20. Distributed Cache Guidelines
Deployment size Small farm Medium farm Large farm
Total number of users < 10,000 < 100,000 < 500,000
Recommended cache
size for the Distributed
Cache service
1 GB
(Default 10% RAM)
2.5 GB
(Manual adjustment)
12 GB
(Limit of16GB per server)
Total memory allocation
for the Distributed Cache
service (double the
recommended cache
size above)
2 GB
(Memory size must
match in all servers)
5 GB
24 GB
(32GB Max Limit)
Recommended
architectural
configuration
Dedicated server or co-
located on a front-end
server
Dedicated server Dedicated server
Minimum cache hosts
per farm
1 1 1
ERIC
Physical hardware resources, network connectivity, disk size and speed, location of data files, configuration of shared storage—all aspects must be taken into consideration based on the size of the farm and the projected amount of data.
SharePoint is both read and write intensive, so separating the I/O operations onto separate disks prevents excessive thrashing and cache hits
Suggest - one set of disks for search databases, one for temporary databases, and still another for content databases
Pre-size the databases up to the maximum recommended
size (200GB) if space is available and set autogrowth to a fixed size (e.g. 10MB or 20MB). This will prevent SQL from expanding databases unnecessarily and insure that growth happens in a manageable fashion
Defragment Database Indexes
Indexes can become fragmented over time as new INSERT, DELETE and UPDATE operations are performed
Plan for regular maintenance operations which include index defragmentation