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For counters in Windows Server 2008 R2 that count the total (instead of rate) at what number do they wrap around to zero? In this particular case I am interested in \Web Service(_Total)\Total Get Requests. Are they always maybe 32bit or 64bit. Or maybe it depends on if it is a 32bit or 64bit OS (in this case, R2 so has to be 64)?

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up vote 4 down vote accepted

It's a 32bit unsigned Integer.

Reference: Win32_PerformattedData_W3SVC_WebService -> TotalGetRequests

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Normally it will be an unsigned 32 bit (on 32-bit system) so 2^32 = 4294967296. So the range is 0-4294967295.

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Any references on that? That would be my guess as well, but rather find out for sure instead of a bug creeping up on me by the time I forget all about this. – Kyle Brandt Oct 11 '10 at 15:24
Whoever writes the code that publishes the counter can decide on the size, 32 or 64 bit; so there's really no 'normally' about it. It will be dependent on the particular counter in question. It's also actually pretty unlikely that it would be different on a 64 bit OS, it's more likely that you'd decide to use a 64bit counter if the count would otherwise wrap 'regularly'. – Len Holgate Oct 11 '10 at 20:21

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