I am trying to put together some performance counters and thresholds to see if our current GC placement is sufficient. We do not currently follow the 4:1 recommended placement and those responsible for the GC's want proof that the current design is not working. To address this I am trying to find out what DSAccess performance counters I should monitor and what is considered tolerable when it comes to response time from a GC. I know that ExBPA looks at the response time of GC's, but what I don't know is at what point does it flag a response time as an issue (what number is it looking for). Regards, Steven
Hi Steven, ExBPA performs an ICMP (ping) test between the Exchange server and each DC/GC in the DSAccess topology. A warning is raised if the round-trip time is >10ms, and an error is raised at >100ms. To be more accurate, you need to use Health/Performance Check (or perfmon) to sample the DSAccess performance counters as listed in http://www.microsoft.com/technet/prodtechnol/exchange/guides/TrblshtE2k3Perf/8d4b5381-bdab-44bc-9df4-35e9d6192b86.mspx. ExBPA reports the 90th percentile for these counters in the "Baseline" report. Cheers, -- Paul Bowden Program Manager Exchange Server Best Practices Analyzer http://www.microsoft.com/exchange/analyzers This posting is provided "AS IS" with no warranties, and confers no rights. "Steven" wrote in message news:OEmxz3DSGHA.5656@TK2MSFTNGP11.phx.gbl... >I am trying to put together some performance counters and thresholds to see >if our current GC placement is sufficient. We do not currently follow the >4:1 recommended placement and those responsible for the GC's want proof >that the current design is not working. To address this I am trying to >find out what DSAccess performance counters I should monitor and what is >considered tolerable when it comes to response time from a GC. I know that >ExBPA looks at the response time of GC's, but what I don't know is at what >point does it flag a response time as an issue (what number is it looking >for). > > Regards, > Steven >
Thanks Paul...this is a big help. Cheers "Paul Bowden [MSFT]" wrote in message news:uZuqTMGSGHA.4300@TK2MSFTNGP14.phx.gbl... > Hi Steven, > > ExBPA performs an ICMP (ping) test between the Exchange server and each > DC/GC in the DSAccess topology. A warning is raised if the round-trip time > is >10ms, and an error is raised at >100ms. > > To be more accurate, you need to use Health/Performance Check (or perfmon) > to sample the DSAccess performance counters as listed in > http://www.microsoft.com/technet/prodtechnol/exchange/guides/TrblshtE2k3Perf/8d4b5381-bdab-44bc-9df4-35e9d6192b86.mspx. > ExBPA reports the 90th percentile for these counters in the "Baseline" > report. > > Cheers, > -- > Paul Bowden > Program Manager > Exchange Server Best Practices Analyzer > http://www.microsoft.com/exchange/analyzers > > This posting is provided "AS IS" with no warranties, and confers no > rights. > > "Steven" wrote in message > news:OEmxz3DSGHA.5656@TK2MSFTNGP11.phx.gbl... >>I am trying to put together some performance counters and thresholds to >>see if our current GC placement is sufficient. We do not currently follow >>the 4:1 recommended placement and those responsible for the GC's want >>proof that the current design is not working. To address this I am trying >>to find out what DSAccess performance counters I should monitor and what >>is considered tolerable when it comes to response time from a GC. I know >>that ExBPA looks at the response time of GC's, but what I don't know is at >>what point does it flag a response time as an issue (what number is it >>looking for). >> >> Regards, >> Steven >> > >
