我们有一个ASP.NET Web服务应用程序，与IIS w3wp.exe出现OutOfMemory问题。 OOM发生时，我们得到了w3wp的微型内存转储，并且我们看到它的mem_reserve很大，但是托管堆的大小却很小。问题是我们如何找出使用mem_reserve（虚拟地址空间）的东西。我希望看到一些mem_reserve而不是2.9G。由于mem_reserve不会累加到eeheap中，因此它是否来自非托管堆？还是要确认吗？
0:000> !address -summary
Mapping file section regions...
Mapping module regions...
Mapping PEB regions...
Mapping TEB and stack regions...
Mapping heap regions...
Mapping page heap regions...
Mapping other regions...
Mapping stack trace database regions...
Mapping activation context regions...
--- Usage Summary ---------------- RgnCount ----------- Total Size -------- %ofBusy %ofTotal
<unknown> 1664 d4c1d000 ( 3.324 GB) 92.34% 83.11%
Free 348 19951000 ( 409.316 MB) 9.99%
Image 1184 ad58000 ( 173.344 MB) 4.70% 4.23%
Heap 75 5ab4000 ( 90.703 MB) 2.46% 2.21%
Stack 193 1200000 ( 18.000 MB) 0.49% 0.44%
TEB 64 40000 ( 256.000 kB) 0.01% 0.01%
Other 10 35000 ( 212.000 kB) 0.01% 0.01%
PEB 1 1000 ( 4.000 kB) 0.00% 0.00%
--- Type Summary (for busy) ------ RgnCount ----------- Total Size -------- %ofBusy %ofTotal
MEM_PRIVATE 1323 d6f04000 ( 3.358 GB) 93.28% 83.96%
MEM_IMAGE 1828 dd75000 ( 221.457 MB) 6.01% 5.41%
MEM_MAPPED 40 1a26000 ( 26.148 MB) 0.71% 0.64%
--- State Summary ---------------- RgnCount ----------- Total Size -------- %ofBusy %ofTotal
MEM_RESERVE 746 b8b4e000 ( 2.886 GB) 80.16% 72.15%
MEM_COMMIT 2445 2db51000 ( 731.316 MB) 19.84% 17.85%
MEM_FREE 348 19951000 ( 409.316 MB) 9.99%
--- Protect Summary (for commit) - RgnCount ----------- Total Size -------- %ofBusy %ofTotal
PAGE_READWRITE 1024 1f311000 ( 499.066 MB) 13.54% 12.18%
PAGE_EXECUTE_READ 248 b2e6000 ( 178.898 MB) 4.85% 4.37%
PAGE_READONLY 613 1c1d000 ( 28.113 MB) 0.76% 0.69%
PAGE_WRITECOPY 219 103e000 ( 16.242 MB) 0.44% 0.40%
PAGE_EXECUTE_READWRITE 144 59c000 ( 5.609 MB) 0.15% 0.14%
PAGE_EXECUTE_WRITECOPY 69 21f000 ( 2.121 MB) 0.06% 0.05%
PAGE_READWRITE|PAGE_GUARD 128 144000 ( 1.266 MB) 0.03% 0.03%
--- Largest Region by Usage ----------- Base Address -------- Region Size ----------
<unknown> c2010000 4032000 ( 64.195 MB)
Free 86010000 4000000 ( 64.000 MB)
Image 72f48000 f5d000 ( 15.363 MB)
Heap 64801000 fcf000 ( 15.809 MB)
Stack 1ed0000 7a000 ( 488.000 kB)
TEB ffe8a000 1000 ( 4.000 kB)
Other fffb0000 23000 ( 140.000 kB)
PEB fffde000 1000 ( 4.000 kB)
0:000> !ao
---------Heap 1 ---------
Managed OOM occured after GC #2924 (Requested to allocate 0 bytes)
Reason: Didn't have enough memory to allocate an LOH segment
Detail: LOH: Failed to reserve memory (117440512 bytes)
---------Heap 7 ---------
Managed OOM occured after GC #2308 (Requested to allocate 0 bytes)
Reason: Could not do a full GC
0:000> !vmstat
TYPE MINIMUM MAXIMUM AVERAGE BLK COUNT TOTAL
~~~~ ~~~~~~~ ~~~~~~~ ~~~~~~~ ~~~~~~~~~ ~~~~~
Free:
Small 4K 64K 34K 219 7,475K
Medium 72K 832K 273K 80 21,903K
Large 1,080K 65,536K 7,954K 49 389,759K
Summary 4K 65,536K 1,204K 348 419,139K
Reserve:
Small 4K 64K 14K 436 6,519K
Medium 88K 1,020K 303K 169 51,303K
Large 1,088K 65,528K 21,052K 141 2,968,407K
Summary 4K 65,528K 4,056K 746 3,026,231K
Commit:
Small 4K 64K 16K 2,019 33,386K
Medium 68K 1,024K 287K 275 79,043K
Large 1,028K 65,736K 7,315K 87 636,435K
Summary 4K 65,736K 314K 2,381 748,866K
Private:
Small 4K 64K 28K 851 23,911K
Medium 88K 1,024K 313K 222 69,687K
Large 1,028K 65,736K 18,429K 186 3,427,951K
Summary 4K 65,736K 2,797K 1,259 3,521,550K
Mapped:
Small 4K 64K 18K 23 431K
Medium 68K 1,004K 385K 11 4,239K
Large 1,520K 6,640K 3,684K 6 22,104K
Summary 4K 6,640K 669K 40 26,775K
Image:
Small 4K 64K 9K 1,581 15,562K
Medium 68K 1,000K 267K 211 56,419K
Large 1,028K 15,732K 4,299K 36 154,787K
Summary 4K 15,732K 124K 1,828 226,771K
0:000> !eeheap -gc
Number of GC Heaps: 8
------------------------------
Heap 0 (01cd1720)
generation 0 starts at 0x44470de4
generation 1 starts at 0x43f51000
generation 2 starts at 0x02161000
ephemeral segment allocation context: none
segment begin allocated size
02160000 02161000 02dee4a8 0xc8d4a8(13161640)
43f50000 43f51000 444b9364 0x568364(5669732)
Large object heap starts at 0x12161000
segment begin allocated size
12160000 12161000 121bd590 0x5c590(378256)
c2010000 c2011000 c6041020 0x4030020(67305504)
Heap Size: Size: 0x5281dbc (86515132) bytes.
------------------------------
Heap 1 (01cd65a8)
generation 0 starts at 0x8c4b38e0
generation 1 starts at 0x8c011000
generation 2 starts at 0x04161000
ephemeral segment allocation context: none
segment begin allocated size
04160000 04161000 054114f0 0x12b04f0(19596528)
25c40000 25c41000 25fc7328 0x386328(3695400)
8c010000 8c011000 8c4c4778 0x4b3778(4929400)
Large object heap starts at 0x13161000
segment begin allocated size
13160000 13161000 13161010 0x10(16)
Heap Size: Size: 0x1ae9fa0 (28221344) bytes.
------------------------------
Heap 2 (01cdb5c0)
generation 0 starts at 0x4a71a420
generation 1 starts at 0x49f51000
generation 2 starts at 0x06161000
ephemeral segment allocation context: none
segment begin allocated size
06160000 06161000 06e89b18 0xd28b18(13798168)
27c40000 27c41000 27f8f6dc 0x34e6dc(3466972)
9a010000 9a011000 9a5900b8 0x57f0b8(5763256)
49f50000 49f51000 4a72cc2c 0x7dbc2c(8240172)
Large object heap starts at 0x14161000
segment begin allocated size
14160000 14161000 14161010 0x10(16)
Heap Size: Size: 0x1dd1ee8 (31268584) bytes.
------------------------------
Heap 3 (01ce05d8)
generation 0 starts at 0x34fbe540
generation 1 starts at 0x34d11000
generation 2 starts at 0x08161000
ephemeral segment allocation context: none
segment begin allocated size
08160000 08161000 08c26248 0xac5248(11293256)
2bc40000 2bc41000 2bfc9294 0x388294(3703444)
34d10000 34d11000 34fcdbb0 0x2bcbb0(2870192)
Large object heap starts at 0x15161000
segment begin allocated size
15160000 15161000 151c3b10 0x62b10(404240)
Heap Size: Size: 0x116cb9c (18271132) bytes.
------------------------------
Heap 4 (01ce55f0)
generation 0 starts at 0x934a7cec
generation 1 starts at 0x93011000
generation 2 starts at 0x0a161000
ephemeral segment allocation context: none
segment begin allocated size
0a160000 0a161000 0b4bf898 0x135e898(20310168)
45f50000 45f51000 45f70df4 0x1fdf4(130548)
93010000 93011000 934b83ec 0x4a73ec(4879340)
Large object heap starts at 0x16161000
segment begin allocated size
16160000 16161000 161ab050 0x4a050(303184)
Heap Size: Size: 0x186fac8 (25623240) bytes.
------------------------------
Heap 5 (01cec608)
generation 0 starts at 0x31f1d4d0
generation 1 starts at 0x31c41000
generation 2 starts at 0x0c161000
ephemeral segment allocation context: none
segment begin allocated size
0c160000 0c161000 0d2120b0 0x10b10b0(17502384)
7aea0000 7aea1000 7af5c074 0xbb074(766068)
31c40000 31c41000 31f2caac 0x2ebaac(3062444)
Large object heap starts at 0x17161000
segment begin allocated size
17160000 17161000 17179ad0 0x18ad0(101072)
Heap Size: Size: 0x14706a0 (21431968) bytes.
------------------------------
Heap 6 (01cf5a20)
generation 0 starts at 0x5fbb5598
generation 1 starts at 0x5f821000
generation 2 starts at 0x0e161000
ephemeral segment allocation context: none
segment begin allocated size
0e160000 0e161000 0eb22284 0x9c1284(10228356)
5f820000 5f821000 5fbc9838 0x3a8838(3835960)
Large object heap starts at 0x18161000
segment begin allocated size
18160000 18161000 18161010 0x10(16)
Heap Size: Size: 0xd69acc (14064332) bytes.
------------------------------
Heap 7 (01cfaa38)
generation 0 starts at 0xad530e00
generation 1 starts at 0xad011000
generation 2 starts at 0x10161000
ephemeral segment allocation context: none
segment begin allocated size
10160000 10161000 109bd218 0x85c218(8765976)
a4010000 a4011000 a42f418c 0x2e318c(3027340)
41f50000 41f51000 42a99090 0xb48090(11829392)
ad010000 ad011000 ad5399a0 0x5289a0(5409184)
Large object heap starts at 0x19161000
segment begin allocated size
19160000 19161000 1980ddb0 0x6acdb0(6999472)
Heap Size: Size: 0x225cb84 (36031364) bytes.
------------------------------
GC Heap Size: Size: 0xf950f98 (261427096) bytes.
0:000> !heap -s
SEGMENT HEAP ERROR: failed to initialize the extention
LFH Key : 0x3a251113
Termination on corruption : ENABLED
Heap Flags Reserv Commit Virt Free List UCR Virt Lock Fast
(k) (k) (k) (k) length blocks cont. heap
-----------------------------------------------------------------------------
Virtual block: 1a830000 - 1a830000 (size 00000000)
Virtual block: 1a9d0000 - 1a9d0000 (size 00000000)
007b0000 00000002 16384 15520 16384 198 418 5 2 3 LFH
00280000 00001002 3136 1608 3136 7 23 3 0 0 LFH
00a40000 00001002 1088 828 1088 79 25 2 0 0 LFH
00c30000 00001002 1088 308 1088 13 5 2 0 0 LFH
00100000 00041002 256 4 256 2 1 1 0 0
01560000 00001002 256 24 256 3 4 1 0 0
01510000 00001002 64 4 64 2 1 1 0 0
01670000 00001002 64 4 64 2 1 1 0 0
00290000 00011002 256 4 256 1 2 1 0 0
01870000 00001002 256 8 256 3 3 1 0 0
004e0000 00001002 256 4 256 1 2 1 0 0
019e0000 00001002 256 4 256 2 1 1 0 0
01af0000 00001002 256 4 256 2 1 1 0 0
02080000 00001002 1280 396 1280 1 34 2 0 0 LFH
01fc0000 00041002 256 4 256 2 1 1 0 0
1b700000 00041002 256 256 256 6 4 1 0 0 LFH
21840000 00001002 64192 1880 64192 1639 13 12 0 0 LFH
External fragmentation 87 % (13 free blocks)
-----------------------------------------------------------------------------
如果我们回收w3wp，则所有内存将返回系统。因此，似乎没有内存泄漏。我知道mem_reserve映射到虚拟地址，并且分配了空间但未提交。问题是：是否有办法找出所有这些虚拟地址用完了。
我有内存转储，但是我无法访问服务器以获取性能计数器或其他内容。
谢谢大家！