'Tuner Blog

The first Tuesday of the month is here for February and brings us two new rules - straight from customer engagements and supported by developers' knowledge.  The first of these is the notes.ini setting NLCACHE_SIZE, described in the Name Lookup Cache Testing section of the developerWorks article Domino 6 directory performance improvements.  We are suggesting this be set to 64MB (NLCACHE_SIZE=67108864) as a starting point to make best use of the cache.  The NameLookupCache is not greedy and will use only what is needed.  For example, if the NLCACHE_SIZE is specified as 67108864 (64MB), but only 32MB are needed, the cache will grow to 32MB, leaving the remaining 32MB for other Domino processes.  The second rule is for GROUP_CACHE_SIZE.  While similar to NLCACHE_SIZE, GROUP_CACHE_SIZE must be specified in KBytes and has a hard maximum of 15MB (15360.)  The Support document High CPU usage with large number of groups with large number of users suggests raising this limit to 12MB.  After consulting with core developers, we are suggesting it be taken right to the max of 15MB.  Check for Updates now and let us know your experiences!