Total Server Memory and Target server memory

Question

Hi All,
SQL server 2005
Installed Memory 63gb
SQL server maximum memory is restricted to 32 gb                                             
Target Server Memory (KB) 33554432
Total Server Memory (KB) 33554432
SQL Server Buffer Manager
Counter Value
Buffer cache hit ratio                                                                                                          
5792
Free list stalls/sec                                                                                                            
806
Free pages                                                                                                                      
64040
Lazy writes/sec                                                                                                                 
423858
Page life expectancy                                                                                                            
883
Please let us know above settings means any memory pressure and let us know what be the best practice to avoid memory pressure if there is any.
Regards,
Shiva
Grateful to your time and support. Regards, Shiva

Answer 1

Hi,
some of the values you posted are no logical. but let's go over the values as you posted one by one:
* page life expectancy: number of seconds a page will stay in the buffer pool without references.
        883 seem to be OK, but not very high (more then 14 min)
* Buffer Cache Hit Ratio: Percentage of pages found in the buffer cache without having to read from disk. The ratio is the total number of cache hits divided by the total number of cache lookups over the last few thousand page accesses.
        I dont know how you got this value above 100%.
        I would suggest to use PERFMON to check the value, or this query:
SELECT (a.cntr_value * 1.0 / b.cntr_value) * 100.0 as BufferCacheHitRatio
FROM sys.dm_os_performance_counters a
JOIN (SELECT cntr_value,OBJECT_NAME
FROM sys.dm_os_performance_counters
WHERE counter_name = 'Buffer cache hit ratio base'
) b ON a.OBJECT_NAME = b.OBJECT_NAME
WHERE a.counter_name = 'Buffer cache hit ratio'
* Free list stalls/sec: frequency with which requests for available database pages are suspended because no buffers are available. Free list stall rates of 3 or 4 per second indicate too little SQL memory available.
806 is extrimly high value, look very bad! It should be around 2
* Lazy writes/sec: tracks how many times a second that the Lazy Writer process is moving dirty pages from the buffer to disk in order to free up buffer space.
423858 is extrimly high value, look very bad! It should be less then 20
** I have a feeling that you do no red the data currectly. Please check this link:
http://www.sqlshack.com/sql-server-memory-performance-metrics-part-5-understanding-lazy-writes-free-list-stallssec-memory-grants-pending/
** Go over this link as well :-)
http://www.grumpyolddba.co.uk/monitoring/Performance Counter Guidance - SQL Server.htm
[Personal Site] [Blog] [Facebook]