Bug 45728

Informational

VSD

5.5.1, 5.5, 5.4.2, 5.4, 5.3.1, 5.3, 5.2, 5.1.2, 5.1.1, 5.1, 5.0.1, 5.0, 4.0.2, 4.0.1, 4.0, 3.5, 3.2, earlier versions

With server data from versions earlier 3.3

With subsecond sampling, chart timestamps incorrect

When statmonitor uses sample sizes that are less than one second, the timestamps are written to the data files as if the samples were taken at 1 second intervals.  This is noted when you execute statmonitor, for example:

     WARNING: Sample Interval < 1 second
        vsd time base in sample points, not units of real time

VSD has no way to determine that these timestamps are not one second intervals.  When using subsecond samples and analyzing the resulting data, you must remember the sampling and adjust the time offsets manually.

Workaround

With GemStone/S 64 Bit 3.3, subsecond timestamps are written to VSD, and VSD versions 5.0 and later will produce accurate timestamps.


Last updated: 2/26/16