Apart from the scaling problem in the Linux PMDA that Todd reported later with disk.dev.avactive and disk.dev.aveq, I am unaware of any problems with these metrics. Since the time metrics are in unit
Well spotted. The reason we had not found this earlier is that most of our Linux testing has been done on machines where HZ is 1024, so * 1000 / 1024 introduces only a very small error. Of course if
Apart from the scaling problem in the Linux PMDA that Todd reported later with disk.dev.avactive and disk.dev.aveq, I am unaware of any problems with these metrics. Since the time metrics are in unit
Well spotted. The reason we had not found this earlier is that most of our Linux testing has been done on machines where HZ is 1024, so * 1000 / 1024 introduces only a very small error. Of course if
With no disk activity on the system I see disk.dev.avactive and disk.dev.aveq on the root drive. The last sample had some disk io but the disk.dev.avactive number did not change and disk.dev.aveq num
I think I found part of the bug for these metrics. The metrics are being converted to milliseconds twice, in the sard patch and in the Linux pmda: From sard patch: +#define MSEC(x) ((x) * 1000 / HZ)
I should read _all_ my mail backlog before responding. Yep Todd, this looks busted. But I believe the Linux PMDA conversion dates from some version of the sard patch (or similar) in the past that did
The counters are correct. The semantics of these metrics are brain-dead from birth ... a genetic weakness passed down through the generations from sadc in Unix edition 7 or thereabouts. When we get t
With no disk activity on the system I see disk.dev.avactive and disk.dev.aveq on the root drive. The last sample had some disk io but the disk.dev.avactive number did not change and disk.dev.aveq num
I think I found part of the bug for these metrics. The metrics are being converted to milliseconds twice, in the sard patch and in the Linux pmda: From sard patch: +#define MSEC(x) ((x) * 1000 / HZ)
I should read _all_ my mail backlog before responding. Yep Todd, this looks busted. But I believe the Linux PMDA conversion dates from some version of the sard patch (or similar) in the past that did
The counters are correct. The semantics of these metrics are brain-dead from birth ... a genetic weakness passed down through the generations from sadc in Unix edition 7 or thereabouts. When we get t