Why does virtual memory increase when adding SHM transport from realm?
Article ID: KB0089967
Updated On:
| Products | Versions |
|---|---|
| TIBCO FTL | - |
| Not Applicable | - |
Description
Resolution:
Description:
===========
When adding SHM transport from realm server, VIRT digit is increased although physical memory is sufficient.
Environment:
===========
Linux
Resolution
=========
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.
Description:
===========
When adding SHM transport from realm server, VIRT digit is increased although physical memory is sufficient.
Environment:
===========
Linux
Resolution
=========
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.
Issue/Introduction
Why does virtual memory increase when adding SHM transport from realm?
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