Hello, 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. Best Regards
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