I have an interesting scenario. The application has higher value of Virtual Bytes than I would expect. On the other hand, the Private Bytes is at a reasonable value.
This a Java based application which also loads via JNI a .Net component to the same process. This is not the Java heap that takes the Virtual Bytes as I limit it via xmx parameter.
Is there a way I could analyze using Windbg the consumption of the Virutal Bytes? For instance, if the code opens a shared memory with another process - can I see it? Can I sum all those shared memory segments?
This is a production environment so I am somewhat limited
Thanks Saar
In user-mode debugging session you can use !address command !address -f:FileMap or !address -summary
0:018> !address -summary
Failed to map Heaps (error 80004005)
--- Usage Summary ---------------- RgnCount ----------- Total Size -------- %ofBusy %ofTotal
Free 211 7ff`f38e3000 ( 8.000 Tb) 100.00%
Image 577 0`05cec000 ( 92.922 Mb) 46.68% 0.00%
MemoryMappedFile 60 0`0375a000 ( 55.352 Mb) 27.81% 0.00%
<unclassified> 115 0`0289e000 ( 40.617 Mb) 20.41% 0.00%
Stack 60 0`00a00000 ( 10.000 Mb) 5.02% 0.00%
TEB 20 0`00028000 ( 160.000 kb) 0.08% 0.00%
PEB 1 0`00001000 ( 4.000 kb) 0.00% 0.00%
--- Type Summary (for busy) ------ RgnCount ----------- Total Size -------- %ofBusy %ofTotal
MEM_IMAGE 578 0`05ced000 ( 92.926 Mb) 46.68% 0.00%
MEM_MAPPED 60 0`0375a000 ( 55.352 Mb) 27.81% 0.00%
MEM_PRIVATE 195 0`032c6000 ( 50.773 Mb) 25.51% 0.00%
--- State Summary ---------------- RgnCount ----------- Total Size -------- %ofBusy %ofTotal
MEM_FREE 211 7ff`f38e3000 ( 8.000 Tb) 100.00%
MEM_COMMIT 782 0`08ae4000 ( 138.891 Mb) 69.78% 0.00%
MEM_RESERVE 51 0`03c29000 ( 60.160 Mb) 30.22% 0.00%
--- Protect Summary (for commit) - RgnCount ----------- Total Size -------- %ofBusy %ofTotal
PAGE_READONLY 336 0`050ca000 ( 80.789 Mb) 40.59% 0.00%
PAGE_EXECUTE_READ 104 0`02785000 ( 39.520 Mb) 19.85% 0.00%
PAGE_READWRITE 262 0`010db000 ( 16.855 Mb) 8.47% 0.00%
PAGE_WRITECOPY 59 0`0017d000 ( 1.488 Mb) 0.75% 0.00%
PAGE_READWRITE|PAGE_GUARD 20 0`0003c000 ( 240.000 kb) 0.12% 0.00%
PAGE_EXECUTE_READWRITE 1 0`00001000 ( 4.000 kb) 0.00% 0.00%
--- Largest Region by Usage ----------- Base Address -------- Region Size ----------
Free 0`ff8b5000 7fd`ed39b000 ( 7.992 Tb)
Image 7fe`fe39a000 0`0089e000 ( 8.617 Mb)
MemoryMappedFile 0`007b1000 0`012df000 ( 18.871 Mb)
<unclassified> 0`7f0e0000 0`00f00000 ( 15.000 Mb)
Stack 0`06740000 0`00079000 ( 484.000 kb)
TEB 7ff`fff94000 0`00002000 ( 8.000 kb)
PEB 7ff`fffd9000 0`00001000 ( 4.000 kb)