This value reflects the number of searches of the data cache (expressed as a rate per second) that did not find the page in cache and required a disk read (a cache miss).
To determine how effective the overall cache design for this server is, wait until the load on a server has been normalized.
See the Data Cache tab on the Memory drilldown if the number of reads is high. Investigate the individual data cache's performance statistics.
A high level of physical reads should be expected shortly after a server is started and the caches have not been loaded. To determine how effective the overall cache design for this server is, wait until the load on a server has been normalized.
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