Short Description: Determines the number of databases that a server can hold in its database cache at one time.
Specifies the maximum size (in bytes) of the NSF buffer pool, a section of memory dedicated to buffering I/O transfers between Domino and disk storage. The maximum size depends on any limitations of the operating system, and the amount of system memory available. The minimum size is 4MB.
Note You can also use NSF_Buffer_Pool_Size_MB to set the maximum size of the NSF buffer pool. This is the same as NSF_Buffer_Pool_Size, except it specifies the size in megabytes instead of bytes. Use NSF_Buffer_Pool_Size_MB to avoid the 2GB limitation that exists for NSF_Buffer_Pool_Size due to NOTES.INI variable limits. (NOTES.INI variables are signed variables, and cannot be larger than 2GB.)
Determined automatically by the server or workstation. (This is strongly recommended, except on partitioned servers.) The more memory is available, the larger the server sets the default NSF_Buffer_Pool_Size. On workstations, the maximum setting of the NSF_Buffer_Pool_Size is 8MB (4MB for MAC). On the server, the default maximum is determined to be between 1/8 and 3/8 of available physical memory, depending on the overall size of physical memory. The defaults are not automatically adjusted on partitioned servers, so it will usually be necessary to adjust the maximum values in each partition to a fraction of memory such that the memory used by all partitions adds up to approximately 1/4 to 3/8 of memory.
None, although if this setting is omitted, the number of databases that the server can hold in its cache at one time is either 25, or the NSF_Buffer_Pool_Size value divided by 300K (whichever is greater).
Server and Workstation
Domino 7 Performance Tuning Redbook
Redbook: Domino 7 Performance Tuning