(SOLVED) PixInsight (64bit) on WIN7 64bit - memory

[Christoph Puetz]

Hi all,

unfortunately I had to switch from Linux x64 to Win7 64bit os.
During processing of a large number of Canon DSRL pictures (>350 pics) with the "image integration function",
I found this behaviour:

My PC has 8GByte of Memory installed and under Linux PI did use it quite intensively (as exprected).
Under WIN 7 (x64) I found, that PI only used max 4GByte of RAM, although 8 GByte are available.
I could prove it with the process explorer software.
Could it be, that there is an internal limit for WIN7 x64, that allows a *single* process to allocate only 4096 Mbyte RAM ?

According to MS information (http://msdn.microsoft.com/en-us/library/aa366778%28v=vs.85%29.aspx), a process
can only allocate lots of mem, if the flag IMAGE_FILE_LARGE_ADDRESS_AWARE is set during linking.

Other software (as some 64bit HDR photo software) *can* allocate more than 4GByte.

Is this behaviour PI specific ?

Kind regards
Christoph

[Andres.Pozo]

Could it be, that there is an internal limit for WIN7 x64, that allows a *single* process to allocate only 4096 Mbyte RAM ?

No. In Win7 x64 a process can use all the available memory.

According to MS information (http://msdn.microsoft.com/en-us/library/aa366778%28v=vs.85%29.aspx), a process
can only allocate lots of mem, if the flag IMAGE_FILE_LARGE_ADDRESS_AWARE is set during linking.

This is only necessary in 32bits processes.

[twade]

Christoph,

I use Windows 7 64-bit too.  I've noticed my memory usage with no programs running averages about 3.8 GB.  I have 24 GB of memory so this isn't a problem for me.   Keep in mind, I do have processes that start at run time such as AV programs, and other miscellaneous processes.  It is possible you only had 4 GB left for PI once the OS has loaded everything at run time.  How much memory usage is the task manager indicating with no programs open?

Wade

[Christoph Puetz]

Thanks for your replies.
I think I found the simple answer: Process explorer is indicating the wrong memory usage 
In "Resource Explorer" the memory consumption is shown as about 6 GByte, leaving 2 GByte for the os, drivers and services.
It's hard to get back to windows, if you worked many years under Unix Systems 

Thanks to all !
Christoph