administration mode

Performance Peek blog

Article: Domino Name Lookup Cache »

CHRISTIAN DENCKER - NOV 25, 2010 (10:51:24 PM)

 

Look at your Notes.ini file on the Domino Server.

If you see this parammeter:

NLCACHE_SIZE=33554432 og NLCACHE_SIZE=67108864

Some one in your organization has payed attention to the IBM Business Partner

It means that the amount of memory used for Name look up has been set to 32 MB or 64 MB.

How do you check to see if this is the right size and performance the best ?

Go to your Domino console and write: Show Stat database.namelookup*

You will get something like this:

show stat Database.namelookup*
  Database.NAMELookupCacheCacheSize = 131.012
  Database.NAMELookupCacheHashSize = 1.379.435
  Database.NAMELookupCacheHits = 240.613
  Database.NAMELookupCacheLookups = 387.402
  Database.NAMELookupCacheMaxSize = 67.108.864
  Database.NAMELookupCacheMisses = 112.160
  Database.NAMELookupCacheMisses.ItemMisses = 111.816
  Database.NAMELookupCacheNoHitHits = 34.629
  Database.NAMELookupCachePool.Peak = 2.097.152
  Database.NAMELookupCachePool.Used = 1.657.120
  Database.NAMELookupCacheResets = 0
  Database.NAMELookupCache.ContainerResets = 1
  Database.NAMELookupCache.CriticalContainerResets = 0
  Database.NAMELookupCache.EligibleContainerResets = 2
  Database.NAMELookupMisses = 230
  Database.NAMELookupTotal = 371250
  Database.NAMELookupTotalLookupTime = 88,263
  17 statistics found
 

or you can do : Show nlcache


NLCache version 4  
CacheLookups:       387.590 
CacheHits:             240.727 
CacheMisses:         112.213 
CacheNoHitHits:      34.650  
CacheResets          0      
Maximum Cache Size:  67.108.864
CacheSize:           131.012            332 entries in Data Hash Table
HashSize:            1.379.435            21 entries in View Hash Table
CacheHitRate:        71      %

Is this CacheSize too big or too small ? It's way to big here .-D

More information can be found in Domino Technote 1191431

The name lookup performance improvemnet is massive when this has been tunned.