[Boost-users] [interprocess]shared_memory_object stores content in disk?

Subject: [Boost-users] [interprocess]shared_memory_object stores content in disk?
From: Adrian Yu (adrianandyu_at_[hidden])
Date: 2013-06-20 01:44:56

I'm training multiple networks based on a single database.

So to accelerate speed and reduce disk reading, I use
shared_memory_object class provided by boost. Since the lab
workstation is currently unavailable, I migrated my code to my
personal computer.

On the lab workstation, the host program successfully reads all data
to memory. But on my PC, strangely it creates a file on system drive
rather than storing the data in memory. The whole database is about
3.7 GB; the lab workstation has 32 GB memory and runs Windows Server
2008 R2; my PC has 8 GB memory and runs Windows 7.

There should be enough memory to store the data. So why? Are there
certain ways to force the program to keep all data in memory?