Hi All,
i'm looking at 2 counters on a production system where the PLE is avergaing 25-30 seconds and the Buffer Cache Hit Ratio is 99%.
Now from my understanding, the PLE *should* be 300 secs or more (this is a 8GB RAM system) otherwise SQL server's caches is constantly being refreshed, indicating memory pressure.
Buffer cache is constantly at 99% meaning SQL is finding the data for it's queries in memory and doesn't have to go to disk..indicating NO memory pressure.
So i'm confused as to what i'm seeing, can someone sort me out..am i seeing memory pressure or not..?
Thx in advance.