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VFP generates 37000 page faults per query--is this norma
Message
General information
Forum:
Visual FoxPro
Category:
Troubleshooting
Miscellaneous
Thread ID:
00649779
Message ID:
00650731
Views:
16
>Dave, thanks for the info.
>
>The high number of page faults was brought to my attention by an IS manager who was alarmed at the number that our VFP app was generating, especially compared to the other apps that were running on the same machine.

Page faults occur when the current process references something in virtual memory that is not present in physical RAM. This indicates that VFP is buffering the data in virtual memory rather than hitting the original disk file over and over again, hopefully using some faster access algorithms. I would not worry about it unless swap file space is a major issue - that 37K hits, if each represented a different 4K page, represents about 120MB of disk access if each page is only hit once; in all likelihood, the frequency is a lot higher.
EMail: EdR@edrauh.com
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