求助>jvm堆外内存分析>
4回复
2月前

jvm堆外内存分析



问题描述:
某一个系统生产环境java进程占用6GB内存,但是堆的最大内存2GB,导致操作系统发现内存太大,直接被操作系统kill进程,由于项目里使用了rocketmq,使用了netty,通过硬编码方式查到netty 堆外noclear的内存在400Mb左右,2天前刚开始使用mq之后堆外是100MB左右,目前还不知道是哪块的问题,社区大神帮忙分析分析,谢谢

以下是刚开始执行的jcmd pid VM.native_memory diff命令:

38539:

Native Memory Tracking:

Total: reserved=4496412KB, committed=3326408KB
-                 Java Heap (reserved=2097152KB, committed=2097152KB)
                            (mmap: reserved=2097152KB, committed=2097152KB)

-                     Class (reserved=1193115KB, committed=160195KB)
                            (classes #24574)
                            (malloc=13467KB #59015)
                            (mmap: reserved=1179648KB, committed=146728KB)

-                    Thread (reserved=260787KB, committed=260787KB)
                            (thread #490)
                            (stack: reserved=258416KB, committed=258416KB)
                            (malloc=1605KB #2454)
                            (arena=766KB #976)

-                      Code (reserved=273322KB, committed=136238KB)
                            (malloc=23722KB #31388)
                            (mmap: reserved=249600KB, committed=112516KB)

-                        GC (reserved=85878KB, committed=85878KB)
                            (malloc=9254KB #887)
                            (mmap: reserved=76624KB, committed=76624KB)

-                  Compiler (reserved=1232KB, committed=1232KB)
                            (malloc=1102KB #3472)
                            (arena=131KB #6)

-                  Internal (reserved=546814KB, committed=546814KB)
                            (malloc=546782KB #36014)
                            (mmap: reserved=32KB, committed=32KB)

-                    Symbol (reserved=30738KB, committed=30738KB)
                            (malloc=26734KB #272996)
                            (arena=4004KB #1)

-    Native Memory Tracking (reserved=7204KB, committed=7204KB)
                            (malloc=689KB #9627)
                            (tracking overhead=6515KB)

-               Arena Chunk (reserved=170KB, committed=170KB)
                            (malloc=170KB)

2天后的差异值:

38539:

Native Memory Tracking:

Total: reserved=4699957KB +203732KB, committed=3539505KB +213284KB

-                 Java Heap (reserved=2097152KB, committed=2097152KB)
                            (mmap: reserved=2097152KB, committed=2097152KB)

-                     Class (reserved=1195446KB +2331KB, committed=162782KB +2587KB)
                            (classes #24734 +160)
                            (malloc=13750KB +283KB #58165 -844)
                            (mmap: reserved=1181696KB +2048KB, committed=149032KB +2304KB)

-                    Thread (reserved=302944KB +42125KB, committed=302944KB +42125KB)
                            (thread #571 +81)
                            (stack: reserved=300212KB +41796KB, committed=300212KB +41796KB)
                            (malloc=1872KB +266KB #2859 +405)
                            (arena=861KB +63 #1138 +162)

-                      Code (reserved=269464KB -3865KB, committed=141676KB +5431KB)
                            (malloc=19864KB -3865KB #22239 -9147)
                            (mmap: reserved=249600KB, committed=121812KB +9296KB)

-                        GC (reserved=85878KB +1KB, committed=85878KB +1KB)
                            (malloc=9254KB +1KB #903 +16)
                            (mmap: reserved=76624KB, committed=76624KB)

-                  Compiler (reserved=1438KB +206KB, committed=1438KB +206KB)
                            (malloc=1308KB +206KB #2563 -909)
                            (arena=131KB #6)

-                  Internal (reserved=709505KB +162691KB, committed=709505KB +162691KB)
                            (malloc=709473KB +162691KB #38434 +2420)
                            (mmap: reserved=32KB, committed=32KB)

-                    Symbol (reserved=30788KB +50KB, committed=30788KB +50KB)
                            (malloc=26784KB +50KB #273541 +545)
                            (arena=4004KB #1)

-    Native Memory Tracking (reserved=7167KB +125KB, committed=7167KB +125KB)
                            (malloc=753KB +197KB #10520 +2700)
                            (tracking overhead=6414KB -73KB)

-               Arena Chunk (reserved=174KB +68KB, committed=174KB +68KB)
                            (malloc=174KB +68KB)

netty统计堆外内存日志:

Jan 10 10:21:32 pay1 push[38537]: 2020-01-10 10:21:32.086  WARN 38539 --- [pool-6-thread-1] c.d.p.p.PlatformModuleAutoConfiguration  : memoryInfo: max memory:2047mb | total memory:2047mb | free memory:1453mb
Jan 10 10:21:32 pay1 push[38537]: 2020-01-10 10:21:32.086  WARN 38539 --- [pool-6-thread-1] c.d.p.p.PlatformModuleAutoConfiguration  : memoryInfo: maxDirectMemory:1963mb 是否支持noclear:true noclear占用堆外内存:112mb clear占用堆外内存:{ name:direct; count:30; memoryUsed:0;}{ name:mapped; count:0; memoryUsed:0;}
-------------------------------------------------------
Jan 13 14:15:32 pay1 push[38537]: 2020-01-13 14:15:32.086  WARN 38539 --- [pool-6-thread-1] c.d.p.p.PlatformModuleAutoConfiguration  : memoryInfo: max memory:2047mb | total memory:2047mb | free memory:142mb
Jan 13 14:15:32 pay1 push[38537]: 2020-01-13 14:15:32.086  WARN 38539 --- [pool-6-thread-1] c.d.p.p.PlatformModuleAutoConfiguration  : memoryInfo: maxDirectMemory:1963mb 是否支持noclear:true noclear占用堆外内存:432mb clear占用堆外内存:{ name:direct; count:114; memoryUsed:0;}{ name:mapped; count:0; memoryUsed:0;}
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回复列表

Balloon2月前
回复 J~杰:

从上面的数据来看,总的committed的内存差异不大,能否找两次差异大点的采样数据贴出来看看到底是哪块内存的差异

回复
J~杰2月前
回复 J~杰:
38539:

Native Memory Tracking:

Total: reserved=4699990KB, committed=3539538KB
-                 Java Heap (reserved=2097152KB, committed=2097152KB)
                            (mmap: reserved=2097152KB, committed=2097152KB) 
 
-                     Class (reserved=1195446KB, committed=162782KB)
                            (classes #24734)
                            (malloc=13750KB #58165) 
                            (mmap: reserved=1181696KB, committed=149032KB) 
 
-                    Thread (reserved=302976KB, committed=302976KB)
                            (thread #571)
                            (stack: reserved=300212KB, committed=300212KB)
                            (malloc=1872KB #2859) 
                            (arena=893KB #1138)
 
-                      Code (reserved=269465KB, committed=141677KB)
                            (malloc=19865KB #22239) 
                            (mmap: reserved=249600KB, committed=121812KB) 
 
-                        GC (reserved=85878KB, committed=85878KB)
                            (malloc=9254KB #903) 
                            (mmap: reserved=76624KB, committed=76624KB) 
 
-                  Compiler (reserved=1438KB, committed=1438KB)
                            (malloc=1308KB #2563) 
                            (arena=131KB #6)
 
-                  Internal (reserved=709505KB, committed=709505KB)
                            (malloc=709473KB #38434) 
                            (mmap: reserved=32KB, committed=32KB) 
 
-                    Symbol (reserved=30788KB, committed=30788KB)
                            (malloc=26784KB #273541) 
                            (arena=4004KB #1)
 
-    Native Memory Tracking (reserved=7167KB, committed=7167KB)
                            (malloc=753KB #10519) 
                            (tracking overhead=6414KB)
 
-               Arena Chunk (reserved=174KB, committed=174KB)
                            (malloc=174KB) 
 
Virtual memory map:
 
[0x0000000080000000 - 0x0000000100000000] reserved 2097152KB for Java Heap from
    [0x00007fb9e8f4de73]
    [0x00007fb9e8f1439f]
    [0x00007fb9e8db4f10]
    [0x00007fb9e8f14a7a]

	[0x00000000d5580000 - 0x0000000100000000] committed 698880KB from
            [0x00007fb9e8e07e06]
            [0x00007fb9e8e09e56]
            [0x00007fb9e874d934]
            [0x00007fb9e8db5051]

	[0x0000000080000000 - 0x00000000d5580000] committed 1398272KB from
            [0x00007fb9e8e07e06]
            [0x00007fb9e8df814c]
            [0x00007fb9e874d96e]
            [0x00007fb9e8db5051]
 
[0x0000000100000000 - 0x0000000140000000] reserved 1048576KB for Class from
    [0x00007fb9e8f4d201]
    [0x00007fb9e8d08acf]
    [0x00007fb9e8d09584]
    [0x00007fb9e8f14db5]

	[0x00000001010f6000 - 0x0000000101116000] committed 128KB from
            [0x00007fb9e8f4ee40]
            [0x00007fb9e8d05639]
            [0x00007fb9e8d0736f]
            [0x00007fb9e8d07c6b]

	[0x00000001010d6000 - 0x00000001010f6000] committed 128KB from
            [0x00007fb9e8f4ee40]
            [0x00007fb9e8d05639]
            [0x00007fb9e8d05ba0]
            [0x00007fb9e8d070e0]

	[0x00000001010b6000 - 0x00000001010d6000] committed 128KB from
            [0x00007fb9e8f4ee40]
            [0x00007fb9e8d05639]
            [0x00007fb9e8d0736f]
            [0x00007fb9e8d07c6b]

	[0x0000000101056000 - 0x00000001010b6000] committed 384KB from
            [0x00007fb9e8f4ee40]
            [0x00007fb9e8d05639]
            [0x00007fb9e8d05ba0]
            [0x00007fb9e8d070e0]

	[0x0000000101036000 - 0x0000000101056000] committed 128KB from
            [0x00007fb9e8f4ee40]
            [0x00007fb9e8d05639]
            [0x00007fb9e8d0736f]
            [0x00007fb9e8d07c6b]

	[0x0000000101016000 - 0x0000000101036000] committed 128KB from
            [0x00007fb9e8f4ee40]
            [0x00007fb9e8d05639]
            [0x00007fb9e8d05ba0]
            [0x00007fb9e8d070e0]

	[0x0000000100fd6000 - 0x0000000101016000] committed 256KB from
            [0x00007fb9e8f4ee40]
            [0x00007fb9e8d05639]
            [0x00007fb9e8d0736f]
            [0x00007fb9e8d07c6b]

	[0x0000000100f96000 - 0x0000000100fd6000] committed 256KB from
            [0x00007fb9e8f4ee40]
            [0x00007fb9e8d05639]
            [0x00007fb9e8d05ba0]
            [0x00007fb9e8d070e0]

	[0x0000000100ed6000 - 0x0000000100f96000] committed 768KB from
            [0x00007fb9e8f4ee40]
            [0x00007fb9e8d05639]
            [0x00007fb9e8d0736f]
            [0x00007fb9e8d07c6b]

	[0x0000000100eb6000 - 0x0000000100ed6000] committed 128KB from
            [0x00007fb9e8f4ee40]
            [0x00007fb9e8d05639]
            [0x00007fb9e8d05ba0]
            [0x00007fb9e8d070e0]

	[0x0000000100600000 - 0x0000000100eb6000] committed 8920KB from
            [0x00007fb9e8f4ee40]
            [0x00007fb9e8d05639]
            [0x00007fb9e8d0736f]
            [0x00007fb9e8d07c6b]

	[0x00000001005e0000 - 0x0000000100600000] committed 128KB from
            [0x00007fb9e8f4ee40]
            [0x00007fb9e8d05639]
            [0x00007fb9e8d05ba0]
            [0x00007fb9e8d070e0]

	[0x0000000100080000 - 0x00000001005e0000] committed 5504KB from
            [0x00007fb9e8f4ee40]
            [0x00007fb9e8d05639]
            [0x00007fb9e8d0736f]
            [0x00007fb9e8d07c6b]

	[0x0000000100000000 - 0x0000000100080000] committed 512KB from
            [0x00007fb9e8f4ee40]
            [0x00007fb9e8d05639]
            [0x00007fb9e8d05ba0]
            [0x00007fb9e8d070e0]
 
[0x00007fb48f494000 - 0x00007fb48f515000] reserved and committed 516KB for Thread Stack from
    [0x00007fb9e8d8a782]
 
[0x00007fb48f515000 - 0x00007fb48f596000] reserved and committed 516KB for Thread Stack from
    [0x00007fb9e8d8a782]
 
[0x00007fb48f596000 - 0x00007fb48f617000] reserved and committed 516KB for Thread Stack from
    [0x00007fb9e8d8a782]
 
[0x00007fb48f617000 - 0x00007fb48f698000] reserved and committed 516KB for Thread Stack from
    [0x00007fb9e8d8a782]
 
[0x00007fb48f698000 - 0x00007fb48f719000] reserved and committed 516KB for Thread Stack from
    [0x00007fb9e8d8a782]
 
[0x00007fb48f719000 - 0x00007fb48f79a000] reserved and committed 516KB for Thread Stack from
    [0x00007fb9e8d8a782]
 
[0x00007fb48f79a000 - 0x00007fb48f99a000] reserved 2048KB for Class from
    [0x00007fb9e8f4d31d]
    [0x00007fb9e8cff446]
    [0x00007fb9e8d0500b]
    [0x00007fb9e8d05783]

	[0x00007fb48f7da000 - 0x00007fb48f81a000] committed 256KB from
            [0x00007fb9e8f4ee40]
            [0x00007fb9e8d05639]
            [0x00007fb9e8d0736f]
            [0x00007fb9e8d07c6b]

	[0x00007fb48f79a000 - 0x00007fb48f7da000] committed 256KB from
            [0x00007fb9e8f4ee40]
            [0x00007fb9e8d00064]
            [0x00007fb9e8d057b9]
            [0x00007fb9e8d0736f]
 
[0x00007fb48fa75000 - 0x00007fb48faf6000] reserved and committed 516KB for Thread Stack from
    [0x00007fb9e8d8a782]
 
[0x00007fb48faf6000 - 0x00007fb48fb77000] reserved and committed 516KB for Thread Stack from
    [0x00007fb9e8d8a782]
 
[0x00007fb48fb77000 - 0x00007fb48fbf8000] reserved and committed 516KB for Thread Stack from
    [0x00007fb9e8d8a782]
 
[0x00007fb48fcfa000 - 0x00007fb48fd7b000] reserved and committed 516KB for Thread Stack from
    [0x00007fb9e8d8a782]
 
[0x00007fb48fe7d000 - 0x00007fb48fefe000] reserved and committed 516KB for Thread Stack from
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[0x00007fb494043000 - 0x00007fb4940c4000] reserved and committed 516KB for Thread Stack from
    [0x00007fb9e8d8a782]
 
[0x00007fb4940c4000 - 0x00007fb494145000] reserved and committed 516KB for Thread Stack from
    [0x00007fb9e8d8a782]
 
[0x00007fb4941c6000 - 0x00007fb494247000] reserved and committed 516KB for Thread Stack from
    [0x00007fb9e8d8a782]
 
[0x00007fb494247000 - 0x00007fb4942c8000] reserved and committed 516KB for Thread Stack from
    [0x00007fb9e8d8a782]
 
[0x00007fb4942c8000 - 0x00007fb494349000] reserved and committed 516KB for Thread Stack from
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[0x00007fb49444b000 - 0x00007fb4944cc000] reserved and committed 516KB for Thread Stack from
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[0x00007fb4944cc000 - 0x00007fb49454d000] reserved and committed 516KB for Thread Stack from
    [0x00007fb9e8d8a782]
 
[0x00007fb49454d000 - 0x00007fb4945ce000] reserved and committed 516KB for Thread Stack from
    [0x00007fb9e8d8a782]
 
[0x00007fb4945ce000 - 0x00007fb49464f000] reserved and committed 516KB for Thread Stack from
    [0x00007fb9e8d8a782]
 
[0x00007fb4946d0000 - 0x00007fb494751000] reserved and committed 516KB for Thread Stack from
    [0x00007fb9e8d8a782]
 
[0x00007fb4948d4000 - 0x00007fb494955000] reserved and committed 516KB for Thread Stack from
    [0x00007fb9e8d8a782]
 
[0x00007fb4949d6000 - 0x00007fb494a57000] reserved and committed 516KB for Thread Stack from
    [0x00007fb9e8d8a782]
 
[0x00007fb494a57000 - 0x00007fb494ad8000] reserved and committed 516KB for Thread Stack from
    [0x00007fb9e8d8a782]
 
[0x00007fb494b59000 - 0x00007fb494bda000] reserved and committed 516KB for Thread Stack from
    [0x00007fb9e8d8a782]
 
[0x00007fb494bda000 - 0x00007fb494c5b000] reserved and committed 516KB for Thread Stack from
    [0x00007fb9e8d8a782]
 
[0x00007fb494c5b000 - 0x00007fb494cdc000] reserved and committed 516KB for Thread Stack from
    [0x00007fb9e8d8a782]
 
[0x00007fb494d5d000 - 0x00007fb494dde000] reserved and committed 516KB for Thread Stack from
    [0x00007fb9e8d8a782]
 
[0x00007fb494dde000 - 0x00007fb494e5f000] reserved and committed 516KB for Thread Stack from
    [0x00007fb9e8d8a782]
 
[0x00007fb494e5f000 - 0x00007fb494ee0000] reserved and committed 516KB for Thread Stack from
    [0x00007fb9e8d8a782]
 
[0x00007fb494ee0000 - 0x00007fb494f61000] reserved and committed 516KB for Thread Stack from
    [0x00007fb9e8d8a782]
 
[0x00007fb494f61000 - 0x00007fb494fe2000] reserved and committed 516KB for Thread Stack from
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[0x00007fb494fe2000 - 0x00007fb495063000] reserved and committed 516KB for Thread Stack from
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[0x00007fb4950e4000 - 0x00007fb495165000] reserved and committed 516KB for Thread Stack from
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[0x00007fb4953ea000 - 0x00007fb49546b000] reserved and committed 516KB for Thread Stack from
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[0x00007fb49546b000 - 0x00007fb4954ec000] reserved and committed 516KB for Thread Stack from
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[0x00007fb4954ec000 - 0x00007fb49556d000] reserved and committed 516KB for Thread Stack from
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[0x00007fb49556d000 - 0x00007fb4955ee000] reserved and committed 516KB for Thread Stack from
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[0x00007fb49566f000 - 0x00007fb4956f0000] reserved and committed 516KB for Thread Stack from
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[0x00007fb4956f0000 - 0x00007fb495771000] reserved and committed 516KB for Thread Stack from
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[0x00007fb495779000 - 0x00007fb4957fa000] reserved and committed 516KB for Thread Stack from
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[0x00007fb4957fa000 - 0x00007fb49587b000] reserved and committed 516KB for Thread Stack from
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[0x00007fb49587b000 - 0x00007fb4958fc000] reserved and committed 516KB for Thread Stack from
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[0x00007fb4958fc000 - 0x00007fb49597d000] reserved and committed 516KB for Thread Stack from
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[0x00007fb49597d000 - 0x00007fb4959fe000] reserved and committed 516KB for Thread Stack from
    [0x00007fb9e8d8a782]
 
[0x00007fb4959fe000 - 0x00007fb495a7f000] reserved and committed 516KB for Thread Stack from
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[0x00007fb495b00000 - 0x00007fb495b81000] reserved and committed 516KB for Thread Stack from
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[0x00007fb495c02000 - 0x00007fb495c83000] reserved and committed 516KB for Thread Stack from
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[0x00007fb495d85000 - 0x00007fb495e06000] reserved and committed 516KB for Thread Stack from
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[0x00007fb495e06000 - 0x00007fb495e87000] reserved and committed 516KB for Thread Stack from
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[0x00007fb495ee1000 - 0x00007fb495f62000] reserved and committed 516KB for Thread Stack from
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[0x00007fb495f62000 - 0x00007fb495fe3000] reserved and committed 516KB for Thread Stack from
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[0x00007fb495fe3000 - 0x00007fb496064000] reserved and committed 516KB for Thread Stack from
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[0x00007fb496064000 - 0x00007fb4960e5000] reserved and committed 516KB for Thread Stack from
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[0x00007fb4960e5000 - 0x00007fb496166000] reserved and committed 516KB for Thread Stack from
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[0x00007fb496166000 - 0x00007fb4961e7000] reserved and committed 516KB for Thread Stack from
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[0x00007fb4961e7000 - 0x00007fb496268000] reserved and committed 516KB for Thread Stack from
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[0x00007fb496268000 - 0x00007fb4962e9000] reserved and committed 516KB for Thread Stack from
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[0x00007fb4962e9000 - 0x00007fb49636a000] reserved and committed 516KB for Thread Stack from
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[0x00007fb4963eb000 - 0x00007fb49646c000] reserved and committed 516KB for Thread Stack from
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[0x00007fb49646c000 - 0x00007fb4964ed000] reserved and committed 516KB for Thread Stack from
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[0x00007fb4964ed000 - 0x00007fb49656e000] reserved and committed 516KB for Thread Stack from
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[0x00007fb49656e000 - 0x00007fb4965ef000] reserved and committed 516KB for Thread Stack from
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[0x00007fb4965ef000 - 0x00007fb496670000] reserved and committed 516KB for Thread Stack from
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[0x00007fb496670000 - 0x00007fb4966f1000] reserved and committed 516KB for Thread Stack from
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[0x00007fb4966f1000 - 0x00007fb496772000] reserved and committed 516KB for Thread Stack from
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[0x00007fb496772000 - 0x00007fb4967f3000] reserved and committed 516KB for Thread Stack from
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[0x00007fb4967f3000 - 0x00007fb496874000] reserved and committed 516KB for Thread Stack from
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[0x00007fb496874000 - 0x00007fb4968f5000] reserved and committed 516KB for Thread Stack from
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[0x00007fb4968f5000 - 0x00007fb496976000] reserved and committed 516KB for Thread Stack from
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[0x00007fb496976000 - 0x00007fb4969f7000] reserved and committed 516KB for Thread Stack from
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[0x00007fb4969f7000 - 0x00007fb496a78000] reserved and committed 516KB for Thread Stack from
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[0x00007fb497a79000 - 0x00007fb497afa000] reserved and committed 516KB for Thread Stack from
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[0x00007fb497afa000 - 0x00007fb497b7b000] reserved and committed 516KB for Thread Stack from
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[0x00007fb497b7b000 - 0x00007fb497bfc000] reserved and committed 516KB for Thread Stack from
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回复
J~杰2月前
回复 Balloon:

但是我发现详细的内存分配64Mb的比较少的,我刚把内存信息贴上去了

回复