Im about to migrate a 6Tb database from Veritas Volume Manager to ZFS, I
want to set arc_max parameter so ZFS cant use all my system's memory, but i
dont know how much i should set, do you think 24Gb will be enough for a 6Tb
database? obviously the more the better but i cant set too much memory.
Have someone implemented succesfully something similar?
We ran some test and the usage of memory was as follow:
(With Arc_max at 30Gb)
Kernel = 18Gb
ZFS DATA = 55Gb
Anon = 90Gb
Page Cache = 10Gb
Free = 25Gb
My system have 192Gb RAM and the database SGA = 85Gb.
I would appreciate if someone could tell me about their experience.
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