Resolution:
Description:
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When adding SHM transport from realm server, VIRT digit is increased although physical memory is sufficient.

Environment:
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Linux

Resolution
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Virtual memory (VIRT) does not necessarily mean swapped memory space. Here it points to the chunk of memory Linux defers allocating, the shared memory. When the receiver starts receiving messages resident memory size (RES) of the receiver increases while the VIRT remains almost the same.  This proves that the Linux OS allocates the RES memory to preallocated VIRT space when the shared memory is being used.