Tell solaris pmda to only update instances of the domain which is been fetched.
Ken McDonell reported that fetching metrics in zpool.perdisk hierarchy
requires disk I/O which skews the picture for other disk I/O metrics
yet those metrics were refreshed each time someone ask something from
the solaris pmda even if the metrics which were fetched had nothing
to do with zpool.perdisk metrics.
Delay calls to prefetch until the pmdaFetchCallback where we
have the metric descriptor and can deduce the correct prefetch call
without doing the explicit search in the pmdaFetch method.
Tell solaris pmda to only update instances of the domain which is been fetched.
Ken McDonell reported that fetching metrics in zpool.perdisk hierarchy
requires disk I/O which skews the picture for other disk I/O metrics
yet those metrics were refreshed each time someone ask something from
the solaris pmda even if the metrics which were fetched had nothing
to do with zpool.perdisk metrics.
Delay calls to prefetch until the pmdaFetchCallback where we
have the metric descriptor and can deduce the correct prefetch call
without doing the explicit search in the pmdaFetch method.