Below is a listing of adjustable mysql performance parameters, their descriptions and their current settings. Where applicable, the reasons and decisions that went into the current setting is provied.  Also presented is the health of the parameter with the date the study was done.  These parmaters should be reveiwed every six months or when the system warrents a review.


Parameter Setting DefinitionMysql Default
ReasoningHealthLast Checked
bulk_insert_buffer_size 8388608      
join_buffer_size 131072
table_cache 1024 Increases the amount of table that can be held open64
key_buffer_size 268435456 amount of memory available for index buffer523264
myisam_sort_buffer_size 67108864
net_buffer_length 16384
read_buffer_size 1044480
read_rnd_buffer_size 262144
sort_buffer_size 1048568 Each thread that needs to do a sort allocates a buffer of this size. Increasing the variable gives faster ORDER BY or GROUP BY operations