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Peformance Exchange 2007/2010 Servers, key values

How to tell if an Exchange is slow or fast?

TRANSACTION_LOG_DISK: LogicalDisk(*)\Avg. Disk sec/Read < 20ms
TRANSACTION_LOG_DISK: LogicalDisk(*)\Avg. Disk sec/Write < 10ms

TEMP_DISK: LogicalDisk(*)\Avg. Disk sec/Read < 10ms
TEMP_DISK: LogicalDisk(*)\Avg. Disk sec/Write < 10ms

MSExchangeIS\RPC Requests < 70
MSExchangeIS\RPC Averaged Latency < 25

MSExchangeIS\RPC Operations/sec

MSExchangeIS\RPC Num. of Slow Packets < 1
MSExchangeIS Client (*)\RPC Average Latency < 50ms

MSExchangeIS\Client: RPCs Failed:Server Too Busy/sec < 0 all times
MSExchangeIS\Client: RPCs Failed:Server Too Busy < 0 all times

MSExchangeIS Mailbox(_Total)\Messages Queued for Submission < 50
MSExchangeIS Public(_Total)\Messages Queued for Submission < 20

MSExchange Database ==> Instances(*)\Log Generation Checkpoint Depth < 500 (20-30 for each SG)
MSExchange Database(Information Store)\Database Page Fault Stalls/sec < 0
MSExchange Database(Information Store)\Log Threads Waiting < 10
MSExchange Database Instances(*)\I/O Database Reads Average Latency < 20ms (50ms Spikes)

MSExchange Database(Information Store)\Database Cache Size (MB)