This metric tells you have many database pages are currently being occupied in the data cache. The higher the buffer manager: database pages is, the less room there is for SQL Server to cache more data pages. This means that SQL Server may have to free up data cache pages order to make room for pages being moved in from disk to the data cache, which can increase disk IO and hurt performance. If the buffer manager: database pages increases above its typical baseline value, this may indicate memory pressure for the SQL Server instance.<\/p> \r\n\r\n
There are no specific thresholds for this counter as each server is different. Instead, watch baseline values and look for sudden changes in the baseline value.<\/p>","tsql":"SELECT cntr_value\r\n FROM sys.dm_os_performance_counters\r\n WHERE counter_name = 'Database pages'\r\n AND object_name LIKE '%Buffer Manager%';","instances":true,"frequency":60,"databases":{"mode":1},"rateofchange":false,"metricenabled":true,"noalertremark":"An alert is not required","alertdescription":"","aboveorbelow":"above","collections":1,"alertenabled":false,"_thresholds_high":{"selected":false},"_thresholds_medium":{"selected":false},"_thresholds_low":{"selected":false},"targetentitytype":0}