocated off >> heap memory goes? >> >> Does off heap come under "Internal" category? Can any ignite memory expert >> help me with this? >> >> Oracle documentation does not clearly talks about it. I am also attaching >> the native memory detail file. >> >> C:\Java64\jdk1.8.0_144\bin>jcmd.exe 16956 VM.native_memory summary >> >> 16956: >> >> Total: reserved=3513712KB, committed=2249108KB >> >> - Java Heap (reserved=524288KB, committed=524288KB) >> >> (mmap: reserved=524288KB, committed=524288KB) >> >> >> >> - Class (reserved=1127107KB, committed=86507KB) >> >> (classes #13259) >> >> (malloc=10947KB #17120) >> >> (mmap: reserved=1116160KB, committed=75560KB) >> >> >> >> - Thread (reserved=89748KB, committed=89748KB) >> >> (thread #88) >> >> (stack: reserved=89088KB, committed=89088KB) >> >> (malloc=270KB #454) >> >> (arena=391KB #175) >> >> >> >> - Code (reserved=254854KB, committed=30930KB) >> >> (malloc=5254KB #8013) >> >> (mmap: reserved=249600KB, committed=25676KB) >> >> >> >> - GC (reserved=29656KB, committed=29576KB) >> >> (malloc=10392KB #385) >> >> (mmap: reserved=19264KB, committed=19184KB) >> >> >> >> - Compiler (reserved=188KB, committed=188KB) >> >> (malloc=57KB #243) >> >> (arena=131KB #3) >> >> >> >> - Internal (reserved=1464736KB, committed=1464736KB) >> >> (malloc=1464672KB #40848) >> >> (mmap: reserved=64KB, committed=64KB) >> >> >> >> - Symbol (reserved=18973KB, committed=18973KB) >> >> (malloc=15353KB #152350) >> >> (arena=3620KB #1) >> >> >> >> - Native Memory Tracking (reserved=3450KB, committed=3450KB) >> >> (malloc=14KB #167) >> >> (tracking overhead=3436KB) >> >> >> >> - Arena Chunk (reserved=712KB, committed=712KB) >> >> (malloc=712KB) -- Best regards, Ivan Pavlukhin
