We just migrated from SQL 2008 R2 to SQL 2012 and a better hardware. We have not changed any code; but the compilations/sec has gone up from~30 to 600 to 800. CPU looks really good. Performance is good. Signal waits percent goes up every now and then up to 34(previously it was always below 25%) and procedure cache hit ratio goes down some times to 88%(previously it was always above 95%). We are
really concerned about the compilations/sec. Can anyone give some idea why this is happening?
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