Sizing your memory

SCADA systems can absorb significant PC memory. So how much do you buy? Too little can have serious consequences on system performance. Operating systems such as Windows NT provide virtual memory – essentially a file on the system’s hard disk that the operating system manages and presents to applications as memory (swap file). While there […]

SCADA systems can absorb significant PC memory. So how much do you buy? Too little can have serious consequences on system performance.

Operating systems such as Windows NT provide virtual memory – essentially a file on the system’s hard disk that the operating system manages and presents to applications as memory (swap file). While there is enough disk space, the operating system can continue allocating virtual RAM.

But, when virtual RAM becomes larger than physical RAM, significant swapping will occur and system performance will suffer.

You should therefore use tools like SPM/2 for OS/2 and Performance Monitor for Windows NT to establish memory used by a system.

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